mariadb/sql/sql_show.cc

/* Copyright (C) 2000-2004 MySQL AB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */


/* Function with list databases, tables or fields */

#include "mysql_priv.h"
#include "sql_select.h"                         // For select_describe
#include "repl_failsafe.h"
#include "sp.h"
#include "sp_head.h"
#include "sql_trigger.h"
#include <my_dir.h>

#ifdef HAVE_BERKELEY_DB
#include "ha_berkeley.h"			// For berkeley_show_logs
#endif

#ifndef NO_EMBEDDED_ACCESS_CHECKS
static const char *grant_names[]={
  "select","insert","update","delete","create","drop","reload","shutdown",
  "process","file","grant","references","index","alter"};

static TYPELIB grant_types = { sizeof(grant_names)/sizeof(char **),
                               "grant_types",
                               grant_names, NULL};
#endif

static int
store_create_info(THD *thd, TABLE_LIST *table_list, String *packet);
static void
append_algorithm(TABLE_LIST *table, String *buff);
static int
view_store_create_info(THD *thd, TABLE_LIST *table, String *buff);
static bool schema_table_store_record(THD *thd, TABLE *table);


/***************************************************************************
** List all table types supported 
***************************************************************************/

bool mysqld_show_storage_engines(THD *thd)
{
  List<Item> field_list;
  Protocol *protocol= thd->protocol;
  DBUG_ENTER("mysqld_show_storage_engines");

  field_list.push_back(new Item_empty_string("Engine",10));
  field_list.push_back(new Item_empty_string("Support",10));
  field_list.push_back(new Item_empty_string("Comment",80));

  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
    DBUG_RETURN(TRUE);

  const char *default_type_name= 
    ha_get_storage_engine((enum db_type)thd->variables.table_type);

  handlerton **types;
  for (types= sys_table_types; *types; types++)
  {
    if (!((*types)->flags & HTON_HIDDEN))
    {
      protocol->prepare_for_resend();
      protocol->store((*types)->name, system_charset_info);
      const char *option_name= show_comp_option_name[(int) (*types)->state];

      if ((*types)->state == SHOW_OPTION_YES &&
          !my_strcasecmp(system_charset_info, default_type_name, (*types)->name))
        option_name= "DEFAULT";
      protocol->store(option_name, system_charset_info);
      protocol->store((*types)->comment, system_charset_info);
      if (protocol->write())
        DBUG_RETURN(TRUE);
    }
  }
  send_eof(thd);
  DBUG_RETURN(FALSE);
}


/***************************************************************************
 List all privileges supported
***************************************************************************/

struct show_privileges_st {
  const char *privilege;
  const char *context;
  const char *comment;
};

static struct show_privileges_st sys_privileges[]=
{
  {"Alter", "Tables",  "To alter the table"},
  {"Alter routine", "Functions,Procedures",  "To alter or drop stored functions/procedures"},
  {"Create", "Databases,Tables,Indexes",  "To create new databases and tables"},
  {"Create routine","Functions,Procedures","To use CREATE FUNCTION/PROCEDURE"},
  {"Create temporary tables","Databases","To use CREATE TEMPORARY TABLE"},
  {"Create view", "Tables",  "To create new views"},
  {"Create user", "Server Admin",  "To create new users"},
  {"Delete", "Tables",  "To delete existing rows"},
  {"Drop", "Databases,Tables", "To drop databases, tables, and views"},
  {"Execute", "Functions,Procedures", "To execute stored routines"},
  {"File", "File access on server",   "To read and write files on the server"},
  {"Grant option",  "Databases,Tables,Functions,Procedures", "To give to other users those privileges you possess"},
  {"Index", "Tables",  "To create or drop indexes"},
  {"Insert", "Tables",  "To insert data into tables"},
  {"Lock tables","Databases","To use LOCK TABLES (together with SELECT privilege)"},
  {"Process", "Server Admin", "To view the plain text of currently executing queries"},
  {"References", "Databases,Tables", "To have references on tables"},
  {"Reload", "Server Admin", "To reload or refresh tables, logs and privileges"},
  {"Replication client","Server Admin","To ask where the slave or master servers are"},
  {"Replication slave","Server Admin","To read binary log events from the master"},
  {"Select", "Tables",  "To retrieve rows from table"},
  {"Show databases","Server Admin","To see all databases with SHOW DATABASES"},
  {"Show view","Tables","To see views with SHOW CREATE VIEW"},
  {"Shutdown","Server Admin", "To shut down the server"},
  {"Super","Server Admin","To use KILL thread, SET GLOBAL, CHANGE MASTER, etc."},
  {"Update", "Tables",  "To update existing rows"},
  {"Usage","Server Admin","No privileges - allow connect only"},
  {NullS, NullS, NullS}
};

bool mysqld_show_privileges(THD *thd)
{
  List<Item> field_list;
  Protocol *protocol= thd->protocol;
  DBUG_ENTER("mysqld_show_privileges");

  field_list.push_back(new Item_empty_string("Privilege",10));
  field_list.push_back(new Item_empty_string("Context",15));
  field_list.push_back(new Item_empty_string("Comment",NAME_LEN));

  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
    DBUG_RETURN(TRUE);

  show_privileges_st *privilege= sys_privileges;
  for (privilege= sys_privileges; privilege->privilege ; privilege++)
  {
    protocol->prepare_for_resend();
    protocol->store(privilege->privilege, system_charset_info);
    protocol->store(privilege->context, system_charset_info);
    protocol->store(privilege->comment, system_charset_info);
    if (protocol->write())
      DBUG_RETURN(TRUE);
  }
  send_eof(thd);
  DBUG_RETURN(FALSE);
}


/***************************************************************************
  List all column types
***************************************************************************/

struct show_column_type_st
{
  const char *type;
  uint size;
  const char *min_value;
  const char *max_value;
  uint precision;
  uint scale;
  const char *nullable;
  const char *auto_increment;
  const char *unsigned_attr;
  const char *zerofill;
  const char *searchable;
  const char *case_sensitivity;
  const char *default_value;
  const char *comment;
};

/* TODO: Add remaning types */

static struct show_column_type_st sys_column_types[]=
{
  {"tinyint",
    1,  "-128",  "127",  0,  0,  "YES",  "YES",
    "NO",   "YES", "YES",  "NO",  "NULL,0",
    "A very small integer"},
  {"tinyint unsigned",
    1,  "0"   ,  "255",  0,  0,  "YES",  "YES",
    "YES",  "YES",  "YES",  "NO",  "NULL,0",
    "A very small integer"},
};

bool mysqld_show_column_types(THD *thd)
{
  List<Item> field_list;
  Protocol *protocol= thd->protocol;
  DBUG_ENTER("mysqld_show_column_types");

  field_list.push_back(new Item_empty_string("Type",30));
  field_list.push_back(new Item_int("Size",(longlong) 1,
                                    MY_INT64_NUM_DECIMAL_DIGITS));
  field_list.push_back(new Item_empty_string("Min_Value",20));
  field_list.push_back(new Item_empty_string("Max_Value",20));
  field_list.push_back(new Item_return_int("Prec", 4, MYSQL_TYPE_SHORT));
  field_list.push_back(new Item_return_int("Scale", 4, MYSQL_TYPE_SHORT));
  field_list.push_back(new Item_empty_string("Nullable",4));
  field_list.push_back(new Item_empty_string("Auto_Increment",4));
  field_list.push_back(new Item_empty_string("Unsigned",4));
  field_list.push_back(new Item_empty_string("Zerofill",4));
  field_list.push_back(new Item_empty_string("Searchable",4));
  field_list.push_back(new Item_empty_string("Case_Sensitive",4));
  field_list.push_back(new Item_empty_string("Default",NAME_LEN));
  field_list.push_back(new Item_empty_string("Comment",NAME_LEN));

  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
    DBUG_RETURN(TRUE);

  /* TODO: Change the loop to not use 'i' */
  for (uint i=0; i < sizeof(sys_column_types)/sizeof(sys_column_types[0]); i++)
  {
    protocol->prepare_for_resend();
    protocol->store(sys_column_types[i].type, system_charset_info);
    protocol->store((ulonglong) sys_column_types[i].size);
    protocol->store(sys_column_types[i].min_value, system_charset_info);
    protocol->store(sys_column_types[i].max_value, system_charset_info);
    protocol->store_short((longlong) sys_column_types[i].precision);
    protocol->store_short((longlong) sys_column_types[i].scale);
    protocol->store(sys_column_types[i].nullable, system_charset_info);
    protocol->store(sys_column_types[i].auto_increment, system_charset_info);
    protocol->store(sys_column_types[i].unsigned_attr, system_charset_info);
    protocol->store(sys_column_types[i].zerofill, system_charset_info);
    protocol->store(sys_column_types[i].searchable, system_charset_info);
    protocol->store(sys_column_types[i].case_sensitivity, system_charset_info);
    protocol->store(sys_column_types[i].default_value, system_charset_info);
    protocol->store(sys_column_types[i].comment, system_charset_info);
    if (protocol->write())
      DBUG_RETURN(TRUE);
  }
  send_eof(thd);
  DBUG_RETURN(FALSE);
}


/*
  find_files() - find files in a given directory.

  SYNOPSIS
    find_files()
    thd                 thread handler
    files               put found files in this list
    db                  database name to set in TABLE_LIST structure
    path                path to database
    wild                filter for found files
    dir                 read databases in path if TRUE, read .frm files in
                        database otherwise

  RETURN
    FIND_FILES_OK       success
    FIND_FILES_OOM      out of memory error
    FIND_FILES_DIR      no such directory, or directory can't be read
*/

enum find_files_result {
  FIND_FILES_OK,
  FIND_FILES_OOM,
  FIND_FILES_DIR
};

static
find_files_result
find_files(THD *thd, List<char> *files, const char *db,
           const char *path, const char *wild, bool dir)
{
  uint i;
  char *ext;
  MY_DIR *dirp;
  FILEINFO *file;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  uint col_access=thd->col_access;
#endif
  TABLE_LIST table_list;
  DBUG_ENTER("find_files");

  if (wild && !wild[0])
    wild=0;

  bzero((char*) &table_list,sizeof(table_list));

  if (!(dirp = my_dir(path,MYF(dir ? MY_WANT_STAT : 0))))
  {
    if (my_errno == ENOENT)
      my_error(ER_BAD_DB_ERROR, MYF(ME_BELL+ME_WAITTANG), db);
    else
      my_error(ER_CANT_READ_DIR, MYF(ME_BELL+ME_WAITTANG), path, my_errno);
    DBUG_RETURN(FIND_FILES_DIR);
  }

  for (i=0 ; i < (uint) dirp->number_off_files  ; i++)
  {
    file=dirp->dir_entry+i;
    if (dir)
    {                                           /* Return databases */
#ifdef USE_SYMDIR
      char *ext;
      char buff[FN_REFLEN];
      if (my_use_symdir && !strcmp(ext=fn_ext(file->name), ".sym"))
      {
	/* Only show the sym file if it points to a directory */
	char *end;
        *ext=0;                                 /* Remove extension */
	unpack_dirname(buff, file->name);
	end= strend(buff);
	if (end != buff && end[-1] == FN_LIBCHAR)
	  end[-1]= 0;				// Remove end FN_LIBCHAR
        if (!my_stat(buff, file->mystat, MYF(0)))
               continue;
       }
#endif
        if (file->name[0] == '.' || !MY_S_ISDIR(file->mystat->st_mode) ||
            (wild && wild_compare(file->name,wild,0)))
          continue;
    }
    else
    {
        // Return only .frm files which aren't temp files.
      if (my_strcasecmp(system_charset_info, ext=fn_ext(file->name),reg_ext) ||
          is_prefix(file->name,tmp_file_prefix))
        continue;
      *ext=0;
      if (wild)
      {
	if (lower_case_table_names)
	{
	  if (wild_case_compare(files_charset_info, file->name, wild))
	    continue;
	}
	else if (wild_compare(file->name,wild,0))
	  continue;
      }
    }
#ifndef NO_EMBEDDED_ACCESS_CHECKS
    /* Don't show tables where we don't have any privileges */
    if (db && !(col_access & TABLE_ACLS))
    {
      table_list.db= (char*) db;
      table_list.db_length= strlen(db);
      table_list.table_name= file->name;
      table_list.table_name_length= strlen(file->name);
      table_list.grant.privilege=col_access;
      if (check_grant(thd, TABLE_ACLS, &table_list, 1, 1, 1))
        continue;
    }
#endif
    if (files->push_back(thd->strdup(file->name)))
    {
      my_dirend(dirp);
      DBUG_RETURN(FIND_FILES_OOM);
    }
  }
  DBUG_PRINT("info",("found: %d files", files->elements));
  my_dirend(dirp);

  VOID(ha_find_files(thd,db,path,wild,dir,files));

  DBUG_RETURN(FIND_FILES_OK);
}


bool
mysqld_show_create(THD *thd, TABLE_LIST *table_list)
{
  Protocol *protocol= thd->protocol;
  char buff[2048];
  String buffer(buff, sizeof(buff), system_charset_info);
  DBUG_ENTER("mysqld_show_create");
  DBUG_PRINT("enter",("db: %s  table: %s",table_list->db,
                      table_list->table_name));

  /* We want to preserve the tree for views. */
  thd->lex->view_prepare_mode= TRUE;

  /* Only one table for now, but VIEW can involve several tables */
  if (open_normal_and_derived_tables(thd, table_list, 0))
  {
    if (!table_list->view || thd->net.last_errno != ER_VIEW_INVALID)
      DBUG_RETURN(TRUE);

    /*
      Clear all messages with 'error' level status and
      issue a warning with 'warning' level status in 
      case of invalid view and last error is ER_VIEW_INVALID
    */
    mysql_reset_errors(thd, true);
    thd->clear_error();

    push_warning_printf(thd,MYSQL_ERROR::WARN_LEVEL_WARN,
                        ER_VIEW_INVALID,
                        ER(ER_VIEW_INVALID),
                        table_list->view_db.str,
                        table_list->view_name.str);
  }

  /* TODO: add environment variables show when it become possible */
  if (thd->lex->only_view && !table_list->view)
  {
    my_error(ER_WRONG_OBJECT, MYF(0),
             table_list->db, table_list->table_name, "VIEW");
    DBUG_RETURN(TRUE);
  }

  buffer.length(0);
  if ((table_list->view ?
       view_store_create_info(thd, table_list, &buffer) :
       store_create_info(thd, table_list, &buffer)))
    DBUG_RETURN(TRUE);

  List<Item> field_list;
  if (table_list->view)
  {
    field_list.push_back(new Item_empty_string("View",NAME_LEN));
    field_list.push_back(new Item_empty_string("Create View",
                                               max(buffer.length(),1024)));
  }
  else
  {
    field_list.push_back(new Item_empty_string("Table",NAME_LEN));
    // 1024 is for not to confuse old clients
    field_list.push_back(new Item_empty_string("Create Table",
                                               max(buffer.length(),1024)));
  }

  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
    DBUG_RETURN(TRUE);
  protocol->prepare_for_resend();
  if (table_list->view)
    protocol->store(table_list->view_name.str, system_charset_info);
  else
  {
    if (table_list->schema_table)
      protocol->store(table_list->schema_table->table_name,
                      system_charset_info);
    else
      protocol->store(table_list->table->alias, system_charset_info);
  }
  protocol->store(buffer.ptr(), buffer.length(), buffer.charset());

  if (protocol->write())
    DBUG_RETURN(TRUE);
  send_eof(thd);
  DBUG_RETURN(FALSE);
}

bool mysqld_show_create_db(THD *thd, char *dbname,
                           const HA_CREATE_INFO *create_info)
{
  char buff[2048];
  String buffer(buff, sizeof(buff), system_charset_info);
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  Security_context *sctx= thd->security_ctx;
  uint db_access;
#endif
  HA_CREATE_INFO create;
  uint create_options = create_info ? create_info->options : 0;
  Protocol *protocol=thd->protocol;
  DBUG_ENTER("mysql_show_create_db");

  if (check_db_name(dbname))
  {
    my_error(ER_WRONG_DB_NAME, MYF(0), dbname);
    DBUG_RETURN(TRUE);
  }

#ifndef NO_EMBEDDED_ACCESS_CHECKS
  if (test_all_bits(sctx->master_access, DB_ACLS))
    db_access=DB_ACLS;
  else
    db_access= (acl_get(sctx->host, sctx->ip, sctx->priv_user, dbname, 0) |
		sctx->master_access);
  if (!(db_access & DB_ACLS) && (!grant_option || check_grant_db(thd,dbname)))
  {
    my_error(ER_DBACCESS_DENIED_ERROR, MYF(0),
             sctx->priv_user, sctx->host_or_ip, dbname);
    mysql_log.write(thd,COM_INIT_DB,ER(ER_DBACCESS_DENIED_ERROR),
		    sctx->priv_user, sctx->host_or_ip, dbname);
    DBUG_RETURN(TRUE);
  }
#endif
  if (!my_strcasecmp(system_charset_info, dbname,
                     INFORMATION_SCHEMA_NAME.str))
  {
    dbname= INFORMATION_SCHEMA_NAME.str;
    create.default_table_charset= system_charset_info;
  }
  else
  {
    if (check_db_dir_existence(dbname))
    {
      my_error(ER_BAD_DB_ERROR, MYF(0), dbname);
      DBUG_RETURN(TRUE);
    }

    load_db_opt_by_name(thd, dbname, &create);
  }
  List<Item> field_list;
  field_list.push_back(new Item_empty_string("Database",NAME_LEN));
  field_list.push_back(new Item_empty_string("Create Database",1024));

  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
    DBUG_RETURN(TRUE);

  protocol->prepare_for_resend();
  protocol->store(dbname, strlen(dbname), system_charset_info);
  buffer.length(0);
  buffer.append(STRING_WITH_LEN("CREATE DATABASE "));
  if (create_options & HA_LEX_CREATE_IF_NOT_EXISTS)
    buffer.append(STRING_WITH_LEN("/*!32312 IF NOT EXISTS*/ "));
  append_identifier(thd, &buffer, dbname, strlen(dbname));

  if (create.default_table_charset)
  {
    buffer.append(STRING_WITH_LEN(" /*!40100"));
    buffer.append(STRING_WITH_LEN(" DEFAULT CHARACTER SET "));
    buffer.append(create.default_table_charset->csname);
    if (!(create.default_table_charset->state & MY_CS_PRIMARY))
    {
      buffer.append(STRING_WITH_LEN(" COLLATE "));
      buffer.append(create.default_table_charset->name);
    }
    buffer.append(STRING_WITH_LEN(" */"));
  }
  protocol->store(buffer.ptr(), buffer.length(), buffer.charset());

  if (protocol->write())
    DBUG_RETURN(TRUE);
  send_eof(thd);
  DBUG_RETURN(FALSE);
}

bool
mysqld_show_logs(THD *thd)
{
  List<Item> field_list;
  Protocol *protocol= thd->protocol;
  DBUG_ENTER("mysqld_show_logs");

  field_list.push_back(new Item_empty_string("File",FN_REFLEN));
  field_list.push_back(new Item_empty_string("Type",10));
  field_list.push_back(new Item_empty_string("Status",10));

  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
    DBUG_RETURN(TRUE);

#ifdef HAVE_BERKELEY_DB
  if ((have_berkeley_db == SHOW_OPTION_YES) && berkeley_show_logs(protocol))
    DBUG_RETURN(TRUE);
#endif

  send_eof(thd);
  DBUG_RETURN(FALSE);
}


/****************************************************************************
  Return only fields for API mysql_list_fields
  Use "show table wildcard" in mysql instead of this
****************************************************************************/

void
mysqld_list_fields(THD *thd, TABLE_LIST *table_list, const char *wild)
{
  TABLE *table;
  DBUG_ENTER("mysqld_list_fields");
  DBUG_PRINT("enter",("table: %s",table_list->table_name));

  if (open_normal_and_derived_tables(thd, table_list, 0))
    DBUG_VOID_RETURN;
  table= table_list->table;

  List<Item> field_list;

  Field **ptr,*field;
  for (ptr=table->field ; (field= *ptr); ptr++)
  {
    if (!wild || !wild[0] || 
        !wild_case_compare(system_charset_info, field->field_name,wild))
    {
      if (table_list->view)
        field_list.push_back(new Item_ident_for_show(field,
                                                     table_list->view_db.str,
                                                     table_list->view_name.str));
      else
        field_list.push_back(new Item_field(field));
    }
  }
  restore_record(table, s->default_values);              // Get empty record
  if (thd->protocol->send_fields(&field_list, Protocol::SEND_DEFAULTS |
                                              Protocol::SEND_EOF))
    DBUG_VOID_RETURN;
  thd->protocol->flush();
  DBUG_VOID_RETURN;
}


int
mysqld_dump_create_info(THD *thd, TABLE_LIST *table_list, int fd)
{
  Protocol *protocol= thd->protocol;
  String *packet= protocol->storage_packet();
  DBUG_ENTER("mysqld_dump_create_info");
  DBUG_PRINT("enter",("table: %s",table_list->table->s->table_name));

  protocol->prepare_for_resend();
  if (store_create_info(thd, table_list, packet))
    DBUG_RETURN(-1);

  if (fd < 0)
  {
    if (protocol->write())
      DBUG_RETURN(-1);
    protocol->flush();
  }
  else
  {
    if (my_write(fd, (const byte*) packet->ptr(), packet->length(),
		 MYF(MY_WME)))
      DBUG_RETURN(-1);
  }
  DBUG_RETURN(0);
}

/*
  Go through all character combinations and ensure that sql_lex.cc can
  parse it as an identifier.

