remove handlerton::find_files (new implementation is coming),

and handlerton::table_exists_in_engine (new implementation is coming),
and handlerton::license (redundant)

sql/handler.cc

@@ -4371,96 +4371,6 @@ int ha_discover(THD *thd, const char *db, const char *name,
 }
 
 
-/**
-  Call this function in order to give the handler the possiblity
-  to ask engine if there are any new tables that should be written to disk
-  or any dropped tables that need to be removed from disk
-*/
-struct st_find_files_args
-{
-  const char *db;
-  const char *path;
-  const char *wild;
-  bool dir;
-  List<LEX_STRING> *files;
-};
-
-static my_bool find_files_handlerton(THD *thd, plugin_ref plugin,
-                                   void *arg)
-{
-  st_find_files_args *vargs= (st_find_files_args *)arg;
-  handlerton *hton= plugin_data(plugin, handlerton *);
-
-
-  if (hton->state == SHOW_OPTION_YES && hton->find_files)
-      if (hton->find_files(hton, thd, vargs->db, vargs->path, vargs->wild, 
-                          vargs->dir, vargs->files))
-        return TRUE;
-
-  return FALSE;
-}
-
-int
-ha_find_files(THD *thd,const char *db,const char *path,
-	      const char *wild, bool dir, List<LEX_STRING> *files)
-{
-  int error= 0;
-  DBUG_ENTER("ha_find_files");
-  DBUG_PRINT("enter", ("db: '%s'  path: '%s'  wild: '%s'  dir: %d", 
-		       db, path, wild, dir));
-  st_find_files_args args= {db, path, wild, dir, files};
-
-  plugin_foreach(thd, find_files_handlerton,
-                 MYSQL_STORAGE_ENGINE_PLUGIN, &args);
-  /* The return value is not currently used */
-  DBUG_RETURN(error);
-}
-
-/**
-  Ask handler if the table exists in engine.
-  @retval
-    HA_ERR_NO_SUCH_TABLE     Table does not exist
-  @retval
-    HA_ERR_TABLE_EXIST       Table exists
-  @retval
-    \#                  Error code
-*/
-struct st_table_exists_in_engine_args
-{
-  const char *db;
-  const char *name;
-  int err;
-};
-
-static my_bool table_exists_in_engine_handlerton(THD *thd, plugin_ref plugin,
-                                   void *arg)
-{
-  st_table_exists_in_engine_args *vargs= (st_table_exists_in_engine_args *)arg;
-  handlerton *hton= plugin_data(plugin, handlerton *);
-
-  int err= HA_ERR_NO_SUCH_TABLE;
-
-  if (hton->state == SHOW_OPTION_YES && hton->table_exists_in_engine)
-    err = hton->table_exists_in_engine(hton, thd, vargs->db, vargs->name);
-
-  vargs->err = err;
-  if (vargs->err == HA_ERR_TABLE_EXIST)
-    return TRUE;
-
-  return FALSE;
-}
-
-int ha_table_exists_in_engine(THD* thd, const char* db, const char* name)
-{
-  DBUG_ENTER("ha_table_exists_in_engine");
-  DBUG_PRINT("enter", ("db: %s, name: %s", db, name));
-  st_table_exists_in_engine_args args= {db, name, HA_ERR_NO_SUCH_TABLE};
-  plugin_foreach(thd, table_exists_in_engine_handlerton,
-                 MYSQL_STORAGE_ENGINE_PLUGIN, &args);
-  DBUG_PRINT("exit", ("error: %d", args.err));
-  DBUG_RETURN(args.err);
-}
-
 #ifdef HAVE_NDB_BINLOG
 /*
   TODO: change this into a dynamic struct

sql/handler.h

@@ -1079,14 +1079,6 @@ struct handlerton
                    const char *name,
                    uchar **frmblob, 
                    size_t *frmlen);
-   int (*find_files)(handlerton *hton, THD *thd,
-                     const char *db,
-                     const char *path,
-                     const char *wild, bool dir, List<LEX_STRING> *files);
-   int (*table_exists_in_engine)(handlerton *hton, THD* thd, const char *db,
-                                 const char *name);
-
-   uint32 license; /* Flag for Engine License */
    /*
      Optional clauses in the CREATE/ALTER TABLE
    */
@@ -3041,9 +3033,6 @@ bool ha_check_if_table_exists(THD* thd, const char *db, const char *name,
                              bool *exists);
 int ha_discover(THD* thd, const char* dbname, const char* name,
                 uchar** frmblob, size_t* frmlen);
-int ha_find_files(THD *thd,const char *db,const char *path,
-                  const char *wild, bool dir, List<LEX_STRING>* files);
-int ha_table_exists_in_engine(THD* thd, const char* db, const char* name);
 
 /* key cache */
 extern "C" int ha_init_key_cache(const char *name, KEY_CACHE *key_cache, void *);

sql/sql_show.cc

@@ -833,8 +833,6 @@ find_files(THD *thd, List<LEX_STRING> *files, const char *db,
   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);
 }
 
@@ -3889,13 +3887,6 @@ make_table_name_list(THD *thd, List<LEX_STRING> *table_names, LEX *lex,
     {
       if (table_names->push_back(&lookup_field_vals->table_value))
         return 1;
-      /*
-        Check that table is relevant in current transaction.
-        (used for ndb engine, see ndbcluster_find_files(), ha_ndbcluster.cc)
-      */
-      (void) ha_find_files(thd, db_name->str, path,
-                         lookup_field_vals->table_value.str, 0,
-                         table_names);
     }
     return 0;
   }

sql/sql_table.cc

@@ -4421,24 +4421,14 @@ bool mysql_create_table_no_lock(THD *thd,
   {
     bool create_if_not_exists =
       create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS;
-    int retcode = ha_table_exists_in_engine(thd, db, table_name);
-    DBUG_PRINT("info", ("exists_in_engine: %u",retcode));
-    switch (retcode)
+    bool exists_in_engine;
+    ha_check_if_table_exists(thd, db, table_name, &exists_in_engine);
+    if (exists_in_engine)
     {
-      case HA_ERR_NO_SUCH_TABLE:
-        /* Normal case, no table exists. we can go and create it */
-        break;
-      case HA_ERR_TABLE_EXIST:
-        DBUG_PRINT("info", ("Table existed in handler"));
-
-        if (create_if_not_exists)
-          goto warn;
-        my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
-        goto err;
-      default:
-        DBUG_PRINT("info", ("error: %u from storage engine", retcode));
-        my_error(retcode, MYF(0),table_name);
-        goto err;
+      if (create_if_not_exists)
+        goto warn;
+      my_error(ER_TABLE_EXISTS_ERROR, MYF(0), table_name);
+      goto err;
     }
   }