  SYNOPSIS
  require_quotes()
  name			attribute name
  name_length		length of name

  RETURN
    #	Pointer to conflicting character
    0	No conflicting character
*/

static const char *require_quotes(const char *name, uint name_length)
{
  uint length;
  const char *end= name + name_length;

  for (; name < end ; name++)
  {
    uchar chr= (uchar) *name;
    length= my_mbcharlen(system_charset_info, chr);
    if (length == 1 && !system_charset_info->ident_map[chr])
      return name;
  }
  return 0;
}


/*
  Quote the given identifier if needed and append it to the target string.
  If the given identifier is empty, it will be quoted.

  SYNOPSIS
  append_identifier()
  thd                   thread handler
  packet                target string
  name                  the identifier to be appended
  name_length           length of the appending identifier
*/

void
append_identifier(THD *thd, String *packet, const char *name, uint length)
{
  const char *name_end;
  char quote_char;
  int q= get_quote_char_for_identifier(thd, name, length);

  if (q == EOF)
  {
    packet->append(name, length, system_charset_info);
    return;
  }

  /*
    The identifier must be quoted as it includes a quote character or
   it's a keyword
  */

  VOID(packet->reserve(length*2 + 2));
  quote_char= (char) q;
  packet->append(&quote_char, 1, system_charset_info);

  for (name_end= name+length ; name < name_end ; name+= length)
  {
    uchar chr= (uchar) *name;
    length= my_mbcharlen(system_charset_info, chr);
    /*
      my_mbcharlen can retur 0 on a wrong multibyte
      sequence. It is possible when upgrading from 4.0,
      and identifier contains some accented characters.
      The manual says it does not work. So we'll just
      change length to 1 not to hang in the endless loop.
    */
    if (!length)
      length= 1;
    if (length == 1 && chr == (uchar) quote_char)
      packet->append(&quote_char, 1, system_charset_info);
    packet->append(name, length, packet->charset());
  }
  packet->append(&quote_char, 1, system_charset_info);
}


/*
  Get the quote character for displaying an identifier.

  SYNOPSIS
    get_quote_char_for_identifier()
    thd		Thread handler
    name	name to quote
    length	length of name

  IMPLEMENTATION
    Force quoting in the following cases:
      - name is empty (for one, it is possible when we use this function for
        quoting user and host names for DEFINER clause);
      - name is a keyword;
      - name includes a special character;
    Otherwise identifier is quoted only if the option OPTION_QUOTE_SHOW_CREATE
    is set.

  RETURN
    EOF	  No quote character is needed
    #	  Quote character
*/

int get_quote_char_for_identifier(THD *thd, const char *name, uint length)
{
  if (length &&
      !is_keyword(name,length) &&
      !require_quotes(name, length) &&
      !(thd->options & OPTION_QUOTE_SHOW_CREATE))
    return EOF;
  if (thd->variables.sql_mode & MODE_ANSI_QUOTES)
    return '"';
  return '`';
}


/* Append directory name (if exists) to CREATE INFO */

static void append_directory(THD *thd, String *packet, const char *dir_type,
			     const char *filename)
{
  if (filename && !(thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE))
  {
    uint length= dirname_length(filename);
    packet->append(' ');
    packet->append(dir_type);
    packet->append(STRING_WITH_LEN(" DIRECTORY='"));
#ifdef __WIN__
    /* Convert \ to / to be able to create table on unix */
    char *winfilename= (char*) thd->memdup(filename, length);
    char *pos, *end;
    for (pos= winfilename, end= pos+length ; pos < end ; pos++)
    {
      if (*pos == '\\')
        *pos = '/';
    }
    filename= winfilename;
#endif
    packet->append(filename, length);
    packet->append('\'');
  }
}


#define LIST_PROCESS_HOST_LEN 64


static bool get_field_default_value(THD *thd, TABLE *table,
                                    Field *field, String *def_value,
                                    bool quoted)
{
  bool has_default;
  bool has_now_default;

  /* 
     We are using CURRENT_TIMESTAMP instead of NOW because it is
     more standard
  */
  has_now_default= table->timestamp_field == field && 
    field->unireg_check != Field::TIMESTAMP_UN_FIELD;
    
  has_default= (field->type() != FIELD_TYPE_BLOB &&
                !(field->flags & NO_DEFAULT_VALUE_FLAG) &&
                field->unireg_check != Field::NEXT_NUMBER &&
                !((thd->variables.sql_mode & (MODE_MYSQL323 | MODE_MYSQL40))
                  && has_now_default));

  def_value->length(0);
  if (has_default)
  {
    if (has_now_default)
      def_value->append(STRING_WITH_LEN("CURRENT_TIMESTAMP"));
    else if (!field->is_null())
    {                                             // Not null by default
      char tmp[MAX_FIELD_WIDTH];
      String type(tmp, sizeof(tmp), field->charset());
      field->val_str(&type);
      if (type.length())
      {
        String def_val;
        uint dummy_errors;
        /* convert to system_charset_info == utf8 */
        def_val.copy(type.ptr(), type.length(), field->charset(),
                     system_charset_info, &dummy_errors);
        if (quoted)
          append_unescaped(def_value, def_val.ptr(), def_val.length());
        else
          def_value->append(def_val.ptr(), def_val.length());
      }
      else if (quoted)
        def_value->append(STRING_WITH_LEN("''"));
    }
    else if (field->maybe_null() && quoted)
      def_value->append(STRING_WITH_LEN("NULL"));    // Null as default
    else
      return 0;

  }
  return has_default;
}


static int
store_create_info(THD *thd, TABLE_LIST *table_list, String *packet)
{
  List<Item> field_list;
  char tmp[MAX_FIELD_WIDTH], *for_str, buff[128], def_value_buf[MAX_FIELD_WIDTH];
  const char *alias;
  String type(tmp, sizeof(tmp), system_charset_info);
  String def_value(def_value_buf, sizeof(def_value_buf), system_charset_info);
  Field **ptr,*field;
  uint primary_key;
  KEY *key_info;
  TABLE *table= table_list->table;
  handler *file= table->file;
  TABLE_SHARE *share= table->s;
  HA_CREATE_INFO create_info;
  my_bool foreign_db_mode=    (thd->variables.sql_mode & (MODE_POSTGRESQL |
							  MODE_ORACLE |
							  MODE_MSSQL |
							  MODE_DB2 |
							  MODE_MAXDB |
							  MODE_ANSI)) != 0;
  my_bool limited_mysql_mode= (thd->variables.sql_mode &
			       (MODE_NO_FIELD_OPTIONS | MODE_MYSQL323 |
				MODE_MYSQL40)) != 0;
  DBUG_ENTER("store_create_info");
  DBUG_PRINT("enter",("table: %s", table->s->table_name));

  restore_record(table, s->default_values); // Get empty record

  if (share->tmp_table)
    packet->append(STRING_WITH_LEN("CREATE TEMPORARY TABLE "));
  else
    packet->append(STRING_WITH_LEN("CREATE TABLE "));
  if (table_list->schema_table)
    alias= table_list->schema_table->table_name;
  else
    alias= (lower_case_table_names == 2 ? table->alias :
            share->table_name);
  append_identifier(thd, packet, alias, strlen(alias));
  packet->append(STRING_WITH_LEN(" (\n"));

  for (ptr=table->field ; (field= *ptr); ptr++)
  {
    uint flags = field->flags;

    if (ptr != table->field)
      packet->append(STRING_WITH_LEN(",\n"));

    packet->append(STRING_WITH_LEN("  "));
    append_identifier(thd,packet,field->field_name, strlen(field->field_name));
    packet->append(' ');
    // check for surprises from the previous call to Field::sql_type()
    if (type.ptr() != tmp)
      type.set(tmp, sizeof(tmp), system_charset_info);
    else
      type.set_charset(system_charset_info);

    field->sql_type(type);
    packet->append(type.ptr(), type.length(), system_charset_info);

    if (field->has_charset() && 
        !(thd->variables.sql_mode & (MODE_MYSQL323 | MODE_MYSQL40)))
    {
      if (field->charset() != share->table_charset)
      {
	packet->append(STRING_WITH_LEN(" character set "));
	packet->append(field->charset()->csname);
      }
      /* 
	For string types dump collation name only if 
	collation is not primary for the given charset
      */
      if (!(field->charset()->state & MY_CS_PRIMARY))
      {
	packet->append(STRING_WITH_LEN(" collate "));
	packet->append(field->charset()->name);
      }
    }

    if (flags & NOT_NULL_FLAG)
      packet->append(STRING_WITH_LEN(" NOT NULL"));
    else if (field->type() == FIELD_TYPE_TIMESTAMP)
    {
      /*
        TIMESTAMP field require explicit NULL flag, because unlike
        all other fields they are treated as NOT NULL by default.
      */
      packet->append(STRING_WITH_LEN(" NULL"));
    }

    if (get_field_default_value(thd, table, field, &def_value, 1))
    {
      packet->append(STRING_WITH_LEN(" default "));
      packet->append(def_value.ptr(), def_value.length(), system_charset_info);
    }

    if (!limited_mysql_mode && table->timestamp_field == field && 
        field->unireg_check != Field::TIMESTAMP_DN_FIELD)
      packet->append(STRING_WITH_LEN(" on update CURRENT_TIMESTAMP"));

    if (field->unireg_check == Field::NEXT_NUMBER && 
        !(thd->variables.sql_mode & MODE_NO_FIELD_OPTIONS))
      packet->append(STRING_WITH_LEN(" auto_increment"));

    if (field->comment.length)
    {
      packet->append(STRING_WITH_LEN(" COMMENT "));
      append_unescaped(packet, field->comment.str, field->comment.length);
    }
  }

  key_info= table->key_info;
  bzero((char*) &create_info, sizeof(create_info));
  file->update_create_info(&create_info);
  primary_key= share->primary_key;

  for (uint i=0 ; i < share->keys ; i++,key_info++)
  {
    KEY_PART_INFO *key_part= key_info->key_part;
    bool found_primary=0;
    packet->append(STRING_WITH_LEN(",\n  "));

    if (i == primary_key && !strcmp(key_info->name, primary_key_name))
    {
      found_primary=1;
      packet->append(STRING_WITH_LEN("PRIMARY "));
    }
    else if (key_info->flags & HA_NOSAME)
      packet->append(STRING_WITH_LEN("UNIQUE "));
    else if (key_info->flags & HA_FULLTEXT)
      packet->append(STRING_WITH_LEN("FULLTEXT "));
    else if (key_info->flags & HA_SPATIAL)
      packet->append(STRING_WITH_LEN("SPATIAL "));
    packet->append(STRING_WITH_LEN("KEY "));

    if (!found_primary)
     append_identifier(thd, packet, key_info->name, strlen(key_info->name));

    if (!(thd->variables.sql_mode & MODE_NO_KEY_OPTIONS) &&
	!limited_mysql_mode && !foreign_db_mode)
    {
      if (key_info->algorithm == HA_KEY_ALG_BTREE)
        packet->append(STRING_WITH_LEN(" USING BTREE"));

      if (key_info->algorithm == HA_KEY_ALG_HASH)
        packet->append(STRING_WITH_LEN(" USING HASH"));

      // +BAR: send USING only in non-default case: non-spatial rtree
      if ((key_info->algorithm == HA_KEY_ALG_RTREE) &&
	  !(key_info->flags & HA_SPATIAL))
        packet->append(STRING_WITH_LEN(" USING RTREE"));

      // No need to send USING FULLTEXT, it is sent as FULLTEXT KEY
    }
    packet->append(STRING_WITH_LEN(" ("));

    for (uint j=0 ; j < key_info->key_parts ; j++,key_part++)
    {
      if (j)
        packet->append(',');

      if (key_part->field)
        append_identifier(thd,packet,key_part->field->field_name,
			  strlen(key_part->field->field_name));
      if (key_part->field &&
          (key_part->length !=
           table->field[key_part->fieldnr-1]->key_length() &&
           !(key_info->flags & (HA_FULLTEXT | HA_SPATIAL))))
      {
        buff[0] = '(';
        char* end=int10_to_str((long) key_part->length /
			       key_part->field->charset()->mbmaxlen,
			       buff + 1,10);
        *end++ = ')';
        packet->append(buff,(uint) (end-buff));
      }
    }
    packet->append(')');
  }

  /*
    Get possible foreign key definitions stored in InnoDB and append them
    to the CREATE TABLE statement
  */

  if ((for_str= file->get_foreign_key_create_info()))
  {
    packet->append(for_str, strlen(for_str));
    file->free_foreign_key_create_info(for_str);
  }

  packet->append(STRING_WITH_LEN("\n)"));
  if (!(thd->variables.sql_mode & MODE_NO_TABLE_OPTIONS) && !foreign_db_mode)
  {
    if (thd->variables.sql_mode & (MODE_MYSQL323 | MODE_MYSQL40))
      packet->append(STRING_WITH_LEN(" TYPE="));
    else
      packet->append(STRING_WITH_LEN(" ENGINE="));
    packet->append(file->table_type());

    /*
      Add AUTO_INCREMENT=... if there is an AUTO_INCREMENT column,
      and NEXT_ID > 1 (the default).  We must not print the clause
      for engines that do not support this as it would break the
      import of dumps, but as of this writing, the test for whether
      AUTO_INCREMENT columns are allowed and wether AUTO_INCREMENT=...
      is supported is identical, !(file->table_flags() & HA_NO_AUTO_INCREMENT))
      Because of that, we do not explicitly test for the feature,
      but may extrapolate its existence from that of an AUTO_INCREMENT column.
    */

    if (create_info.auto_increment_value > 1)
    {
      char *end;
      packet->append(" AUTO_INCREMENT=", 16);
      end= longlong10_to_str(create_info.auto_increment_value, buff,10);
      packet->append(buff, (uint) (end - buff));
    }

    
    if (share->table_charset &&
	!(thd->variables.sql_mode & MODE_MYSQL323) &&
	!(thd->variables.sql_mode & MODE_MYSQL40))
    {
      packet->append(STRING_WITH_LEN(" DEFAULT CHARSET="));
      packet->append(share->table_charset->csname);
      if (!(share->table_charset->state & MY_CS_PRIMARY))
      {
	packet->append(STRING_WITH_LEN(" COLLATE="));
	packet->append(table->s->table_charset->name);
      }
    }

    if (share->min_rows)
    {
      char *end;
      packet->append(STRING_WITH_LEN(" MIN_ROWS="));
      end= longlong10_to_str(share->min_rows, buff, 10);
      packet->append(buff, (uint) (end- buff));
    }

    if (share->max_rows && !table_list->schema_table)
    {
      char *end;
      packet->append(STRING_WITH_LEN(" MAX_ROWS="));
      end= longlong10_to_str(share->max_rows, buff, 10);
      packet->append(buff, (uint) (end - buff));
    }

    if (share->avg_row_length)
    {
      char *end;
      packet->append(STRING_WITH_LEN(" AVG_ROW_LENGTH="));
      end= longlong10_to_str(share->avg_row_length, buff,10);
      packet->append(buff, (uint) (end - buff));
    }

    if (share->db_create_options & HA_OPTION_PACK_KEYS)
      packet->append(STRING_WITH_LEN(" PACK_KEYS=1"));
    if (share->db_create_options & HA_OPTION_NO_PACK_KEYS)
      packet->append(STRING_WITH_LEN(" PACK_KEYS=0"));
    if (share->db_create_options & HA_OPTION_CHECKSUM)
      packet->append(STRING_WITH_LEN(" CHECKSUM=1"));
    if (share->db_create_options & HA_OPTION_DELAY_KEY_WRITE)
      packet->append(STRING_WITH_LEN(" DELAY_KEY_WRITE=1"));
    if (share->row_type != ROW_TYPE_DEFAULT)
    {
      packet->append(STRING_WITH_LEN(" ROW_FORMAT="));
      packet->append(ha_row_type[(uint) share->row_type]);
    }
    table->file->append_create_info(packet);
    if (share->comment.length)
    {
      packet->append(STRING_WITH_LEN(" COMMENT="));
      append_unescaped(packet, share->comment.str, share->comment.length);
    }
    if (share->connect_string.length)
    {
      packet->append(STRING_WITH_LEN(" CONNECTION="));
      append_unescaped(packet, share->connect_string.str, share->connect_string.length);
    }
    if (file->raid_type)
    {
      uint length;
      length= my_snprintf(buff,sizeof(buff),
			  " RAID_TYPE=%s RAID_CHUNKS=%d RAID_CHUNKSIZE=%ld",
			  my_raid_type(file->raid_type), file->raid_chunks,
			  file->raid_chunksize/RAID_BLOCK_SIZE);
      packet->append(buff, length);
    }
    append_directory(thd, packet, "DATA",  create_info.data_file_name);
    append_directory(thd, packet, "INDEX", create_info.index_file_name);
  }
  DBUG_RETURN(0);
}

void
view_store_options(THD *thd, TABLE_LIST *table, String *buff)
{
  append_algorithm(table, buff);
  append_definer(thd, buff, &table->definer.user, &table->definer.host);
  if (table->view_suid)
    buff->append(STRING_WITH_LEN("SQL SECURITY DEFINER "));
  else
    buff->append(STRING_WITH_LEN("SQL SECURITY INVOKER "));
}


/*
  Append DEFINER clause to the given buffer.
  
  SYNOPSIS
    append_definer()
    thd           [in] thread handle
    buffer        [inout] buffer to hold DEFINER clause
    definer_user  [in] user name part of definer
    definer_host  [in] host name part of definer
*/

static void append_algorithm(TABLE_LIST *table, String *buff)
{
  buff->append(STRING_WITH_LEN("ALGORITHM="));
  switch ((int8)table->algorithm) {
  case VIEW_ALGORITHM_UNDEFINED:
    buff->append(STRING_WITH_LEN("UNDEFINED "));
    break;
  case VIEW_ALGORITHM_TMPTABLE:
    buff->append(STRING_WITH_LEN("TEMPTABLE "));
    break;
  case VIEW_ALGORITHM_MERGE:
    buff->append(STRING_WITH_LEN("MERGE "));
    break;
  default:
    DBUG_ASSERT(0); // never should happen
  }
}


/*
  Append DEFINER clause to the given buffer.
  
  SYNOPSIS
    append_definer()
    thd           [in] thread handle
    buffer        [inout] buffer to hold DEFINER clause
    definer_user  [in] user name part of definer
    definer_host  [in] host name part of definer
*/

void append_definer(THD *thd, String *buffer, const LEX_STRING *definer_user,
                    const LEX_STRING *definer_host)
{
  buffer->append(STRING_WITH_LEN("DEFINER="));
  append_identifier(thd, buffer, definer_user->str, definer_user->length);
  buffer->append('@');
  append_identifier(thd, buffer, definer_host->str, definer_host->length);
  buffer->append(' ');
}


static int
view_store_create_info(THD *thd, TABLE_LIST *table, String *buff)
{
  my_bool foreign_db_mode= (thd->variables.sql_mode & (MODE_POSTGRESQL |
                                                       MODE_ORACLE |
                                                       MODE_MSSQL |
                                                       MODE_DB2 |
                                                       MODE_MAXDB |
                                                       MODE_ANSI)) != 0;
  /*
     Compact output format for view can be used
     - if user has db of this view as current db
     - if this view only references table inside it's own db
  */
  if (!thd->db || strcmp(thd->db, table->view_db.str))
    table->compact_view_format= FALSE;
  else
  {
    TABLE_LIST *tbl;
    table->compact_view_format= TRUE;
    for (tbl= thd->lex->query_tables;
         tbl;
         tbl= tbl->next_global)
    {
      if (strcmp(table->view_db.str, tbl->view ? tbl->view_db.str :tbl->db)!= 0)
      {
        table->compact_view_format= FALSE;
        break;
      }
    }
  }

  buff->append(STRING_WITH_LEN("CREATE "));
  if (!foreign_db_mode)
  {
    view_store_options(thd, table, buff);
  }
  buff->append(STRING_WITH_LEN("VIEW "));
  if (!table->compact_view_format)
  {
    append_identifier(thd, buff, table->view_db.str, table->view_db.length);
    buff->append('.');
  }
  append_identifier(thd, buff, table->view_name.str, table->view_name.length);
  buff->append(STRING_WITH_LEN(" AS "));

  /*
    We can't just use table->query, because our SQL_MODE may trigger
    a different syntax, like when ANSI_QUOTES is defined.
  */
  table->view->unit.print(buff);

  if (table->with_check != VIEW_CHECK_NONE)
  {
    if (table->with_check == VIEW_CHECK_LOCAL)
      buff->append(STRING_WITH_LEN(" WITH LOCAL CHECK OPTION"));
    else
      buff->append(STRING_WITH_LEN(" WITH CASCADED CHECK OPTION"));
  }
  return 0;
}


/****************************************************************************
  Return info about all processes
  returns for each thread: thread id, user, host, db, command, info
****************************************************************************/

class thread_info :public ilink {
public:
  static void *operator new(size_t size)
  {
    return (void*) sql_alloc((uint) size);
  }
  static void operator delete(void *ptr __attribute__((unused)),
                              size_t size __attribute__((unused)))
  { TRASH(ptr, size); }

  ulong thread_id;
  time_t start_time;
  uint   command;
  const char *user,*host,*db,*proc_info,*state_info;
  char *query;
};

#ifdef HAVE_EXPLICIT_TEMPLATE_INSTANTIATION
template class I_List<thread_info>;
#endif

void mysqld_list_processes(THD *thd,const char *user, bool verbose)
{
  Item *field;
  List<Item> field_list;
  I_List<thread_info> thread_infos;
  ulong max_query_length= (verbose ? thd->variables.max_allowed_packet :
			   PROCESS_LIST_WIDTH);
  Protocol *protocol= thd->protocol;
  DBUG_ENTER("mysqld_list_processes");

  field_list.push_back(new Item_int("Id", 0, MY_INT32_NUM_DECIMAL_DIGITS));
  field_list.push_back(new Item_empty_string("User",16));
  field_list.push_back(new Item_empty_string("Host",LIST_PROCESS_HOST_LEN));
  field_list.push_back(field=new Item_empty_string("db",NAME_LEN));
  field->maybe_null=1;
  field_list.push_back(new Item_empty_string("Command",16));
  field_list.push_back(new Item_return_int("Time",7, FIELD_TYPE_LONG));
  field_list.push_back(field=new Item_empty_string("State",30));
  field->maybe_null=1;
  field_list.push_back(field=new Item_empty_string("Info",max_query_length));
  field->maybe_null=1;
  if (protocol->send_fields(&field_list,
                            Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))
    DBUG_VOID_RETURN;

  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For unlink from list
  if (!thd->killed)
  {
    I_List_iterator<THD> it(threads);
    THD *tmp;
    while ((tmp=it++))
    {
      Security_context *tmp_sctx= tmp->security_ctx;
      struct st_my_thread_var *mysys_var;
      if ((tmp->vio_ok() || tmp->system_thread) &&
          (!user || (tmp_sctx->user && !strcmp(tmp_sctx->user, user))))
      {
        thread_info *thd_info= new thread_info;

        thd_info->thread_id=tmp->thread_id;
        thd_info->user= thd->strdup(tmp_sctx->user ? tmp_sctx->user :
                                    (tmp->system_thread ?
                                     "system user" : "unauthenticated user"));
	if (tmp->peer_port && (tmp_sctx->host || tmp_sctx->ip) &&
            thd->security_ctx->host_or_ip[0])
	{
	  if ((thd_info->host= thd->alloc(LIST_PROCESS_HOST_LEN+1)))
	    my_snprintf((char *) thd_info->host, LIST_PROCESS_HOST_LEN,
			"%s:%u", tmp_sctx->host_or_ip, tmp->peer_port);
	}
	else
	  thd_info->host= thd->strdup(tmp_sctx->host_or_ip[0] ? 
                                      tmp_sctx->host_or_ip : 
                                      tmp_sctx->host ? tmp_sctx->host : "");
        if ((thd_info->db=tmp->db))             // Safe test
          thd_info->db=thd->strdup(thd_info->db);
        thd_info->command=(int) tmp->command;
        if ((mysys_var= tmp->mysys_var))
          pthread_mutex_lock(&mysys_var->mutex);
        thd_info->proc_info= (char*) (tmp->killed == THD::KILL_CONNECTION? "Killed" : 0);
#ifndef EMBEDDED_LIBRARY
        thd_info->state_info= (char*) (tmp->locked ? "Locked" :
                                       tmp->net.reading_or_writing ?
                                       (tmp->net.reading_or_writing == 2 ?
                                        "Writing to net" :
                                        thd_info->command == COM_SLEEP ? "" :
                                        "Reading from net") :
                                       tmp->proc_info ? tmp->proc_info :
                                       tmp->mysys_var &&
                                       tmp->mysys_var->current_cond ?
                                       "Waiting on cond" : NullS);
#else
        thd_info->state_info= (char*)"Writing to net";
#endif
        if (mysys_var)
          pthread_mutex_unlock(&mysys_var->mutex);

#if !defined(DONT_USE_THR_ALARM) && ! defined(SCO)
        if (pthread_kill(tmp->real_id,0))
          tmp->proc_info="*** DEAD ***";        // This shouldn't happen
#endif
#ifdef EXTRA_DEBUG
        thd_info->start_time= tmp->time_after_lock;
#else
        thd_info->start_time= tmp->start_time;
#endif
        thd_info->query=0;
        if (tmp->query)
        {
	  /* 
            query_length is always set to 0 when we set query = NULL; see
	    the comment in sql_class.h why this prevents crashes in possible
            races with query_length
          */
          uint length= min(max_query_length, tmp->query_length);
          thd_info->query=(char*) thd->strmake(tmp->query,length);
        }
        thread_infos.append(thd_info);
      }
    }
  }
  VOID(pthread_mutex_unlock(&LOCK_thread_count));

  thread_info *thd_info;
  time_t now= time(0);
  while ((thd_info=thread_infos.get()))
  {
    protocol->prepare_for_resend();
    protocol->store((ulonglong) thd_info->thread_id);
    protocol->store(thd_info->user, system_charset_info);
    protocol->store(thd_info->host, system_charset_info);
    protocol->store(thd_info->db, system_charset_info);
    if (thd_info->proc_info)
      protocol->store(thd_info->proc_info, system_charset_info);
    else
      protocol->store(command_name[thd_info->command], system_charset_info);
    if (thd_info->start_time)
      protocol->store((uint32) (now - thd_info->start_time));
    else
      protocol->store_null();
    protocol->store(thd_info->state_info, system_charset_info);
    protocol->store(thd_info->query, system_charset_info);
    if (protocol->write())
      break; /* purecov: inspected */
  }
  send_eof(thd);
  DBUG_VOID_RETURN;
}

/*****************************************************************************
  Status functions
*****************************************************************************/


static bool show_status_array(THD *thd, const char *wild,
                              show_var_st *variables,
                              enum enum_var_type value_type,
                              struct system_status_var *status_var,
                              const char *prefix, TABLE *table)
{
  char buff[1024], *prefix_end;
  /* the variable name should not be longer then 80 characters */
  char name_buffer[80];
  int len;
  LEX_STRING null_lex_str;
  CHARSET_INFO *charset= system_charset_info;
  DBUG_ENTER("show_status_array");

  null_lex_str.str= 0;				// For sys_var->value_ptr()
  null_lex_str.length= 0;

  prefix_end=strnmov(name_buffer, prefix, sizeof(name_buffer)-1);
  len=name_buffer + sizeof(name_buffer) - prefix_end;

  for (; variables->name; variables++)
  {
    strnmov(prefix_end, variables->name, len);
    name_buffer[sizeof(name_buffer)-1]=0;       /* Safety */
    SHOW_TYPE show_type=variables->type;
    if (show_type == SHOW_VARS)
    {
      show_status_array(thd, wild, (show_var_st *) variables->value,
                        value_type, status_var, variables->name, table);
    }
    else
    {
      if (!(wild && wild[0] && wild_case_compare(system_charset_info,
                                                 name_buffer, wild)))
      {
        char *value=variables->value;
        const char *pos, *end;                  // We assign a lot of const's
        long nr;
        if (show_type == SHOW_SYS)
        {
          sys_var *var= ((sys_var *) value);
          show_type= var->show_type();
          value= (char*) var->value_ptr(thd, value_type, &null_lex_str);
          charset= var->charset(thd);
        }

        pos= end= buff;
        switch (show_type) {
        case SHOW_LONG_STATUS:
        case SHOW_LONG_CONST_STATUS:
          value= ((char *) status_var + (ulong) value);
          /* fall through */
        case SHOW_LONG:
        case SHOW_LONG_CONST:
          end= int10_to_str(*(long*) value, buff, 10);
          break;
        case SHOW_LONGLONG_STATUS:
          value= ((char *) status_var + (ulonglong) value);
        case SHOW_LONGLONG:
          end= longlong10_to_str(*(longlong*) value, buff, 10);
          break;
        case SHOW_HA_ROWS:
          end= longlong10_to_str((longlong) *(ha_rows*) value, buff, 10);
          break;
        case SHOW_BOOL:
          end= strmov(buff, *(bool*) value ? "ON" : "OFF");
          break;
        case SHOW_MY_BOOL:
          end= strmov(buff, *(my_bool*) value ? "ON" : "OFF");
          break;
        case SHOW_INT_CONST:
        case SHOW_INT:
          end= int10_to_str((long) *(uint32*) value, buff, 10);
          break;
        case SHOW_HAVE:
        {
          SHOW_COMP_OPTION tmp= *(SHOW_COMP_OPTION*) value;
          pos= show_comp_option_name[(int) tmp];
          end= strend(pos);
          break;
        }
        case SHOW_CHAR:
        {
          if (!(pos= value))
            pos= "";
          end= strend(pos);
          break;
        }
        case SHOW_STARTTIME:
          nr= (long) (thd->query_start() - server_start_time);
          end= int10_to_str(nr, buff, 10);
          break;
#ifdef HAVE_REPLICATION
        case SHOW_RPL_STATUS:
          end= strmov(buff, rpl_status_type[(int)rpl_status]);
          break;
        case SHOW_SLAVE_RUNNING:
        {
          pthread_mutex_lock(&LOCK_active_mi);
          end= strmov(buff, (active_mi && active_mi->slave_running &&
                             active_mi->rli.slave_running) ? "ON" : "OFF");
          pthread_mutex_unlock(&LOCK_active_mi);
          break;
        }
        case SHOW_SLAVE_RETRIED_TRANS:
        {
          /*
            TODO: in 5.1 with multimaster, have one such counter per line in
            SHOW SLAVE STATUS, and have the sum over all lines here.
          */
          pthread_mutex_lock(&LOCK_active_mi);
          if (active_mi)
          {
            pthread_mutex_lock(&active_mi->rli.data_lock);
            end= int10_to_str(active_mi->rli.retried_trans, buff, 10);
            pthread_mutex_unlock(&active_mi->rli.data_lock);
          }
          pthread_mutex_unlock(&LOCK_active_mi);
          break;
        }
        case SHOW_SLAVE_SKIP_ERRORS:
        {
          MY_BITMAP *bitmap= (MY_BITMAP *)value;
          if (!use_slave_mask || bitmap_is_clear_all(bitmap))
          {
            end= strmov(buff, "OFF");
          }
          else if (bitmap_is_set_all(bitmap))
          {
            end= strmov(buff, "ALL");
          }
          else
          {
            /* 10 is enough assuming errors are max 4 digits */
            int i;
            for (i= 1;
                 i < MAX_SLAVE_ERROR && (uint) (end-buff) < sizeof(buff)-10;
                 i++)
            {
              if (bitmap_is_set(bitmap, i))
              {
                end= int10_to_str(i, (char*) end, 10);
                *(char*) end++= ',';
              }
            }
            if (end != buff)
              end--;				// Remove last ','
            if (i < MAX_SLAVE_ERROR)
              end= strmov((char*) end, "...");  // Couldn't show all errors
          }
          break;
        }
#endif /* HAVE_REPLICATION */
        case SHOW_OPENTABLES:
          end= int10_to_str((long) cached_tables(), buff, 10);
          break;
        case SHOW_CHAR_PTR:
        {
          if (!(pos= *(char**) value))
            pos= "";
          end= strend(pos);
          break;
        }
        case SHOW_DOUBLE_STATUS:
        {
          value= ((char *) status_var + (ulong) value);
          end= buff + sprintf(buff, "%f", *(double*) value);
          break;
        }
#ifdef HAVE_OPENSSL
          /* First group - functions relying on CTX */
        case SHOW_SSL_CTX_SESS_ACCEPT:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_accept(ssl_acceptor_fd->
                                                        ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_ACCEPT_GOOD:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_accept_good(ssl_acceptor_fd->
                                                             ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_CONNECT_GOOD:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_connect_good(ssl_acceptor_fd->
                                                              ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_ACCEPT_RENEGOTIATE:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_accept_renegotiate(ssl_acceptor_fd->ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_CONNECT_RENEGOTIATE:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_connect_renegotiate(ssl_acceptor_fd-> ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_CB_HITS:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_cb_hits(ssl_acceptor_fd->
                                                         ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_HITS:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_hits(ssl_acceptor_fd->
                                                      ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_CACHE_FULL:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_cache_full(ssl_acceptor_fd->
                                                            ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_MISSES:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_misses(ssl_acceptor_fd->
                                                        ssl_context)),
                            buff, 10);
          break;
        case SHOW_SSL_CTX_SESS_TIMEOUTS:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_timeouts(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_SESS_NUMBER:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_number(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_SESS_CONNECT:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_connect(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_SESS_GET_CACHE_SIZE:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_sess_get_cache_size(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_GET_VERIFY_MODE:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_get_verify_mode(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_GET_VERIFY_DEPTH:
          end= int10_to_str((long) (!ssl_acceptor_fd ? 0 :
                                    SSL_CTX_get_verify_depth(ssl_acceptor_fd->ssl_context)),
                            buff,10);
          break;
        case SHOW_SSL_CTX_GET_SESSION_CACHE_MODE:
          if (!ssl_acceptor_fd)
          {
            pos= "NONE";
            end= pos+4;
            break;
          }
          switch (SSL_CTX_get_session_cache_mode(ssl_acceptor_fd->ssl_context))
          {
          case SSL_SESS_CACHE_OFF:
            pos= "OFF";
            break;
          case SSL_SESS_CACHE_CLIENT:
            pos= "CLIENT";
            break;
          case SSL_SESS_CACHE_SERVER:
            pos= "SERVER";
            break;
          case SSL_SESS_CACHE_BOTH:
            pos= "BOTH";
            break;
          case SSL_SESS_CACHE_NO_AUTO_CLEAR:
            pos= "NO_AUTO_CLEAR";
            break;
          case SSL_SESS_CACHE_NO_INTERNAL_LOOKUP:
            pos= "NO_INTERNAL_LOOKUP";
            break;
          default:
            pos= "Unknown";
            break;
          }
          end= strend(pos);
          break;
          /* First group - functions relying on SSL */
        case SHOW_SSL_GET_VERSION:
          pos= (thd->net.vio->ssl_arg ?
                SSL_get_version((SSL*) thd->net.vio->ssl_arg) : "");
          end= strend(pos);
          break;
        case SHOW_SSL_SESSION_REUSED:
          end= int10_to_str((long) (thd->net.vio->ssl_arg ?
                                    SSL_session_reused((SSL*) thd->net.vio->
                                                       ssl_arg) :
                                    0),
                            buff, 10);
          break;
        case SHOW_SSL_GET_DEFAULT_TIMEOUT:
          end= int10_to_str((long) (thd->net.vio->ssl_arg ?
                                    SSL_get_default_timeout((SSL*) thd->net.vio->
                                                            ssl_arg) :
                                    0),
                            buff, 10);
          break;
        case SHOW_SSL_GET_VERIFY_MODE:
          end= int10_to_str((long) (thd->net.vio->ssl_arg ?
                                    SSL_get_verify_mode((SSL*) thd->net.vio->
                                                        ssl_arg):
                                    0),
                            buff, 10);
          break;
        case SHOW_SSL_GET_VERIFY_DEPTH:
          end= int10_to_str((long) (thd->net.vio->ssl_arg ?
                                    SSL_get_verify_depth((SSL*) thd->net.vio->
                                                         ssl_arg):
                                    0),
                            buff, 10);
          break;
        case SHOW_SSL_GET_CIPHER:
          pos= (thd->net.vio->ssl_arg ?
                SSL_get_cipher((SSL*) thd->net.vio->ssl_arg) : "" );
          end= strend(pos);
          break;
        case SHOW_SSL_GET_CIPHER_LIST:
          if (thd->net.vio->ssl_arg)
          {
            char *to= buff;
            char *buff_end= buff + sizeof(buff);
            for (int i= 0; to < buff_end; i++)
            {
              const char *p= SSL_get_cipher_list((SSL*) thd->net.vio->ssl_arg,i);
              if (p == NULL)
                break;
              to= strnmov(to, p, buff_end-to-1);
              *to++= ':';
            }
            if (to != buff)
              to--;				// Remove last ':'
            end= to;
          }
          break;

#endif /* HAVE_OPENSSL */
        case SHOW_KEY_CACHE_LONG:
        case SHOW_KEY_CACHE_CONST_LONG:
          value= (value-(char*) &dflt_key_cache_var)+ (char*) dflt_key_cache;
          end= int10_to_str(*(long*) value, buff, 10);
          break;
        case SHOW_KEY_CACHE_LONGLONG:
	  value= (value-(char*) &dflt_key_cache_var)+ (char*) dflt_key_cache;
	  end= longlong10_to_str(*(longlong*) value, buff, 10);
	  break;
        case SHOW_NET_COMPRESSION:
          end= strmov(buff, thd->net.compress ? "ON" : "OFF");
          break;
        case SHOW_UNDEF:				// Show never happen
        case SHOW_SYS:
          break;					// Return empty string
        default:
          break;
        }
        restore_record(table, s->default_values);
        table->field[0]->store(name_buffer, strlen(name_buffer),
                               system_charset_info);
        table->field[1]->store(pos, (uint32) (end - pos), charset);
        if (schema_table_store_record(thd, table))
          DBUG_RETURN(TRUE);
      }
    }
  }

  DBUG_RETURN(FALSE);
}


/* collect status for all running threads */

void calc_sum_of_all_status(STATUS_VAR *to)
{
  DBUG_ENTER("calc_sum_of_all_status");

  /* Ensure that thread id not killed during loop */
  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For unlink from list

  I_List_iterator<THD> it(threads);
  THD *tmp;
  
  /* Get global values as base */
  *to= global_status_var;
  
  /* Add to this status from existing threads */
  while ((tmp= it++))
    add_to_status(to, &tmp->status_var);
  
  VOID(pthread_mutex_unlock(&LOCK_thread_count));
  DBUG_VOID_RETURN;
}


LEX_STRING *make_lex_string(THD *thd, LEX_STRING *lex_str,
                            const char* str, uint length,
                            bool allocate_lex_string)
{
  MEM_ROOT *mem= thd->mem_root;
  if (allocate_lex_string)
    if (!(lex_str= (LEX_STRING *)thd->alloc(sizeof(LEX_STRING))))
      return 0;
  lex_str->str= strmake_root(mem, str, length);
  lex_str->length= length;
  return lex_str;
}


/* INFORMATION_SCHEMA name */
LEX_STRING INFORMATION_SCHEMA_NAME=
  { (char *) STRING_WITH_LEN("information_schema") };

/* This is only used internally, but we need it here as a forward reference */
extern ST_SCHEMA_TABLE schema_tables[];

typedef struct st_index_field_values
{
  const char *db_value, *table_value;
} INDEX_FIELD_VALUES;


/*
  Store record to I_S table, convert HEAP table
  to MyISAM if necessary

  SYNOPSIS
    schema_table_store_record()
    thd                   thread handler
    table                 Information schema table to be updated

  RETURN
    0	                  success
    1	                  error
*/

static bool schema_table_store_record(THD *thd, TABLE *table)
{
  int error;
  if ((error= table->file->write_row(table->record[0])))
  {
    if (create_myisam_from_heap(thd, table, 
                                table->pos_in_table_list->schema_table_param,
                                error, 0))
      return 1;
  }
  return 0;
}


void get_index_field_values(LEX *lex, INDEX_FIELD_VALUES *index_field_values)
{
  const char *wild= lex->wild ? lex->wild->ptr() : NullS;
  switch (lex->orig_sql_command) {
  case SQLCOM_SHOW_DATABASES:
    index_field_values->db_value= wild;
    break;
  case SQLCOM_SHOW_TABLES:
  case SQLCOM_SHOW_TABLE_STATUS:
  case SQLCOM_SHOW_TRIGGERS:
    index_field_values->db_value= lex->select_lex.db;
    index_field_values->table_value= wild;
    break;
  default:
    index_field_values->db_value= NullS;
    index_field_values->table_value= NullS;
    break;
  }
}


int make_table_list(THD *thd, SELECT_LEX *sel,
                    char *db, char *table)
{
  Table_ident *table_ident;
  LEX_STRING ident_db, ident_table;
  ident_db.str= db; 
  ident_db.length= strlen(db);
  ident_table.str= table;
  ident_table.length= strlen(table);
  table_ident= new Table_ident(thd, ident_db, ident_table, 1);
  sel->init_query();
  if (!sel->add_table_to_list(thd, table_ident, 0, 0, TL_READ,
                             (List<String> *) 0, (List<String> *) 0))
    return 1;
  return 0;
}


bool uses_only_table_name_fields(Item *item, TABLE_LIST *table)
{
  if (item->type() == Item::FUNC_ITEM)
  {
    Item_func *item_func= (Item_func*)item;
    for (uint i=0; i<item_func->argument_count(); i++)
    {
      if (!uses_only_table_name_fields(item_func->arguments()[i], table))
        return 0;
    }
  }
  else if (item->type() == Item::FIELD_ITEM)
  {
    Item_field *item_field= (Item_field*)item;
    CHARSET_INFO *cs= system_charset_info;
    ST_SCHEMA_TABLE *schema_table= table->schema_table;
    ST_FIELD_INFO *field_info= schema_table->fields_info;
    const char *field_name1= schema_table->idx_field1 >= 0 ? field_info[schema_table->idx_field1].field_name : "";
    const char *field_name2= schema_table->idx_field2 >= 0 ? field_info[schema_table->idx_field2].field_name : "";
    if (table->table != item_field->field->table ||
        (cs->coll->strnncollsp(cs, (uchar *) field_name1, strlen(field_name1),
                               (uchar *) item_field->field_name, 
                               strlen(item_field->field_name), 0) &&
         cs->coll->strnncollsp(cs, (uchar *) field_name2, strlen(field_name2),
                               (uchar *) item_field->field_name, 
                               strlen(item_field->field_name), 0)))
      return 0;
  }
  else if (item->type() == Item::REF_ITEM)
    return uses_only_table_name_fields(item->real_item(), table);
  if (item->type() == Item::SUBSELECT_ITEM &&
      !item->const_item())
    return 0;

  return 1;
}


static COND * make_cond_for_info_schema(COND *cond, TABLE_LIST *table)
{
  if (!cond)
    return (COND*) 0;
  if (cond->type() == Item::COND_ITEM)
  {
    if (((Item_cond*) cond)->functype() == Item_func::COND_AND_FUNC)
    {
      /* Create new top level AND item */
      Item_cond_and *new_cond=new Item_cond_and;
      if (!new_cond)
	return (COND*) 0;
      List_iterator<Item> li(*((Item_cond*) cond)->argument_list());
      Item *item;
      while ((item=li++))
      {
	Item *fix= make_cond_for_info_schema(item, table);
	if (fix)
	  new_cond->argument_list()->push_back(fix);
      }
      switch (new_cond->argument_list()->elements) {
      case 0:
	return (COND*) 0;
      case 1:
	return new_cond->argument_list()->head();
      default:
	new_cond->quick_fix_field();
	return new_cond;
      }
    }
    else
    {						// Or list
      Item_cond_or *new_cond=new Item_cond_or;
      if (!new_cond)
	return (COND*) 0;
      List_iterator<Item> li(*((Item_cond*) cond)->argument_list());
      Item *item;
      while ((item=li++))
      {
	Item *fix=make_cond_for_info_schema(item, table);
	if (!fix)
	  return (COND*) 0;
	new_cond->argument_list()->push_back(fix);
      }
      new_cond->quick_fix_field();
      new_cond->top_level_item();
      return new_cond;
    }
  }

  if (!uses_only_table_name_fields(cond, table))
    return (COND*) 0;
  return cond;
}


enum enum_schema_tables get_schema_table_idx(ST_SCHEMA_TABLE *schema_table)
{
  return (enum enum_schema_tables) (schema_table - &schema_tables[0]);
}


/*
  Create db names list. Information schema name always is first in list

  SYNOPSIS
    make_db_list()
    thd                   thread handler
    files                 list of db names
    wild                  wild string
    idx_field_vals        idx_field_vals->db_name contains db name or
                          wild string
    with_i_schema         returns 1 if we added 'IS' name to list
                          otherwise returns 0
    is_wild_value         if value is 1 then idx_field_vals->db_name is
                          wild string otherwise it's db name; 

  RETURN
    zero                  success
    non-zero              error
*/

int make_db_list(THD *thd, List<char> *files,
                 INDEX_FIELD_VALUES *idx_field_vals,
                 bool *with_i_schema, bool is_wild_value)
{
  LEX *lex= thd->lex;
  *with_i_schema= 0;
  get_index_field_values(lex, idx_field_vals);
  if (is_wild_value)
  {
    /*
      This part of code is only for SHOW DATABASES command.
      idx_field_vals->db_value can be 0 when we don't use
      LIKE clause (see also get_index_field_values() function)
    */
    if (!idx_field_vals->db_value ||
        !wild_case_compare(system_charset_info, 
                           INFORMATION_SCHEMA_NAME.str,
                           idx_field_vals->db_value))
    {
      *with_i_schema= 1;
      if (files->push_back(thd->strdup(INFORMATION_SCHEMA_NAME.str)))
        return 1;
    }
    return (find_files(thd, files, NullS, mysql_data_home,
                       idx_field_vals->db_value, 1) != FIND_FILES_OK);
  }

  /*
    This part of code is for SHOW TABLES, SHOW TABLE STATUS commands.
    idx_field_vals->db_value can't be 0 (see get_index_field_values()
    function). lex->orig_sql_command can be not equal to SQLCOM_END
    only in case of executing of SHOW commands.
  */
  if (lex->orig_sql_command != SQLCOM_END)
  {
    if (!my_strcasecmp(system_charset_info, INFORMATION_SCHEMA_NAME.str,
                       idx_field_vals->db_value))
    {
      *with_i_schema= 1;
      return files->push_back(thd->strdup(INFORMATION_SCHEMA_NAME.str));
    }
    return files->push_back(thd->strdup(idx_field_vals->db_value));
  }

  /*
    Create list of existing databases. It is used in case
    of select from information schema table
  */
  if (files->push_back(thd->strdup(INFORMATION_SCHEMA_NAME.str)))
    return 1;
  *with_i_schema= 1;
  return (find_files(thd, files, NullS,
                     mysql_data_home, NullS, 1) != FIND_FILES_OK);
}


int schema_tables_add(THD *thd, List<char> *files, const char *wild)
{
  ST_SCHEMA_TABLE *tmp_schema_table= schema_tables;
  for (; tmp_schema_table->table_name; tmp_schema_table++)
  {
    if (tmp_schema_table->hidden)
      continue;
    if (wild)
    {
      if (lower_case_table_names)
      {
        if (wild_case_compare(files_charset_info,
                              tmp_schema_table->table_name,
                              wild))
          continue;
      }
      else if (wild_compare(tmp_schema_table->table_name, wild, 0))
        continue;
    }
    if (files->push_back(thd->strdup(tmp_schema_table->table_name)))
      return 1;
  }
  return 0;
}


int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond)
{
  LEX *lex= thd->lex;
  TABLE *table= tables->table;
  SELECT_LEX *select_lex= &lex->select_lex;
  SELECT_LEX *old_all_select_lex= lex->all_selects_list;
  enum_sql_command save_sql_command= lex->sql_command;
  SELECT_LEX *lsel= tables->schema_select_lex;
  ST_SCHEMA_TABLE *schema_table= tables->schema_table;
  SELECT_LEX sel;
  INDEX_FIELD_VALUES idx_field_vals;
  char path[FN_REFLEN], *end, *base_name, *orig_base_name, *file_name;
  uint len;
  bool with_i_schema;
  enum enum_schema_tables schema_table_idx;
  List<char> bases;
  List_iterator_fast<char> it(bases);
  COND *partial_cond;
  uint derived_tables= lex->derived_tables; 
  int error= 1;
  db_type not_used;
  Open_tables_state open_tables_state_backup;
  bool save_view_prepare_mode= lex->view_prepare_mode;
  Query_tables_list query_tables_list_backup;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  Security_context *sctx= thd->security_ctx;
#endif
  DBUG_ENTER("get_all_tables");

  LINT_INIT(end);
  LINT_INIT(len);

  lex->view_prepare_mode= TRUE;
  lex->reset_n_backup_query_tables_list(&query_tables_list_backup);

  /*
    We should not introduce deadlocks even if we already have some
    tables open and locked, since we won't lock tables which we will
    open and will ignore possible name-locks for these tables.
  */
  thd->reset_n_backup_open_tables_state(&open_tables_state_backup);

  if (lsel && lsel->table_list.first)
  {
    TABLE_LIST *show_table_list= (TABLE_LIST*) lsel->table_list.first;
    bool res;

    lex->all_selects_list= lsel;
    /*
      Restore thd->temporary_tables to be able to process
      temporary tables(only for 'show index' & 'show columns').
      This should be changed when processing of temporary tables for
      I_S tables will be done.
    */
    thd->temporary_tables= open_tables_state_backup.temporary_tables;
    /*
      Let us set fake sql_command so views won't try to merge
      themselves into main statement. If we don't do this,
      SELECT * from information_schema.xxxx will cause problems.
      SQLCOM_SHOW_FIELDS is used because it satisfies 'only_view_structure()' 
    */
    lex->sql_command= SQLCOM_SHOW_FIELDS;
    res= open_normal_and_derived_tables(thd, show_table_list,
                                        MYSQL_LOCK_IGNORE_FLUSH);
    lex->sql_command= save_sql_command;
    /*
      get_all_tables() returns 1 on failure and 0 on success thus
      return only these and not the result code of ::process_table()

      We should use show_table_list->alias instead of 
      show_table_list->table_name because table_name
      could be changed during opening of I_S tables. It's safe
      to use alias because alias contains original table name 
      in this case(this part of code is used only for 
      'show columns' & 'show statistics' commands).
    */
    error= test(schema_table->process_table(thd, show_table_list,
                                            table, res, 
                                            (show_table_list->view ?
                                             show_table_list->view_db.str :
                                             show_table_list->db),
                                            show_table_list->alias));
    thd->temporary_tables= 0;
    close_tables_for_reopen(thd, &show_table_list);
    goto err;
  }

  schema_table_idx= get_schema_table_idx(schema_table);

  if (make_db_list(thd, &bases, &idx_field_vals,
                   &with_i_schema, 0))
    goto err;

  partial_cond= make_cond_for_info_schema(cond, tables);
  it.rewind(); /* To get access to new elements in basis list */
  while ((orig_base_name= base_name= it++) ||
	 /*
	   generate error for non existing database.
	   (to save old behaviour for SHOW TABLES FROM db)
	 */
	 ((lex->orig_sql_command == SQLCOM_SHOW_TABLES ||
           lex->orig_sql_command == SQLCOM_SHOW_TABLE_STATUS) &&
	  (base_name= select_lex->db) && !bases.elements))
  {
#ifndef NO_EMBEDDED_ACCESS_CHECKS
    if (!check_access(thd,SELECT_ACL, base_name, 
                      &thd->col_access, 0, 1, with_i_schema) ||
        sctx->master_access & (DB_ACLS | SHOW_DB_ACL) ||
	acl_get(sctx->host, sctx->ip, sctx->priv_user, base_name,0) ||
	(grant_option && !check_grant_db(thd, base_name)))
#endif
    {
      List<char> files;
      if (with_i_schema)                      // information schema table names
      {
        if (schema_tables_add(thd, &files, idx_field_vals.table_value))
          goto err;
      }
      else
      {
        strxmov(path, mysql_data_home, "/", base_name, NullS);
        end= path + (len= unpack_dirname(path,path));
        len= FN_LEN - len;
        find_files_result res= find_files(thd, &files, base_name, 
                                          path, idx_field_vals.table_value, 0);
        if (res != FIND_FILES_OK)
        {
          /*
            Downgrade errors about problems with database directory to
            warnings if this is not a 'SHOW' command.  Another thread
            may have dropped database, and we may still have a name
            for that directory.
          */
          if (res == FIND_FILES_DIR && lex->orig_sql_command == SQLCOM_END)
          {
            push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                         thd->net.last_errno, thd->net.last_error);
            thd->clear_error();
            continue;
          }
          else
          {
            goto err;
          }
        }
        if (lower_case_table_names)
          orig_base_name= thd->strdup(base_name);
      }

      List_iterator_fast<char> it_files(files);
      while ((file_name= it_files++))
      {
	restore_record(table, s->default_values);
        table->field[schema_table->idx_field1]->
          store(base_name, strlen(base_name), system_charset_info);
        table->field[schema_table->idx_field2]->
          store(file_name, strlen(file_name),system_charset_info);
        if (!partial_cond || partial_cond->val_int())
        {
          if (schema_table_idx == SCH_TABLE_NAMES)
          {
            if (lex->verbose || lex->orig_sql_command == SQLCOM_END)
            {
              if (with_i_schema)
              {
                table->field[3]->store(STRING_WITH_LEN("SYSTEM VIEW"),
                                       system_charset_info);
              }
              else
              {
                my_snprintf(end, len, "/%s%s", file_name, reg_ext);
                switch (mysql_frm_type(thd, path, &not_used)) {
                case FRMTYPE_ERROR:
                  table->field[3]->store(STRING_WITH_LEN("ERROR"),
                                         system_charset_info);
                  break;
                case FRMTYPE_TABLE:
                  table->field[3]->store(STRING_WITH_LEN("BASE TABLE"),
                                         system_charset_info);
                  break;
                case FRMTYPE_VIEW:
                  table->field[3]->store(STRING_WITH_LEN("VIEW"),
                                         system_charset_info);
                  break;
                default:
                  DBUG_ASSERT(0);
                }
              }
            }
            if (schema_table_store_record(thd, table))
              goto err;
          }
          else
          {
            int res;
            /*
              Set the parent lex of 'sel' because it is needed by sel.init_query()
              which is called inside make_table_list.
            */
            sel.parent_lex= lex;
            if (make_table_list(thd, &sel, base_name, file_name))
              goto err;
            TABLE_LIST *show_table_list= (TABLE_LIST*) sel.table_list.first;
            lex->all_selects_list= &sel;
            lex->derived_tables= 0;
            lex->sql_command= SQLCOM_SHOW_FIELDS;
            res= open_normal_and_derived_tables(thd, show_table_list,
                                                MYSQL_LOCK_IGNORE_FLUSH);
            lex->sql_command= save_sql_command;
            /* 
              They can drop table after table names list creation and
              before table opening. We open non existing table and 
              get ER_NO_SUCH_TABLE error. In this case we do not store
              the record into I_S table and clear error.
            */
            if (thd->net.last_errno == ER_NO_SUCH_TABLE)
            {
              res= 0;
              thd->clear_error();
            }
            else
            {
              /*
                We should use show_table_list->alias instead of 
                show_table_list->table_name because table_name
                could be changed during opening of I_S tables. It's safe
                to use alias because alias contains original table name 
                in this case.
              */
              res= schema_table->process_table(thd, show_table_list, table,
                                               res, orig_base_name,
                                               show_table_list->alias);
              close_tables_for_reopen(thd, &show_table_list);
              DBUG_ASSERT(!lex->query_tables_own_last);
            }
            if (res)
              goto err;
          }
        }
      }
      /*
        If we have information schema its always the first table and only
        the first table. Reset for other tables.
      */
      with_i_schema= 0;
    }
  }

  error= 0;
err:
  thd->restore_backup_open_tables_state(&open_tables_state_backup);
  lex->restore_backup_query_tables_list(&query_tables_list_backup);
  lex->derived_tables= derived_tables;
  lex->all_selects_list= old_all_select_lex;
  lex->view_prepare_mode= save_view_prepare_mode;
  lex->sql_command= save_sql_command;
  DBUG_RETURN(error);
}


bool store_schema_shemata(THD* thd, TABLE *table, const char *db_name,
                          CHARSET_INFO *cs)
{
  restore_record(table, s->default_values);
  table->field[1]->store(db_name, strlen(db_name), system_charset_info);
  table->field[2]->store(cs->csname, strlen(cs->csname), system_charset_info);
  table->field[3]->store(cs->name, strlen(cs->name), system_charset_info);
  return schema_table_store_record(thd, table);
}


int fill_schema_shemata(THD *thd, TABLE_LIST *tables, COND *cond)
{
  /*
    TODO: fill_schema_shemata() is called when new client is connected.
    Returning error status in this case leads to client hangup.
  */

  INDEX_FIELD_VALUES idx_field_vals;
  List<char> files;
  char *file_name;
  bool with_i_schema;
  HA_CREATE_INFO create;
  TABLE *table= tables->table;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  Security_context *sctx= thd->security_ctx;
#endif
  DBUG_ENTER("fill_schema_shemata");

  if (make_db_list(thd, &files, &idx_field_vals,
                   &with_i_schema, 1))
    DBUG_RETURN(1);

  List_iterator_fast<char> it(files);
  while ((file_name=it++))
  {
    if (with_i_schema)       // information schema name is always first in list
    {
      if (store_schema_shemata(thd, table, file_name,
                               system_charset_info))
        DBUG_RETURN(1);
      with_i_schema= 0;
      continue;
    }
#ifndef NO_EMBEDDED_ACCESS_CHECKS
    if (sctx->master_access & (DB_ACLS | SHOW_DB_ACL) ||
	acl_get(sctx->host, sctx->ip, sctx->priv_user, file_name,0) ||
	(grant_option && !check_grant_db(thd, file_name)))
#endif
    {
      load_db_opt_by_name(thd, file_name, &create);

      if (store_schema_shemata(thd, table, file_name,
                               create.default_table_charset))
        DBUG_RETURN(1);
    }
  }
  DBUG_RETURN(0);
}


static int get_schema_tables_record(THD *thd, TABLE_LIST *tables,
				    TABLE *table, bool res,
				    const char *base_name,
				    const char *file_name)
{
  const char *tmp_buff;
  MYSQL_TIME time;
  CHARSET_INFO *cs= system_charset_info;
  DBUG_ENTER("get_schema_tables_record");

  restore_record(table, s->default_values);
  table->field[1]->store(base_name, strlen(base_name), cs);
  table->field[2]->store(file_name, strlen(file_name), cs);
  if (res)
  {
    /*
      there was errors during opening tables
    */
    const char *error= thd->net.last_error;
    if (tables->view)
      table->field[3]->store(STRING_WITH_LEN("VIEW"), cs);
    else if (tables->schema_table)
      table->field[3]->store(STRING_WITH_LEN("SYSTEM VIEW"), cs);
    else
      table->field[3]->store(STRING_WITH_LEN("BASE TABLE"), cs);
    table->field[20]->store(error, strlen(error), cs);
    thd->clear_error();
  }
  else if (tables->view)
  {
    table->field[3]->store(STRING_WITH_LEN("VIEW"), cs);
    table->field[20]->store(STRING_WITH_LEN("VIEW"), cs);
  }
  else
  {
    TABLE *show_table= tables->table;
    TABLE_SHARE *share= show_table->s;
    handler *file= show_table->file;

    file->info(HA_STATUS_VARIABLE | HA_STATUS_TIME | HA_STATUS_AUTO |
               HA_STATUS_NO_LOCK);
    if (share->tmp_table == SYSTEM_TMP_TABLE)
      table->field[3]->store(STRING_WITH_LEN("SYSTEM VIEW"), cs);
    else if (share->tmp_table)
      table->field[3]->store(STRING_WITH_LEN("LOCAL TEMPORARY"), cs);
    else
      table->field[3]->store(STRING_WITH_LEN("BASE TABLE"), cs);

    for (int i= 4; i < 20; i++)
    {
      if (i == 7 || (i > 12 && i < 17) || i == 18)
        continue;
      table->field[i]->set_notnull();
    }
    tmp_buff= file->table_type();
    table->field[4]->store(tmp_buff, strlen(tmp_buff), cs);
    table->field[5]->store((longlong) share->frm_version, TRUE);
    enum row_type row_type = file->get_row_type();
    switch (row_type) {
    case ROW_TYPE_NOT_USED:
    case ROW_TYPE_DEFAULT:
      tmp_buff= ((share->db_options_in_use &
		  HA_OPTION_COMPRESS_RECORD) ? "Compressed" :
		 (share->db_options_in_use & HA_OPTION_PACK_RECORD) ?
		 "Dynamic" : "Fixed");
      break;
    case ROW_TYPE_FIXED:
      tmp_buff= "Fixed";
      break;
    case ROW_TYPE_DYNAMIC:
      tmp_buff= "Dynamic";
      break;
    case ROW_TYPE_COMPRESSED:
      tmp_buff= "Compressed";
      break;
    case ROW_TYPE_REDUNDANT:
      tmp_buff= "Redundant";
      break;
    case ROW_TYPE_COMPACT:
      tmp_buff= "Compact";
      break;
    }
    table->field[6]->store(tmp_buff, strlen(tmp_buff), cs);
    if (!tables->schema_table)
    {
      table->field[7]->store((longlong) file->records, TRUE);
      table->field[7]->set_notnull();
    }
    table->field[8]->store((longlong) file->mean_rec_length, TRUE);
    table->field[9]->store((longlong) file->data_file_length, TRUE);
    if (file->max_data_file_length)
    {
      table->field[10]->store((longlong) file->max_data_file_length, TRUE);
    }
    table->field[11]->store((longlong) file->index_file_length, TRUE);
    table->field[12]->store((longlong) file->delete_length, TRUE);
    if (show_table->found_next_number_field)
    {
      table->field[13]->store((longlong) file->auto_increment_value, TRUE);
      table->field[13]->set_notnull();
    }
    if (file->create_time)
    {
      thd->variables.time_zone->gmt_sec_to_TIME(&time,
                                                (my_time_t) file->create_time);
      table->field[14]->store_time(&time, MYSQL_TIMESTAMP_DATETIME);
      table->field[14]->set_notnull();
    }
    if (file->update_time)
    {
      thd->variables.time_zone->gmt_sec_to_TIME(&time,
                                                (my_time_t) file->update_time);
      table->field[15]->store_time(&time, MYSQL_TIMESTAMP_DATETIME);
      table->field[15]->set_notnull();
    }
    if (file->check_time)
    {
      thd->variables.time_zone->gmt_sec_to_TIME(&time,
                                                (my_time_t) file->check_time);
      table->field[16]->store_time(&time, MYSQL_TIMESTAMP_DATETIME);
      table->field[16]->set_notnull();
    }
    tmp_buff= (share->table_charset ?
               share->table_charset->name : "default");
    table->field[17]->store(tmp_buff, strlen(tmp_buff), cs);
    if (file->table_flags() & (ulong) HA_HAS_CHECKSUM)
    {
      table->field[18]->store((longlong) file->checksum(), TRUE);
      table->field[18]->set_notnull();
    }

    char option_buff[350],*ptr;
    ptr=option_buff;
    if (share->min_rows)
    {
      ptr=strmov(ptr," min_rows=");
      ptr=longlong10_to_str(share->min_rows,ptr,10);
    }
    if (share->max_rows)
    {
      ptr=strmov(ptr," max_rows=");
      ptr=longlong10_to_str(share->max_rows,ptr,10);
    }
    if (share->avg_row_length)
    {
      ptr=strmov(ptr," avg_row_length=");
      ptr=longlong10_to_str(share->avg_row_length,ptr,10);
    }
    if (share->db_create_options & HA_OPTION_PACK_KEYS)
      ptr=strmov(ptr," pack_keys=1");
    if (share->db_create_options & HA_OPTION_NO_PACK_KEYS)
      ptr=strmov(ptr," pack_keys=0");
    if (share->db_create_options & HA_OPTION_CHECKSUM)
      ptr=strmov(ptr," checksum=1");
    if (share->db_create_options & HA_OPTION_DELAY_KEY_WRITE)
      ptr=strmov(ptr," delay_key_write=1");
    if (share->row_type != ROW_TYPE_DEFAULT)
      ptr=strxmov(ptr, " row_format=", 
                  ha_row_type[(uint) share->row_type],
                  NullS);
    if (file->raid_type)
    {
      char buff[100];
      my_snprintf(buff,sizeof(buff),
                  " raid_type=%s raid_chunks=%d raid_chunksize=%ld",
                  my_raid_type(file->raid_type), file->raid_chunks,
                  file->raid_chunksize/RAID_BLOCK_SIZE);
      ptr=strmov(ptr,buff);
    }
    table->field[19]->store(option_buff+1,
                            (ptr == option_buff ? 0 : 
                             (uint) (ptr-option_buff)-1), cs);
    {
      char *comment;
      comment= show_table->file->update_table_comment(share->comment.str);
      if (comment)
      {
        table->field[20]->store(comment,
                                (comment == share->comment.str ?
                                 share->comment.length : 
                                 strlen(comment)), cs);
        if (comment != share->comment.str)
          my_free(comment, MYF(0));
      }
    }
  }
  DBUG_RETURN(schema_table_store_record(thd, table));
}


static int get_schema_column_record(THD *thd, TABLE_LIST *tables,
				    TABLE *table, bool res,
				    const char *base_name,
				    const char *file_name)
{
  LEX *lex= thd->lex;
  const char *wild= lex->wild ? lex->wild->ptr() : NullS;
  CHARSET_INFO *cs= system_charset_info;
  TABLE *show_table;
  handler *file;
  Field **ptr,*field;
  int count;
  uint base_name_length, file_name_length;
  DBUG_ENTER("get_schema_column_record");

  if (res)
  {
    if (lex->orig_sql_command != SQLCOM_SHOW_FIELDS)
    {
      /*
        I.e. we are in SELECT FROM INFORMATION_SCHEMA.COLUMS
        rather than in SHOW COLUMNS
      */ 
      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                   thd->net.last_errno, thd->net.last_error);
      thd->clear_error();
      res= 0;
    }
    DBUG_RETURN(res);
  }

  show_table= tables->table;
  file= show_table->file;
  count= 0;
  file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK);
  restore_record(show_table, s->default_values);
  base_name_length= strlen(base_name);
  file_name_length= strlen(file_name);

  for (ptr=show_table->field; (field= *ptr) ; ptr++)
  {
    const char *tmp_buff;
    byte *pos;
    bool is_blob;
    uint flags=field->flags;
    char tmp[MAX_FIELD_WIDTH];
    String type(tmp,sizeof(tmp), system_charset_info);
    char *end;
    int decimals, field_length;

    if (wild && wild[0] &&
        wild_case_compare(system_charset_info, field->field_name,wild))
      continue;

    flags= field->flags;
    count++;
    /* Get default row, with all NULL fields set to NULL */
    restore_record(table, s->default_values);

#ifndef NO_EMBEDDED_ACCESS_CHECKS
    uint col_access;
    check_access(thd,SELECT_ACL | EXTRA_ACL, base_name,
                 &tables->grant.privilege, 0, 0, test(tables->schema_table));
    col_access= get_column_grant(thd, &tables->grant, 
                                 base_name, file_name,
                                 field->field_name) & COL_ACLS;
    if (!tables->schema_table && !col_access)
      continue;
    end= tmp;
    for (uint bitnr=0; col_access ; col_access>>=1,bitnr++)
    {
      if (col_access & 1)
      {
        *end++=',';
        end=strmov(end,grant_types.type_names[bitnr]);
      }
    }
    table->field[17]->store(tmp+1,end == tmp ? 0 : (uint) (end-tmp-1), cs);

#endif
    table->field[1]->store(base_name, base_name_length, cs);
    table->field[2]->store(file_name, file_name_length, cs);
    table->field[3]->store(field->field_name, strlen(field->field_name),
                           cs);
    table->field[4]->store((longlong) count, TRUE);
    field->sql_type(type);
    table->field[14]->store(type.ptr(), type.length(), cs);		
    tmp_buff= strchr(type.ptr(), '(');
    table->field[7]->store(type.ptr(),
                           (tmp_buff ? tmp_buff - type.ptr() :
                            type.length()), cs);

    if (get_field_default_value(thd, show_table, field, &type, 0))
    {
      table->field[5]->store(type.ptr(), type.length(), cs);
      table->field[5]->set_notnull();
    }

    pos=(byte*) ((flags & NOT_NULL_FLAG) ?  "NO" : "YES");
    table->field[6]->store((const char*) pos,
                           strlen((const char*) pos), cs);
    is_blob= (field->type() == FIELD_TYPE_BLOB);
    if (field->has_charset() || is_blob ||
        field->real_type() == MYSQL_TYPE_VARCHAR ||  // For varbinary type
        field->real_type() == MYSQL_TYPE_STRING)     // For binary type
    {
      uint32 octet_max_length= field->max_display_length();
      if (is_blob && octet_max_length != (uint32) 4294967295U)
        octet_max_length /= field->charset()->mbmaxlen;
      longlong char_max_len= is_blob ? 
        (longlong) octet_max_length / field->charset()->mbminlen :
        (longlong) octet_max_length / field->charset()->mbmaxlen;
      table->field[8]->store(char_max_len, TRUE);
      table->field[8]->set_notnull();
      table->field[9]->store((longlong) octet_max_length, TRUE);
      table->field[9]->set_notnull();
    }

    /*
      Calculate field_length and decimals.
      They are set to -1 if they should not be set (we should return NULL)
    */

    decimals= field->decimals();
    switch (field->type()) {
    case FIELD_TYPE_NEWDECIMAL:
      field_length= ((Field_new_decimal*) field)->precision;
      break;
    case FIELD_TYPE_DECIMAL:
      field_length= field->field_length - (decimals  ? 2 : 1);
      break;
    case FIELD_TYPE_TINY:
    case FIELD_TYPE_SHORT:
    case FIELD_TYPE_LONG:
    case FIELD_TYPE_LONGLONG:
    case FIELD_TYPE_INT24:
      field_length= field->max_display_length() - 1;
      break;
    case FIELD_TYPE_BIT:
      field_length= field->max_display_length();
      decimals= -1;                             // return NULL
      break;
    case FIELD_TYPE_FLOAT:  
    case FIELD_TYPE_DOUBLE:
      field_length= field->field_length;
      if (decimals == NOT_FIXED_DEC)
        decimals= -1;                           // return NULL
    break;
    default:
      field_length= decimals= -1;
      break;
    }

    if (field_length >= 0)
    {
      table->field[10]->store((longlong) field_length, TRUE);
      table->field[10]->set_notnull();
    }
    if (decimals >= 0)
    {
      table->field[11]->store((longlong) decimals, TRUE);
      table->field[11]->set_notnull();
    }

    if (field->has_charset())
    {
      pos=(byte*) field->charset()->csname;
      table->field[12]->store((const char*) pos,
                              strlen((const char*) pos), cs);
      table->field[12]->set_notnull();
      pos=(byte*) field->charset()->name;
      table->field[13]->store((const char*) pos,
                              strlen((const char*) pos), cs);
      table->field[13]->set_notnull();
    }
    pos=(byte*) ((field->flags & PRI_KEY_FLAG) ? "PRI" :
                 (field->flags & UNIQUE_KEY_FLAG) ? "UNI" :
                 (field->flags & MULTIPLE_KEY_FLAG) ? "MUL":"");
    table->field[15]->store((const char*) pos,
                            strlen((const char*) pos), cs);

    end= tmp;
    if (field->unireg_check == Field::NEXT_NUMBER)
      end=strmov(tmp,"auto_increment");
    table->field[16]->store(tmp, (uint) (end-tmp), cs);

    table->field[18]->store(field->comment.str, field->comment.length, cs);
    if (schema_table_store_record(thd, table))
      DBUG_RETURN(1);
  }
  DBUG_RETURN(0);
}



int fill_schema_charsets(THD *thd, TABLE_LIST *tables, COND *cond)
{
  CHARSET_INFO **cs;
  const char *wild= thd->lex->wild ? thd->lex->wild->ptr() : NullS;
  TABLE *table= tables->table;
  CHARSET_INFO *scs= system_charset_info;

  for (cs= all_charsets ; cs < all_charsets+255 ; cs++)
  {
    CHARSET_INFO *tmp_cs= cs[0];
    if (tmp_cs && (tmp_cs->state & MY_CS_PRIMARY) && 
        (tmp_cs->state & MY_CS_AVAILABLE) &&
        !(wild && wild[0] &&
	  wild_case_compare(scs, tmp_cs->csname,wild)))
    {
      const char *comment;
      restore_record(table, s->default_values);
      table->field[0]->store(tmp_cs->csname, strlen(tmp_cs->csname), scs);
      table->field[1]->store(tmp_cs->name, strlen(tmp_cs->name), scs);
      comment= tmp_cs->comment ? tmp_cs->comment : "";
      table->field[2]->store(comment, strlen(comment), scs);
      table->field[3]->store((longlong) tmp_cs->mbmaxlen, TRUE);
      if (schema_table_store_record(thd, table))
        return 1;
    }
  }
  return 0;
}


int fill_schema_collation(THD *thd, TABLE_LIST *tables, COND *cond)
{
  CHARSET_INFO **cs;
  const char *wild= thd->lex->wild ? thd->lex->wild->ptr() : NullS;
  TABLE *table= tables->table;
  CHARSET_INFO *scs= system_charset_info;
  for (cs= all_charsets ; cs < all_charsets+255 ; cs++ )
  {
    CHARSET_INFO **cl;
    CHARSET_INFO *tmp_cs= cs[0];
    if (!tmp_cs || !(tmp_cs->state & MY_CS_AVAILABLE) || 
        !(tmp_cs->state & MY_CS_PRIMARY))
      continue;
    for (cl= all_charsets; cl < all_charsets+255 ;cl ++)
    {
      CHARSET_INFO *tmp_cl= cl[0];
      if (!tmp_cl || !(tmp_cl->state & MY_CS_AVAILABLE) || 
          !my_charset_same(tmp_cs, tmp_cl))
	continue;
      if (!(wild && wild[0] &&
	  wild_case_compare(scs, tmp_cl->name,wild)))
      {
	const char *tmp_buff;
	restore_record(table, s->default_values);
	table->field[0]->store(tmp_cl->name, strlen(tmp_cl->name), scs);
        table->field[1]->store(tmp_cl->csname , strlen(tmp_cl->csname), scs);
        table->field[2]->store((longlong) tmp_cl->number, TRUE);
        tmp_buff= (tmp_cl->state & MY_CS_PRIMARY) ? "Yes" : "";
	table->field[3]->store(tmp_buff, strlen(tmp_buff), scs);
        tmp_buff= (tmp_cl->state & MY_CS_COMPILED)? "Yes" : "";
	table->field[4]->store(tmp_buff, strlen(tmp_buff), scs);
        table->field[5]->store((longlong) tmp_cl->strxfrm_multiply, TRUE);
        if (schema_table_store_record(thd, table))
          return 1;
      }
    }
  }
  return 0;
}


int fill_schema_coll_charset_app(THD *thd, TABLE_LIST *tables, COND *cond)
{
  CHARSET_INFO **cs;
  TABLE *table= tables->table;
  CHARSET_INFO *scs= system_charset_info;
  for (cs= all_charsets ; cs < all_charsets+255 ; cs++ )
  {
    CHARSET_INFO **cl;
    CHARSET_INFO *tmp_cs= cs[0];
    if (!tmp_cs || !(tmp_cs->state & MY_CS_AVAILABLE) || 
        !(tmp_cs->state & MY_CS_PRIMARY))
      continue;
    for (cl= all_charsets; cl < all_charsets+255 ;cl ++)
    {
      CHARSET_INFO *tmp_cl= cl[0];
      if (!tmp_cl || !(tmp_cl->state & MY_CS_AVAILABLE) || 
          !my_charset_same(tmp_cs,tmp_cl))
	continue;
      restore_record(table, s->default_values);
      table->field[0]->store(tmp_cl->name, strlen(tmp_cl->name), scs);
      table->field[1]->store(tmp_cl->csname , strlen(tmp_cl->csname), scs);
      if (schema_table_store_record(thd, table))
        return 1;
    }
  }
  return 0;
}


bool store_schema_proc(THD *thd, TABLE *table, TABLE *proc_table,
                       const char *wild, bool full_access, const char *sp_user)
{
  String tmp_string;
  String sp_db, sp_name, definer;
  MYSQL_TIME time;
  LEX *lex= thd->lex;
  CHARSET_INFO *cs= system_charset_info;
  get_field(thd->mem_root, proc_table->field[0], &sp_db);
  get_field(thd->mem_root, proc_table->field[1], &sp_name);
  get_field(thd->mem_root, proc_table->field[11], &definer);
  if (!full_access)
    full_access= !strcmp(sp_user, definer.ptr());
  if (!full_access && check_some_routine_access(thd, sp_db.ptr(), sp_name.ptr(),
                                                proc_table->field[2]->val_int() ==
                                                TYPE_ENUM_PROCEDURE))
    return 0;

  if (lex->orig_sql_command == SQLCOM_SHOW_STATUS_PROC &&
      proc_table->field[2]->val_int() == TYPE_ENUM_PROCEDURE ||
      lex->orig_sql_command == SQLCOM_SHOW_STATUS_FUNC &&
      proc_table->field[2]->val_int() == TYPE_ENUM_FUNCTION ||
      lex->orig_sql_command == SQLCOM_END)
  {
    restore_record(table, s->default_values);
    if (!wild || !wild[0] || !wild_compare(sp_name.ptr(), wild, 0))
    {
      int enum_idx= (int) proc_table->field[5]->val_int();
      table->field[3]->store(sp_name.ptr(), sp_name.length(), cs);
      get_field(thd->mem_root, proc_table->field[3], &tmp_string);
      table->field[0]->store(tmp_string.ptr(), tmp_string.length(), cs);
      table->field[2]->store(sp_db.ptr(), sp_db.length(), cs);
      get_field(thd->mem_root, proc_table->field[2], &tmp_string);
      table->field[4]->store(tmp_string.ptr(), tmp_string.length(), cs);
      if (proc_table->field[2]->val_int() == TYPE_ENUM_FUNCTION)
      {
        get_field(thd->mem_root, proc_table->field[9], &tmp_string);
        table->field[5]->store(tmp_string.ptr(), tmp_string.length(), cs);
        table->field[5]->set_notnull();
      }
      if (full_access)
      {
        get_field(thd->mem_root, proc_table->field[10], &tmp_string);
        table->field[7]->store(tmp_string.ptr(), tmp_string.length(), cs);
        table->field[7]->set_notnull();
      }
      table->field[6]->store(STRING_WITH_LEN("SQL"), cs);
      table->field[10]->store(STRING_WITH_LEN("SQL"), cs);
      get_field(thd->mem_root, proc_table->field[6], &tmp_string);
      table->field[11]->store(tmp_string.ptr(), tmp_string.length(), cs);
      table->field[12]->store(sp_data_access_name[enum_idx].str, 
                              sp_data_access_name[enum_idx].length , cs);
      get_field(thd->mem_root, proc_table->field[7], &tmp_string);
      table->field[14]->store(tmp_string.ptr(), tmp_string.length(), cs);
      bzero((char *)&time, sizeof(time));
      ((Field_timestamp *) proc_table->field[12])->get_time(&time);
      table->field[15]->store_time(&time, MYSQL_TIMESTAMP_DATETIME);
      bzero((char *)&time, sizeof(time));
      ((Field_timestamp *) proc_table->field[13])->get_time(&time);
      table->field[16]->store_time(&time, MYSQL_TIMESTAMP_DATETIME);
      get_field(thd->mem_root, proc_table->field[14], &tmp_string);
      table->field[17]->store(tmp_string.ptr(), tmp_string.length(), cs);
      get_field(thd->mem_root, proc_table->field[15], &tmp_string);
      table->field[18]->store(tmp_string.ptr(), tmp_string.length(), cs);
      table->field[19]->store(definer.ptr(), definer.length(), cs);
      return schema_table_store_record(thd, table);
    }
  }
  return 0;
}


int fill_schema_proc(THD *thd, TABLE_LIST *tables, COND *cond)
{
  TABLE *proc_table;
  TABLE_LIST proc_tables;
  const char *wild= thd->lex->wild ? thd->lex->wild->ptr() : NullS;
  int res= 0;
  TABLE *table= tables->table;
  bool full_access;
  char definer[USER_HOST_BUFF_SIZE];
  Open_tables_state open_tables_state_backup;
  DBUG_ENTER("fill_schema_proc");

  strxmov(definer, thd->security_ctx->priv_user, "@",
          thd->security_ctx->priv_host, NullS);
  /* We use this TABLE_LIST instance only for checking of privileges. */
  bzero((char*) &proc_tables,sizeof(proc_tables));
  proc_tables.db= (char*) "mysql";
  proc_tables.db_length= 5;
  proc_tables.table_name= proc_tables.alias= (char*) "proc";
  proc_tables.table_name_length= 4;
  proc_tables.lock_type= TL_READ;
  full_access= !check_table_access(thd, SELECT_ACL, &proc_tables, 1);
  if (!(proc_table= open_proc_table_for_read(thd, &open_tables_state_backup)))
  {
    DBUG_RETURN(1);
  }
  proc_table->file->ha_index_init(0);
  if ((res= proc_table->file->index_first(proc_table->record[0])))
  {
    res= (res == HA_ERR_END_OF_FILE) ? 0 : 1;
    goto err;
  }
  if (store_schema_proc(thd, table, proc_table, wild, full_access, definer))
  {
    res= 1;
    goto err;
  }
  while (!proc_table->file->index_next(proc_table->record[0]))
  {
    if (store_schema_proc(thd, table, proc_table, wild, full_access, definer))
    {
      res= 1;
      goto err;
    }
  }

err:
  proc_table->file->ha_index_end();
  close_proc_table(thd, &open_tables_state_backup);
  DBUG_RETURN(res);
}


static int get_schema_stat_record(THD *thd, TABLE_LIST *tables,
				  TABLE *table, bool res,
				  const char *base_name,
				  const char *file_name)
{
  CHARSET_INFO *cs= system_charset_info;
  DBUG_ENTER("get_schema_stat_record");
  if (res)
  {
    if (thd->lex->orig_sql_command != SQLCOM_SHOW_KEYS)
    {
      /*
        I.e. we are in SELECT FROM INFORMATION_SCHEMA.STATISTICS
        rather than in SHOW KEYS
      */
      if (!tables->view)
        push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                     thd->net.last_errno, thd->net.last_error);
      thd->clear_error();
      res= 0;
    }
    DBUG_RETURN(res);
  }
  else if (!tables->view)
  {
    TABLE *show_table= tables->table;
    KEY *key_info=show_table->key_info;
    show_table->file->info(HA_STATUS_VARIABLE |
                           HA_STATUS_NO_LOCK |
                           HA_STATUS_TIME);
    for (uint i=0 ; i < show_table->s->keys ; i++,key_info++)
    {
      KEY_PART_INFO *key_part= key_info->key_part;
      const char *str;
      for (uint j=0 ; j < key_info->key_parts ; j++,key_part++)
      {
        restore_record(table, s->default_values);
        table->field[1]->store(base_name, strlen(base_name), cs);
        table->field[2]->store(file_name, strlen(file_name), cs);
        table->field[3]->store((longlong) ((key_info->flags &
                                            HA_NOSAME) ? 0 : 1), TRUE);
        table->field[4]->store(base_name, strlen(base_name), cs);
        table->field[5]->store(key_info->name, strlen(key_info->name), cs);
        table->field[6]->store((longlong) (j+1), TRUE);
        str=(key_part->field ? key_part->field->field_name :
             "?unknown field?");
        table->field[7]->store(str, strlen(str), cs);
        if (show_table->file->index_flags(i, j, 0) & HA_READ_ORDER)
        {
          table->field[8]->store(((key_part->key_part_flag &
                                   HA_REVERSE_SORT) ?
                                  "D" : "A"), 1, cs);
          table->field[8]->set_notnull();
        }
        KEY *key=show_table->key_info+i;
        if (key->rec_per_key[j])
        {
          ha_rows records=(show_table->file->records /
                           key->rec_per_key[j]);
          table->field[9]->store((longlong) records, TRUE);
          table->field[9]->set_notnull();
        }
        if (!(key_info->flags & HA_FULLTEXT) &&
            (key_part->field &&
             key_part->length !=
             show_table->field[key_part->fieldnr-1]->key_length()))
        {
          table->field[10]->store((longlong) key_part->length /
                                  key_part->field->charset()->mbmaxlen, 1);
          table->field[10]->set_notnull();
        }
        uint flags= key_part->field ? key_part->field->flags : 0;
        const char *pos=(char*) ((flags & NOT_NULL_FLAG) ? "" : "YES");
        table->field[12]->store(pos, strlen(pos), cs);
        pos= show_table->file->index_type(i);
        table->field[13]->store(pos, strlen(pos), cs);
        if (!show_table->s->keys_in_use.is_set(i))
          table->field[14]->store(STRING_WITH_LEN("disabled"), cs);
        else
          table->field[14]->store("", 0, cs);
        table->field[14]->set_notnull();
        if (schema_table_store_record(thd, table))
          DBUG_RETURN(1);
      }
    }
  }
  DBUG_RETURN(res);
}


static int get_schema_views_record(THD *thd, TABLE_LIST *tables,
				   TABLE *table, bool res,
				   const char *base_name,
				   const char *file_name)
{
  CHARSET_INFO *cs= system_charset_info;
  DBUG_ENTER("get_schema_views_record");
  char definer[USER_HOST_BUFF_SIZE];
  uint definer_len;
  bool updatable_view;

  if (tables->view)
  {
    Security_context *sctx= thd->security_ctx;
    if (!tables->allowed_show)
    {
      if (!my_strcasecmp(system_charset_info, tables->definer.user.str,
                         sctx->priv_user) &&
          !my_strcasecmp(system_charset_info, tables->definer.host.str,
                         sctx->priv_host))
        tables->allowed_show= TRUE;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
      else
      {
        if ((thd->col_access & (SHOW_VIEW_ACL|SELECT_ACL)) ==
            (SHOW_VIEW_ACL|SELECT_ACL))
          tables->allowed_show= TRUE;
        else
        {
          TABLE_LIST table_list;
          uint view_access;
          memset(&table_list, 0, sizeof(table_list));
          table_list.db= tables->view_db.str;
          table_list.table_name= tables->view_name.str;
          table_list.grant.privilege= thd->col_access;
          view_access= get_table_grant(thd, &table_list);
          if ((view_access & (SHOW_VIEW_ACL|SELECT_ACL)) ==
              (SHOW_VIEW_ACL|SELECT_ACL))
            tables->allowed_show= TRUE;
        }
      }
#endif
    }
    restore_record(table, s->default_values);
    table->field[1]->store(tables->view_db.str, tables->view_db.length, cs);
    table->field[2]->store(tables->view_name.str, tables->view_name.length, cs);
    if (tables->allowed_show)
    {
      char buff[2048];
      String qwe_str(buff, sizeof(buff), cs);
      qwe_str.length(0);
      qwe_str.append(STRING_WITH_LEN("/* "));
      append_algorithm(tables, &qwe_str);
      qwe_str.append(STRING_WITH_LEN("*/ "));
      qwe_str.append(tables->query.str, tables->query.length);
      table->field[3]->store(qwe_str.ptr(), qwe_str.length(), cs);
    }

    if (tables->with_check != VIEW_CHECK_NONE)
    {
      if (tables->with_check == VIEW_CHECK_LOCAL)
        table->field[4]->store(STRING_WITH_LEN("LOCAL"), cs);
      else
        table->field[4]->store(STRING_WITH_LEN("CASCADED"), cs);
    }
    else
      table->field[4]->store(STRING_WITH_LEN("NONE"), cs);

    updatable_view= 0;
    if (tables->algorithm != VIEW_ALGORITHM_TMPTABLE)
    {
      /*
        We should use tables->view->select_lex.item_list here and
        can not use Field_iterator_view because the view always uses
        temporary algorithm during opening for I_S and
        TABLE_LIST fields 'field_translation' & 'field_translation_end'
        are uninitialized is this case.
      */
      List<Item> *fields= &tables->view->select_lex.item_list;
      List_iterator<Item> it(*fields);
      Item *item;
      Item_field *field;
      /*
        check that at least one column in view is updatable
      */
      while ((item= it++))
      {
        if ((field= item->filed_for_view_update()) && field->field &&
            !field->field->table->pos_in_table_list->schema_table)
        {
          updatable_view= 1;
          break;
        }
      }
      if (updatable_view && !tables->view->can_be_merged())
        updatable_view= 0;
    }
    if (updatable_view)
      table->field[5]->store(STRING_WITH_LEN("YES"), cs);
    else
      table->field[5]->store(STRING_WITH_LEN("NO"), cs);
    definer_len= (strxmov(definer, tables->definer.user.str, "@",
                          tables->definer.host.str, NullS) - definer);
    table->field[6]->store(definer, definer_len, cs);
    if (tables->view_suid)
      table->field[7]->store(STRING_WITH_LEN("DEFINER"), cs);
    else
      table->field[7]->store(STRING_WITH_LEN("INVOKER"), cs);
    if (schema_table_store_record(thd, table))
      DBUG_RETURN(1);
    if (res)
      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
                   thd->net.last_errno, thd->net.last_error);
  }
  if (res) 
    thd->clear_error();
  DBUG_RETURN(0);
}


bool store_constraints(THD *thd, TABLE *table, const char *db,
                       const char *tname, const char *key_name,
                       uint key_len, const char *con_type, uint con_len)
{
  CHARSET_INFO *cs= system_charset_info;
  restore_record(table, s->default_values);
  table->field[1]->store(db, strlen(db), cs);
  table->field[2]->store(key_name, key_len, cs);
  table->field[3]->store(db, strlen(db), cs);
  table->field[4]->store(tname, strlen(tname), cs);
  table->field[5]->store(con_type, con_len, cs);
  return schema_table_store_record(thd, table);
}


static int get_schema_constraints_record(THD *thd, TABLE_LIST *tables,
					 TABLE *table, bool res,
					 const char *base_name,
					 const char *file_name)
{
  DBUG_ENTER("get_schema_constraints_record");
  if (res)
  {
    if (!tables->view)
      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                   thd->net.last_errno, thd->net.last_error);
    thd->clear_error();
    DBUG_RETURN(0);
  }
  else if (!tables->view)
  {
    List<FOREIGN_KEY_INFO> f_key_list;
    TABLE *show_table= tables->table;
    KEY *key_info=show_table->key_info;
    uint primary_key= show_table->s->primary_key;
    show_table->file->info(HA_STATUS_VARIABLE | 
                           HA_STATUS_NO_LOCK |
                           HA_STATUS_TIME);
    for (uint i=0 ; i < show_table->s->keys ; i++, key_info++)
    {
      if (i != primary_key && !(key_info->flags & HA_NOSAME))
        continue;

      if (i == primary_key && !strcmp(key_info->name, primary_key_name))
      {
        if (store_constraints(thd, table, base_name, file_name, key_info->name,
                              strlen(key_info->name),
                              STRING_WITH_LEN("PRIMARY KEY")))
          DBUG_RETURN(1);
      }
      else if (key_info->flags & HA_NOSAME)
      {
        if (store_constraints(thd, table, base_name, file_name, key_info->name,
                              strlen(key_info->name),
                              STRING_WITH_LEN("UNIQUE")))
          DBUG_RETURN(1);
      }
    }

    show_table->file->get_foreign_key_list(thd, &f_key_list);
    FOREIGN_KEY_INFO *f_key_info;
    List_iterator_fast<FOREIGN_KEY_INFO> it(f_key_list);
    while ((f_key_info=it++))
    {
      if (store_constraints(thd, table, base_name, file_name, 
                            f_key_info->forein_id->str,
                            strlen(f_key_info->forein_id->str),
                            "FOREIGN KEY", 11))
        DBUG_RETURN(1);
    }
  }
  DBUG_RETURN(res);
}


static bool store_trigger(THD *thd, TABLE *table, const char *db,
                          const char *tname, LEX_STRING *trigger_name,
                          enum trg_event_type event,
                          enum trg_action_time_type timing,
                          LEX_STRING *trigger_stmt,
                          ulong sql_mode,
                          LEX_STRING *definer_buffer)
{
  CHARSET_INFO *cs= system_charset_info;
  byte *sql_mode_str;
  ulong sql_mode_len;

  restore_record(table, s->default_values);
  table->field[1]->store(db, strlen(db), cs);
  table->field[2]->store(trigger_name->str, trigger_name->length, cs);
  table->field[3]->store(trg_event_type_names[event].str,
                         trg_event_type_names[event].length, cs);
  table->field[5]->store(db, strlen(db), cs);
  table->field[6]->store(tname, strlen(tname), cs);
  table->field[9]->store(trigger_stmt->str, trigger_stmt->length, cs);
  table->field[10]->store(STRING_WITH_LEN("ROW"), cs);
  table->field[11]->store(trg_action_time_type_names[timing].str,
                          trg_action_time_type_names[timing].length, cs);
  table->field[14]->store(STRING_WITH_LEN("OLD"), cs);
  table->field[15]->store(STRING_WITH_LEN("NEW"), cs);

  sql_mode_str=
    sys_var_thd_sql_mode::symbolic_mode_representation(thd,
                                                       sql_mode,
                                                       &sql_mode_len);
  table->field[17]->store((const char*)sql_mode_str, sql_mode_len, cs);
  table->field[18]->store((const char *)definer_buffer->str, definer_buffer->length, cs);
  return schema_table_store_record(thd, table);
}


static int get_schema_triggers_record(THD *thd, TABLE_LIST *tables,
				      TABLE *table, bool res,
				      const char *base_name,
				      const char *file_name)
{
  DBUG_ENTER("get_schema_triggers_record");
  /*
    res can be non zero value when processed table is a view or
    error happened during opening of processed table.
  */
  if (res)
  {
    if (!tables->view)
      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                   thd->net.last_errno, thd->net.last_error);
    thd->clear_error();
    DBUG_RETURN(0);
  }
  if (!tables->view && tables->table->triggers)
  {
    Table_triggers_list *triggers= tables->table->triggers;
    int event, timing;

#ifndef NO_EMBEDDED_ACCESS_CHECKS
    if (!(thd->security_ctx->master_access & SUPER_ACL))
      goto ret;
#endif

    for (event= 0; event < (int)TRG_EVENT_MAX; event++)
    {
      for (timing= 0; timing < (int)TRG_ACTION_MAX; timing++)
      {
        LEX_STRING trigger_name;
        LEX_STRING trigger_stmt;
        ulong sql_mode;
        char definer_holder[USER_HOST_BUFF_SIZE];
        LEX_STRING definer_buffer;
        definer_buffer.str= definer_holder;
        if (triggers->get_trigger_info(thd, (enum trg_event_type) event,
                                       (enum trg_action_time_type)timing,
                                       &trigger_name, &trigger_stmt,
                                       &sql_mode,
                                       &definer_buffer))
          continue;

        if (store_trigger(thd, table, base_name, file_name, &trigger_name,
                         (enum trg_event_type) event,
                         (enum trg_action_time_type) timing, &trigger_stmt,
                         sql_mode,
                         &definer_buffer))
          DBUG_RETURN(1);
      }
    }
  }
#ifndef NO_EMBEDDED_ACCESS_CHECKS
ret:
#endif
  DBUG_RETURN(0);
}


void store_key_column_usage(TABLE *table, const char*db, const char *tname,
                            const char *key_name, uint key_len, 
                            const char *con_type, uint con_len, longlong idx)
{
  CHARSET_INFO *cs= system_charset_info;
  table->field[1]->store(db, strlen(db), cs);
  table->field[2]->store(key_name, key_len, cs);
  table->field[4]->store(db, strlen(db), cs);
  table->field[5]->store(tname, strlen(tname), cs);
  table->field[6]->store(con_type, con_len, cs);
  table->field[7]->store((longlong) idx, TRUE);
}


static int get_schema_key_column_usage_record(THD *thd,
					      TABLE_LIST *tables,
					      TABLE *table, bool res,
					      const char *base_name,
					      const char *file_name)
{
  DBUG_ENTER("get_schema_key_column_usage_record");
  if (res)
  {
    if (!tables->view)
      push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                   thd->net.last_errno, thd->net.last_error);
    thd->clear_error();
    DBUG_RETURN(0);
  }
  else if (!tables->view)
  {
    List<FOREIGN_KEY_INFO> f_key_list;
    TABLE *show_table= tables->table;
    KEY *key_info=show_table->key_info;
    uint primary_key= show_table->s->primary_key;
    show_table->file->info(HA_STATUS_VARIABLE | 
                           HA_STATUS_NO_LOCK |
                           HA_STATUS_TIME);
    for (uint i=0 ; i < show_table->s->keys ; i++, key_info++)
    {
      if (i != primary_key && !(key_info->flags & HA_NOSAME))
        continue;
      uint f_idx= 0;
      KEY_PART_INFO *key_part= key_info->key_part;
      for (uint j=0 ; j < key_info->key_parts ; j++,key_part++)
      {
        if (key_part->field)
        {
          f_idx++;
          restore_record(table, s->default_values);
          store_key_column_usage(table, base_name, file_name,
                                 key_info->name,
                                 strlen(key_info->name), 
                                 key_part->field->field_name, 
                                 strlen(key_part->field->field_name),
                                 (longlong) f_idx);
          if (schema_table_store_record(thd, table))
            DBUG_RETURN(1);
        }
      }
    }

    show_table->file->get_foreign_key_list(thd, &f_key_list);
    FOREIGN_KEY_INFO *f_key_info;
    List_iterator_fast<FOREIGN_KEY_INFO> fkey_it(f_key_list);
    while ((f_key_info= fkey_it++))
    {
      LEX_STRING *f_info;
      LEX_STRING *r_info;
      List_iterator_fast<LEX_STRING> it(f_key_info->foreign_fields),
        it1(f_key_info->referenced_fields);
      uint f_idx= 0;
      while ((f_info= it++))
      {
        r_info= it1++;
        f_idx++;
        restore_record(table, s->default_values);
        store_key_column_usage(table, base_name, file_name,
                               f_key_info->forein_id->str,
                               f_key_info->forein_id->length,
                               f_info->str, f_info->length,
                               (longlong) f_idx);
        table->field[8]->store((longlong) f_idx, TRUE);
        table->field[8]->set_notnull();
        table->field[9]->store(f_key_info->referenced_db->str,
                               f_key_info->referenced_db->length,
                               system_charset_info);
        table->field[9]->set_notnull();
        table->field[10]->store(f_key_info->referenced_table->str,
                                f_key_info->referenced_table->length, 
                                system_charset_info);
        table->field[10]->set_notnull();
        table->field[11]->store(r_info->str, r_info->length,
                                system_charset_info);
        table->field[11]->set_notnull();
        if (schema_table_store_record(thd, table))
          DBUG_RETURN(1);
      }
    }
  }
  DBUG_RETURN(res);
}


int fill_open_tables(THD *thd, TABLE_LIST *tables, COND *cond)
{
  DBUG_ENTER("fill_open_tables");
  const char *wild= thd->lex->wild ? thd->lex->wild->ptr() : NullS;
  TABLE *table= tables->table;
  CHARSET_INFO *cs= system_charset_info;
  OPEN_TABLE_LIST *open_list;
  if (!(open_list=list_open_tables(thd,thd->lex->select_lex.db, wild))
            && thd->is_fatal_error)
    DBUG_RETURN(1);

  for (; open_list ; open_list=open_list->next)
  {
    restore_record(table, s->default_values);
    table->field[0]->store(open_list->db, strlen(open_list->db), cs);
    table->field[1]->store(open_list->table, strlen(open_list->table), cs);
    table->field[2]->store((longlong) open_list->in_use, TRUE);
    table->field[3]->store((longlong) open_list->locked, TRUE);
    if (schema_table_store_record(thd, table))
      DBUG_RETURN(1);
  }
  DBUG_RETURN(0);
}


int fill_variables(THD *thd, TABLE_LIST *tables, COND *cond)
{
  DBUG_ENTER("fill_variables");
  int res= 0;
  LEX *lex= thd->lex;
  const char *wild= lex->wild ? lex->wild->ptr() : NullS;
  pthread_mutex_lock(&LOCK_global_system_variables);
  res= show_status_array(thd, wild, init_vars, 
                         lex->option_type, 0, "", tables->table);
  pthread_mutex_unlock(&LOCK_global_system_variables);
  DBUG_RETURN(res);
}


int fill_status(THD *thd, TABLE_LIST *tables, COND *cond)
{
  DBUG_ENTER("fill_status");
  LEX *lex= thd->lex;
  const char *wild= lex->wild ? lex->wild->ptr() : NullS;
  int res= 0;
  STATUS_VAR tmp;
  ha_update_statistics();                    /* Export engines statistics */
  pthread_mutex_lock(&LOCK_status);
  if (lex->option_type == OPT_GLOBAL)
    calc_sum_of_all_status(&tmp);
  res= show_status_array(thd, wild, status_vars, OPT_GLOBAL,
                         (lex->option_type == OPT_GLOBAL ? 
                          &tmp: &thd->status_var), "",tables->table);
  pthread_mutex_unlock(&LOCK_status);
  DBUG_RETURN(res);
}


/*
  Find schema_tables elment by name

  SYNOPSIS
    find_schema_table()
    thd                 thread handler
    table_name          table name

  RETURN
    0	table not found
    #   pointer to 'shema_tables' element
*/

ST_SCHEMA_TABLE *find_schema_table(THD *thd, const char* table_name)
{
  ST_SCHEMA_TABLE *schema_table= schema_tables;
  for (; schema_table->table_name; schema_table++)
  {
    if (!my_strcasecmp(system_charset_info,
                       schema_table->table_name,
                       table_name))
      return schema_table;
  }
  return 0;
}


ST_SCHEMA_TABLE *get_schema_table(enum enum_schema_tables schema_table_idx)
{
  return &schema_tables[schema_table_idx];
}


/*
  Create information_schema table using schema_table data

  SYNOPSIS
    create_schema_table()
    thd	       	          thread handler
    schema_table          pointer to 'shema_tables' element

  RETURN
    #	                  Pointer to created table
    0	                  Can't create table
*/

TABLE *create_schema_table(THD *thd, TABLE_LIST *table_list)
{
  int field_count= 0;
  Item *item;
  TABLE *table;
  List<Item> field_list;
  ST_SCHEMA_TABLE *schema_table= table_list->schema_table;
  ST_FIELD_INFO *fields_info= schema_table->fields_info;
  CHARSET_INFO *cs= system_charset_info;
  DBUG_ENTER("create_schema_table");

  for (; fields_info->field_name; fields_info++)
  {
    switch (fields_info->field_type) {
    case MYSQL_TYPE_LONG:
      if (!(item= new Item_int(fields_info->field_name,
                               fields_info->value,
                               fields_info->field_length)))
      {
        DBUG_RETURN(0);
      }
      break;
    case MYSQL_TYPE_TIMESTAMP:
      if (!(item=new Item_datetime(fields_info->field_name)))
      {
        DBUG_RETURN(0);
      }
      break;
    case MYSQL_TYPE_FLOAT:
    case MYSQL_TYPE_DOUBLE:
      if ((item= new Item_float(fields_info->field_name, 0.0, NOT_FIXED_DEC, 
                           fields_info->field_length)) == NULL)
        DBUG_RETURN(NULL);
      break;
    default:
      /* Don't let unimplemented types pass through. Could be a grave error. */
      DBUG_ASSERT(fields_info->field_type == MYSQL_TYPE_STRING);

      if (!(item= new Item_empty_string("", fields_info->field_length, cs)))
      {
        DBUG_RETURN(0);
      }
      item->set_name(fields_info->field_name,
                     strlen(fields_info->field_name), cs);
      break;
    }
    field_list.push_back(item);
    item->maybe_null= fields_info->maybe_null;
    field_count++;
  }
  TMP_TABLE_PARAM *tmp_table_param =
    (TMP_TABLE_PARAM*) (thd->calloc(sizeof(TMP_TABLE_PARAM)));
  tmp_table_param->init();
  tmp_table_param->table_charset= cs;
  tmp_table_param->field_count= field_count;
  tmp_table_param->schema_table= 1;
  SELECT_LEX *select_lex= thd->lex->current_select;
  if (!(table= create_tmp_table(thd, tmp_table_param,
                                field_list, (ORDER*) 0, 0, 0, 
                                (select_lex->options | thd->options |
                                 TMP_TABLE_ALL_COLUMNS),
                                HA_POS_ERROR, table_list->alias)))
    DBUG_RETURN(0);
  table_list->schema_table_param= tmp_table_param;
  DBUG_RETURN(table);
}


/*
  For old SHOW compatibility. It is used when
  old SHOW doesn't have generated column names
  Make list of fields for SHOW

  SYNOPSIS
    make_old_format()
    thd			thread handler
    schema_table        pointer to 'schema_tables' element

  RETURN
   -1	errror
    0	success
*/

int make_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  ST_FIELD_INFO *field_info= schema_table->fields_info;
  Name_resolution_context *context= &thd->lex->select_lex.context;
  for (; field_info->field_name; field_info++)
  {
    if (field_info->old_name)
    {
      Item_field *field= new Item_field(context,
                                        NullS, NullS, field_info->field_name);
      if (field)
      {
        field->set_name(field_info->old_name,
                        strlen(field_info->old_name),
                        system_charset_info);
        if (add_item_to_list(thd, field))
          return 1;
      }
    }
  }
  return 0;
}


int make_schemata_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  char tmp[128];
  LEX *lex= thd->lex;
  SELECT_LEX *sel= lex->current_select;
  Name_resolution_context *context= &sel->context;

  if (!sel->item_list.elements)
  {
    ST_FIELD_INFO *field_info= &schema_table->fields_info[1];
    String buffer(tmp,sizeof(tmp), system_charset_info);
    Item_field *field= new Item_field(context,
                                      NullS, NullS, field_info->field_name);
    if (!field || add_item_to_list(thd, field))
      return 1;
    buffer.length(0);
    buffer.append(field_info->old_name);
    if (lex->wild && lex->wild->ptr())
    {
      buffer.append(STRING_WITH_LEN(" ("));
      buffer.append(lex->wild->ptr());
      buffer.append(')');
    }
    field->set_name(buffer.ptr(), buffer.length(), system_charset_info);
  }
  return 0;
}


int make_table_names_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  char tmp[128];
  String buffer(tmp,sizeof(tmp), thd->charset());
  LEX *lex= thd->lex;
  Name_resolution_context *context= &lex->select_lex.context;

  ST_FIELD_INFO *field_info= &schema_table->fields_info[2];
  buffer.length(0);
  buffer.append(field_info->old_name);
  buffer.append(lex->select_lex.db);
  if (lex->wild && lex->wild->ptr())
  {
    buffer.append(STRING_WITH_LEN(" ("));
    buffer.append(lex->wild->ptr());
    buffer.append(')');
  }
  Item_field *field= new Item_field(context,
                                    NullS, NullS, field_info->field_name);
  if (add_item_to_list(thd, field))
    return 1;
  field->set_name(buffer.ptr(), buffer.length(), system_charset_info);
  if (thd->lex->verbose)
  {
    field->set_name(buffer.ptr(), buffer.length(), system_charset_info);
    field_info= &schema_table->fields_info[3];
    field= new Item_field(context, NullS, NullS, field_info->field_name);
    if (add_item_to_list(thd, field))
      return 1;
    field->set_name(field_info->old_name, strlen(field_info->old_name),
                    system_charset_info);
  }
  return 0;
}


int make_columns_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  int fields_arr[]= {3, 14, 13, 6, 15, 5, 16, 17, 18, -1};
  int *field_num= fields_arr;
  ST_FIELD_INFO *field_info;
  Name_resolution_context *context= &thd->lex->select_lex.context;

  for (; *field_num >= 0; field_num++)
  {
    field_info= &schema_table->fields_info[*field_num];
    if (!thd->lex->verbose && (*field_num == 13 ||
                               *field_num == 17 ||
                               *field_num == 18))
      continue;
    Item_field *field= new Item_field(context,
                                      NullS, NullS, field_info->field_name);
    if (field)
    {
      field->set_name(field_info->old_name,
                      strlen(field_info->old_name),
                      system_charset_info);
      if (add_item_to_list(thd, field))
        return 1;
    }
  }
  return 0;
}


int make_character_sets_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  int fields_arr[]= {0, 2, 1, 3, -1};
  int *field_num= fields_arr;
  ST_FIELD_INFO *field_info;
  Name_resolution_context *context= &thd->lex->select_lex.context;

  for (; *field_num >= 0; field_num++)
  {
    field_info= &schema_table->fields_info[*field_num];
    Item_field *field= new Item_field(context,
                                      NullS, NullS, field_info->field_name);
    if (field)
    {
      field->set_name(field_info->old_name,
                      strlen(field_info->old_name),
                      system_charset_info);
      if (add_item_to_list(thd, field))
        return 1;
    }
  }
  return 0;
}


int make_proc_old_format(THD *thd, ST_SCHEMA_TABLE *schema_table)
{
  int fields_arr[]= {2, 3, 4, 19, 16, 15, 14, 18, -1};
  int *field_num= fields_arr;
  ST_FIELD_INFO *field_info;
  Name_resolution_context *context= &thd->lex->select_lex.context;

  for (; *field_num >= 0; field_num++)
  {
    field_info= &schema_table->fields_info[*field_num];
    Item_field *field= new Item_field(context,
                                      NullS, NullS, field_info->field_name);
    if (field)
    {
      field->set_name(field_info->old_name,
                      strlen(field_info->old_name),
                      system_charset_info);
      if (add_item_to_list(thd, field))
        return 1;
    }
  }
  return 0;
}


/*
  Create information_schema table

  SYNOPSIS
  mysql_schema_table()
    thd                thread handler
    lex                pointer to LEX
    table_list         pointer to table_list

  RETURN
    0	success
    1   error
*/

int mysql_schema_table(THD *thd, LEX *lex, TABLE_LIST *table_list)
{
  TABLE *table;
  DBUG_ENTER("mysql_schema_table");
  if (!(table= table_list->schema_table->create_table(thd, table_list)))
  {
    DBUG_RETURN(1);
  }
  table->s->tmp_table= SYSTEM_TMP_TABLE;
  table->grant.privilege= SELECT_ACL;
  /*
    This test is necessary to make
    case insensitive file systems +
    upper case table names(information schema tables) +
    views
    working correctly
  */
  if (table_list->schema_table_name)
    table->alias_name_used= my_strcasecmp(table_alias_charset,
                                          table_list->schema_table_name,
                                          table_list->alias);
  table_list->table_name= (char*) table->s->table_name;
  table_list->table_name_length= strlen(table->s->table_name);
  table_list->table= table;
  table->next= thd->derived_tables;
  thd->derived_tables= table;
  table_list->select_lex->options |= OPTION_SCHEMA_TABLE;
  lex->safe_to_cache_query= 0;

  if (table_list->schema_table_reformed) // show command
  {
    SELECT_LEX *sel= lex->current_select;
    Item *item;
    Field_translator *transl, *org_transl;

    if (table_list->field_translation)
    {
      Field_translator *end= table_list->field_translation_end;
      for (transl= table_list->field_translation; transl < end; transl++)
      {
        if (!transl->item->fixed &&
            transl->item->fix_fields(thd, &transl->item))
          DBUG_RETURN(1);
      }
      DBUG_RETURN(0);
    }
    List_iterator_fast<Item> it(sel->item_list);
    if (!(transl=
          (Field_translator*)(thd->stmt_arena->
                              alloc(sel->item_list.elements *
                                    sizeof(Field_translator)))))
    {
      DBUG_RETURN(1);
    }
    for (org_transl= transl; (item= it++); transl++)
    {
      transl->item= item;
      transl->name= item->name;
      if (!item->fixed && item->fix_fields(thd, &transl->item))
      {
        DBUG_RETURN(1);
      }
    }
    table_list->field_translation= org_transl;
    table_list->field_translation_end= transl;
  }

  DBUG_RETURN(0);
}


/*
  Generate select from information_schema table

  SYNOPSIS
    make_schema_select()
    thd                  thread handler
    sel                  pointer to SELECT_LEX
    schema_table_idx     index of 'schema_tables' element

  RETURN
    0	success
    1   error
*/

int make_schema_select(THD *thd, SELECT_LEX *sel,
		       enum enum_schema_tables schema_table_idx)
{
  ST_SCHEMA_TABLE *schema_table= get_schema_table(schema_table_idx);
  LEX_STRING db, table;
  DBUG_ENTER("mysql_schema_select");
  /*
     We have to make non const db_name & table_name
     because of lower_case_table_names
  */
  make_lex_string(thd, &db, INFORMATION_SCHEMA_NAME.str,
                  INFORMATION_SCHEMA_NAME.length, 0);
  make_lex_string(thd, &table, schema_table->table_name,
                  strlen(schema_table->table_name), 0);
  if (schema_table->old_format(thd, schema_table) ||   /* Handle old syntax */
      !sel->add_table_to_list(thd, new Table_ident(thd, db, table, 0),
                              0, 0, TL_READ, (List<String> *) 0,
                              (List<String> *) 0))
  {
    DBUG_RETURN(1);
  }
  DBUG_RETURN(0);
}


/*
  Fill temporary schema tables before SELECT

  SYNOPSIS
    get_schema_tables_result()
    join  join which use schema tables
    executed_place place where I_S table processed

  RETURN
    FALSE success
    TRUE  error
*/

bool get_schema_tables_result(JOIN *join,
                              enum enum_schema_table_state executed_place)
{
  JOIN_TAB *tmp_join_tab= join->join_tab+join->tables;
  THD *thd= join->thd;
  LEX *lex= thd->lex;
  bool result= 0;
  DBUG_ENTER("get_schema_tables_result");

  thd->no_warnings_for_error= 1;
  for (JOIN_TAB *tab= join->join_tab; tab < tmp_join_tab; tab++)
  {  
    if (!tab->table || !tab->table->pos_in_table_list)
      break;

    TABLE_LIST *table_list= tab->table->pos_in_table_list;
    if (table_list->schema_table && thd->fill_derived_tables())
    {
      bool is_subselect= (&lex->unit != lex->current_select->master_unit() &&
                          lex->current_select->master_unit()->item);
      /*
        If schema table is already processed and
        the statement is not a subselect then
        we don't need to fill this table again.
        If schema table is already processed and
        schema_table_state != executed_place then
        table is already processed and
        we should skip second data processing.
      */
      if (table_list->schema_table_state &&
          (!is_subselect || table_list->schema_table_state != executed_place))
        continue;

      /*
        if table is used in a subselect and
        table has been processed earlier with the same
        'executed_place' value then we should refresh the table.
      */
      if (table_list->schema_table_state && is_subselect)
      {
        table_list->table->file->extra(HA_EXTRA_NO_CACHE);
        table_list->table->file->extra(HA_EXTRA_RESET_STATE);
        table_list->table->file->delete_all_rows();
        free_io_cache(table_list->table);
        filesort_free_buffers(table_list->table,1);
        table_list->table->null_row= 0;
      }
      else
        table_list->table->file->records= 0;

      if (table_list->schema_table->fill_table(thd, table_list,
                                               tab->select_cond))
      {
        result= 1;
        join->error= 1;
        tab->read_record.file= table_list->table->file;
        table_list->schema_table_state= executed_place;
        break;
      }
      tab->read_record.file= table_list->table->file;
      table_list->schema_table_state= executed_place;
    }
  }
  thd->no_warnings_for_error= 0;
  DBUG_RETURN(result);
}


ST_FIELD_INFO schema_fields_info[]=
{
  {"CATALOG_NAME", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"SCHEMA_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Database"},
  {"DEFAULT_CHARACTER_SET_NAME", 64, MYSQL_TYPE_STRING, 0, 0, 0},
  {"DEFAULT_COLLATION_NAME", 64, MYSQL_TYPE_STRING, 0, 0, 0},
  {"SQL_PATH", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO tables_fields_info[]=
{
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA",NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Name"},
  {"TABLE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"ENGINE", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, "Engine"},
  {"VERSION", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1, "Version"},
  {"ROW_FORMAT", 10, MYSQL_TYPE_STRING, 0, 1, "Row_format"},
  {"TABLE_ROWS", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1, "Rows"},
  {"AVG_ROW_LENGTH", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1,
   "Avg_row_length"},
  {"DATA_LENGTH", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1,
   "Data_length"},
  {"MAX_DATA_LENGTH", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1,
   "Max_data_length"},
  {"INDEX_LENGTH", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1,
   "Index_length"},
  {"DATA_FREE", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1, "Data_free"},
  {"AUTO_INCREMENT", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1,
   "Auto_increment"},
  {"CREATE_TIME", 0, MYSQL_TYPE_TIMESTAMP, 0, 1, "Create_time"},
  {"UPDATE_TIME", 0, MYSQL_TYPE_TIMESTAMP, 0, 1, "Update_time"},
  {"CHECK_TIME", 0, MYSQL_TYPE_TIMESTAMP, 0, 1, "Check_time"},
  {"TABLE_COLLATION", 64, MYSQL_TYPE_STRING, 0, 1, "Collation"},
  {"CHECKSUM", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1, "Checksum"},
  {"CREATE_OPTIONS", 255, MYSQL_TYPE_STRING, 0, 1, "Create_options"},
  {"TABLE_COMMENT", 80, MYSQL_TYPE_STRING, 0, 0, "Comment"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO columns_fields_info[]=
{
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Field"},
  {"ORDINAL_POSITION", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 0, 0},
  {"COLUMN_DEFAULT", MAX_FIELD_VARCHARLENGTH, MYSQL_TYPE_STRING, 0, 1, "Default"},
  {"IS_NULLABLE", 3, MYSQL_TYPE_STRING, 0, 0, "Null"},
  {"DATA_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CHARACTER_MAXIMUM_LENGTH", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1,
   0},
  {"CHARACTER_OCTET_LENGTH", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1, 0},
  {"NUMERIC_PRECISION", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1, 0},
  {"NUMERIC_SCALE", MY_INT64_NUM_DECIMAL_DIGITS , MYSQL_TYPE_LONG, 0, 1, 0},
  {"CHARACTER_SET_NAME", 64, MYSQL_TYPE_STRING, 0, 1, 0},
  {"COLLATION_NAME", 64, MYSQL_TYPE_STRING, 0, 1, "Collation"},
  {"COLUMN_TYPE", 65535, MYSQL_TYPE_STRING, 0, 0, "Type"},
  {"COLUMN_KEY", 3, MYSQL_TYPE_STRING, 0, 0, "Key"},
  {"EXTRA", 20, MYSQL_TYPE_STRING, 0, 0, "Extra"},
  {"PRIVILEGES", 80, MYSQL_TYPE_STRING, 0, 0, "Privileges"},
  {"COLUMN_COMMENT", 255, MYSQL_TYPE_STRING, 0, 0, "Comment"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO charsets_fields_info[]=
{
  {"CHARACTER_SET_NAME", 64, MYSQL_TYPE_STRING, 0, 0, "Charset"},
  {"DEFAULT_COLLATE_NAME", 64, MYSQL_TYPE_STRING, 0, 0, "Default collation"},
  {"DESCRIPTION", 60, MYSQL_TYPE_STRING, 0, 0, "Description"},
  {"MAXLEN", 3 ,MYSQL_TYPE_LONG, 0, 0, "Maxlen"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO collation_fields_info[]=
{
  {"COLLATION_NAME", 64, MYSQL_TYPE_STRING, 0, 0, "Collation"},
  {"CHARACTER_SET_NAME", 64, MYSQL_TYPE_STRING, 0, 0, "Charset"},
  {"ID", MY_INT32_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONG, 0, 0, "Id"},
  {"IS_DEFAULT", 3, MYSQL_TYPE_STRING, 0, 0, "Default"},
  {"IS_COMPILED", 3, MYSQL_TYPE_STRING, 0, 0, "Compiled"},
  {"SORTLEN", 3 ,MYSQL_TYPE_LONG, 0, 0, "Sortlen"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO coll_charset_app_fields_info[]=
{
  {"COLLATION_NAME", 64, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CHARACTER_SET_NAME", 64, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO proc_fields_info[]=
{
  {"SPECIFIC_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"ROUTINE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"ROUTINE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Db"},
  {"ROUTINE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Name"},
  {"ROUTINE_TYPE", 9, MYSQL_TYPE_STRING, 0, 0, "Type"},
  {"DTD_IDENTIFIER", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"ROUTINE_BODY", 8, MYSQL_TYPE_STRING, 0, 0, 0},
  {"ROUTINE_DEFINITION", 65535, MYSQL_TYPE_STRING, 0, 1, 0},
  {"EXTERNAL_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"EXTERNAL_LANGUAGE", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"PARAMETER_STYLE", 8, MYSQL_TYPE_STRING, 0, 0, 0},
  {"IS_DETERMINISTIC", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {"SQL_DATA_ACCESS", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"SQL_PATH", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"SECURITY_TYPE", 7, MYSQL_TYPE_STRING, 0, 0, "Security_type"},
  {"CREATED", 0, MYSQL_TYPE_TIMESTAMP, 0, 0, "Created"},
  {"LAST_ALTERED", 0, MYSQL_TYPE_TIMESTAMP, 0, 0, "Modified"},
  {"SQL_MODE", 65535, MYSQL_TYPE_STRING, 0, 0, 0},
  {"ROUTINE_COMMENT", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Comment"},
  {"DEFINER", 77, MYSQL_TYPE_STRING, 0, 0, "Definer"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO stat_fields_info[]=
{
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Table"},
  {"NON_UNIQUE", 1, MYSQL_TYPE_LONG, 0, 0, "Non_unique"},
  {"INDEX_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"INDEX_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Key_name"},
  {"SEQ_IN_INDEX", 2, MYSQL_TYPE_LONG, 0, 0, "Seq_in_index"},
  {"COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Column_name"},
  {"COLLATION", 1, MYSQL_TYPE_STRING, 0, 1, "Collation"},
  {"CARDINALITY", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONG, 0, 1, "Cardinality"},
  {"SUB_PART", 3, MYSQL_TYPE_LONG, 0, 1, "Sub_part"},
  {"PACKED", 10, MYSQL_TYPE_STRING, 0, 1, "Packed"},
  {"NULLABLE", 3, MYSQL_TYPE_STRING, 0, 0, "Null"},
  {"INDEX_TYPE", 16, MYSQL_TYPE_STRING, 0, 0, "Index_type"},
  {"COMMENT", 16, MYSQL_TYPE_STRING, 0, 1, "Comment"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO view_fields_info[]=
{
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"VIEW_DEFINITION", 65535, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CHECK_OPTION", 8, MYSQL_TYPE_STRING, 0, 0, 0},
  {"IS_UPDATABLE", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {"DEFINER", 77, MYSQL_TYPE_STRING, 0, 0, 0},
  {"SECURITY_TYPE", 7, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO user_privileges_fields_info[]=
{
  {"GRANTEE", 81, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"PRIVILEGE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO schema_privileges_fields_info[]=
{
  {"GRANTEE", 81, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"PRIVILEGE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO table_privileges_fields_info[]=
{
  {"GRANTEE", 81, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"PRIVILEGE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO column_privileges_fields_info[]=
{
  {"GRANTEE", 81, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"PRIVILEGE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"IS_GRANTABLE", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO table_constraints_fields_info[]=
{
  {"CONSTRAINT_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"CONSTRAINT_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CONSTRAINT_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CONSTRAINT_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO key_column_usage_fields_info[]=
{
  {"CONSTRAINT_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"CONSTRAINT_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CONSTRAINT_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"ORDINAL_POSITION", 10 ,MYSQL_TYPE_LONG, 0, 0, 0},
  {"POSITION_IN_UNIQUE_CONSTRAINT", 10 ,MYSQL_TYPE_LONG, 0, 1, 0},
  {"REFERENCED_TABLE_SCHEMA", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"REFERENCED_TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"REFERENCED_COLUMN_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO table_names_fields_info[]=
{
  {"TABLE_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TABLE_SCHEMA",NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TABLE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Tables_in_"},
  {"TABLE_TYPE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Table_type"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO open_tables_fields_info[]=
{
  {"Database", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Database"},
  {"Table",NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Table"},
  {"In_use", 1, MYSQL_TYPE_LONG, 0, 0, "In_use"},
  {"Name_locked", 4, MYSQL_TYPE_LONG, 0, 0, "Name_locked"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO triggers_fields_info[]=
{
  {"TRIGGER_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"TRIGGER_SCHEMA",NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"TRIGGER_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Trigger"},
  {"EVENT_MANIPULATION", 6, MYSQL_TYPE_STRING, 0, 0, "Event"},
  {"EVENT_OBJECT_CATALOG", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"EVENT_OBJECT_SCHEMA",NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0},
  {"EVENT_OBJECT_TABLE", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, "Table"},
  {"ACTION_ORDER", 4, MYSQL_TYPE_LONG, 0, 0, 0},
  {"ACTION_CONDITION", 65535, MYSQL_TYPE_STRING, 0, 1, 0},
  {"ACTION_STATEMENT", 65535, MYSQL_TYPE_STRING, 0, 0, "Statement"},
  {"ACTION_ORIENTATION", 9, MYSQL_TYPE_STRING, 0, 0, 0},
  {"ACTION_TIMING", 6, MYSQL_TYPE_STRING, 0, 0, "Timing"},
  {"ACTION_REFERENCE_OLD_TABLE", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"ACTION_REFERENCE_NEW_TABLE", NAME_LEN, MYSQL_TYPE_STRING, 0, 1, 0},
  {"ACTION_REFERENCE_OLD_ROW", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {"ACTION_REFERENCE_NEW_ROW", 3, MYSQL_TYPE_STRING, 0, 0, 0},
  {"CREATED", 0, MYSQL_TYPE_TIMESTAMP, 0, 1, "Created"},
  {"SQL_MODE", 65535, MYSQL_TYPE_STRING, 0, 0, "sql_mode"},
  {"DEFINER", 65535, MYSQL_TYPE_STRING, 0, 0, "Definer"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


ST_FIELD_INFO variables_fields_info[]=
{
  {"Variable_name", 80, MYSQL_TYPE_STRING, 0, 0, "Variable_name"},
  {"Value", FN_REFLEN, MYSQL_TYPE_STRING, 0, 0, "Value"},
  {0, 0, MYSQL_TYPE_STRING, 0, 0, 0}
};


/*
  Description of ST_FIELD_INFO in table.h
*/

ST_SCHEMA_TABLE schema_tables[]=
{
  {"CHARACTER_SETS", charsets_fields_info, create_schema_table, 
   fill_schema_charsets, make_character_sets_old_format, 0, -1, -1, 0},
  {"COLLATIONS", collation_fields_info, create_schema_table, 
   fill_schema_collation, make_old_format, 0, -1, -1, 0},
  {"COLLATION_CHARACTER_SET_APPLICABILITY", coll_charset_app_fields_info,
   create_schema_table, fill_schema_coll_charset_app, 0, 0, -1, -1, 0},
  {"COLUMNS", columns_fields_info, create_schema_table, 
   get_all_tables, make_columns_old_format, get_schema_column_record, 1, 2, 0},
  {"COLUMN_PRIVILEGES", column_privileges_fields_info, create_schema_table,
    fill_schema_column_privileges, 0, 0, -1, -1, 0},
  {"KEY_COLUMN_USAGE", key_column_usage_fields_info, create_schema_table,
    get_all_tables, 0, get_schema_key_column_usage_record, 4, 5, 0},
  {"OPEN_TABLES", open_tables_fields_info, create_schema_table,
   fill_open_tables, make_old_format, 0, -1, -1, 1},
  {"ROUTINES", proc_fields_info, create_schema_table, 
    fill_schema_proc, make_proc_old_format, 0, -1, -1, 0},
  {"SCHEMATA", schema_fields_info, create_schema_table,
   fill_schema_shemata, make_schemata_old_format, 0, 1, -1, 0},
  {"SCHEMA_PRIVILEGES", schema_privileges_fields_info, create_schema_table,
    fill_schema_schema_privileges, 0, 0, -1, -1, 0},
  {"STATISTICS", stat_fields_info, create_schema_table, 
    get_all_tables, make_old_format, get_schema_stat_record, 1, 2, 0},
  {"STATUS", variables_fields_info, create_schema_table, fill_status, 
   make_old_format, 0, -1, -1, 1},
  {"TABLES", tables_fields_info, create_schema_table, 
   get_all_tables, make_old_format, get_schema_tables_record, 1, 2, 0},
  {"TABLE_CONSTRAINTS", table_constraints_fields_info, create_schema_table,
    get_all_tables, 0, get_schema_constraints_record, 3, 4, 0},
  {"TABLE_NAMES", table_names_fields_info, create_schema_table,
   get_all_tables, make_table_names_old_format, 0, 1, 2, 1},
  {"TABLE_PRIVILEGES", table_privileges_fields_info, create_schema_table,
    fill_schema_table_privileges, 0, 0, -1, -1, 0},
  {"TRIGGERS", triggers_fields_info, create_schema_table,
   get_all_tables, make_old_format, get_schema_triggers_record, 5, 6, 0},
  {"USER_PRIVILEGES", user_privileges_fields_info, create_schema_table, 
    fill_schema_user_privileges, 0, 0, -1, -1, 0},
  {"VARIABLES", variables_fields_info, create_schema_table, fill_variables,
   make_old_format, 0, -1, -1, 1},
  {"VIEWS", view_fields_info, create_schema_table, 
    get_all_tables, 0, get_schema_views_record, 1, 2, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0}
};


#ifdef HAVE_EXPLICIT_TEMPLATE_INSTANTIATION
template class List_iterator_fast<char>;
template class List<char>;
#endif