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Author	SHA1	Message	Date
unknown	813fc4104e	A fix and a test case for Bug#6513 "Test Suite: Values inserted by using cursor is interpreted latin1 character and Bug#9819 "Cursors: Mysql Server Crash while fetching from table with 5 million records." A fix for a possible memory leak when fetching into an SP cursor in a long loop. The patch uses a common implementation of cursors in the binary protocol and in stored procedures and implements materialized cursors. For implementation details, see comments in sql_cursor.cc include/my_sys.h: - declaration for multi_alloc_root libmysqld/Makefile.am: - drop protocol_cursor.cc, add sql_cursor.cc (replaces the old implementation of cursors with a new one) mysql-test/r/ctype_ujis.result: - test results fixed (a test case for Bug#6513) mysql-test/r/sp-big.result: - test results fixed (a test case for Bug#9819) mysql-test/t/ctype_ujis.test: Add a test case for Bug#6513 "Test Suite: Values inserted by using cursor is interpreted latin1 character" mysql-test/t/sp-big.test: Add a restricted test case for Bug#9819 "Cursors: Mysql Server Crash while fetching from table with 5 million records." mysys/my_alloc.c: - an implementation of multi_alloc_root; this is largely a copy-paste from mulalloc.c, but the function is small and there is no easy way to reuse the existing C function. sql/Makefile.am: - add sql_cursor.h, sql_cursor.cc (a new implementation of stored procedure cursors) and drop protocol_cursor.cc (the old one) sql/handler.cc: - now TABLE object has its mem_root always initialized. Adjust the implementation handler::ha_open sql/item_subselect.cc: - adjust to the changed declaration of st_select_lex_unit::prepare sql/protocol.h: - drop Protocol_cursor sql/sp_head.cc: - move juggling with Query_arena::free_list and Item::next to sp_eval_func_item, as this is needed in 3 places already. sql/sp_head.h: - declare a no-op implementation for cleanup_stmt in sp_instr_cpush. This method is needed for non-materializing cursors, which are yet not used in stored procedures. - declaration for sp_eval_func_item sql/sp_rcontext.cc: - reimplement sp_cursor using the new implementation of server side cursors. - use sp_eval_func_item to assign values of SP variables from the row fetched from a cursor. This should fix a possible memory leak in the old implementation of sp_cursor::fetch sql/sp_rcontext.h: - reimplement sp_cursor using the new implementation of server side cursors. sql/sql_class.cc: - disable the functionality that closes transient cursors at commit/rollback; transient cursors are not used in 5.0, instead we use materialized ones. To be enabled in a later version. sql/sql_class.h: - adjust to the rename Cursor -> Server_side_cursor - additional declarations of select_union used in materialized cursors sql/sql_derived.cc: - reuse bits of tmp table code in UNION, derived tables, and materialized cursors - cleanup comments sql/sql_lex.h: - declarations of auxiliary methods used by materialized cursors - a cleanup in st_select_lex_unit interface sql/sql_list.h: - add an array operator new[] to class Sql_alloc sql/sql_prepare.cc: - split the tight coupling of cursors and prepared statements to reuse the same implementation in stored procedures - cleanups of error processing in Prepared_statement::{prepare,execute} sql/sql_select.cc: - move the implementation of sensitive (non-materializing) cursors to sql_cursor.cc - make temporary tables self-contained: the table, its record and fields are allocated in TABLE::mem_root. This implementation is not clean and resets thd->mem_root several times because of the way create_tmp_table works (many additional things are done inside it). - adjust to the changed declaration of st_select_lex_unit::prepare sql/sql_select.h: - move the declaration of sensitive (non-materializing) cursors to sql_cursor.cc sql/sql_union.cc: - move pieces of st_select_unit::prepare to select_union and st_table methods to be able to reuse code in the implementation of materialized cursors sql/sql_view.cc: - adjust to the changed signature of st_select_lex_unit::prepare sql/table.cc: - implement auxiliary st_table methods for use with temporary tables sql/table.h: - add declarations for auxiliary methods of st_table used to work with temporary tables tests/mysql_client_test.c: - if cursors are materialized, a parallel update of the table used in the cursor may go through: update the test. sql/sql_cursor.cc: New BitKeeper file ``sql/sql_cursor.cc'' -- implementation of server side cursors sql/sql_cursor.h: New BitKeeper file ``sql/sql_cursor.h'' - declarations for server side cursors.	21 years ago

Author

SHA1

Message

Date

unknown

813fc4104e

A fix and a test case for Bug#6513 "Test Suite: Values inserted by using

cursor is interpreted latin1 character and Bug#9819 "Cursors: Mysql Server
Crash while fetching from table with 5 million records."
A fix for a possible memory leak when fetching into an SP cursor
in a long loop.
The patch uses a common implementation of cursors in the binary protocol and 
in stored procedures and implements materialized cursors.
For implementation details, see comments in sql_cursor.cc


include/my_sys.h:
  - declaration for multi_alloc_root
libmysqld/Makefile.am:
  - drop protocol_cursor.cc, add sql_cursor.cc (replaces the old
  implementation of cursors with a new one)
mysql-test/r/ctype_ujis.result:
  - test results fixed (a test case for Bug#6513)
mysql-test/r/sp-big.result:
  - test results fixed (a test case for Bug#9819)
mysql-test/t/ctype_ujis.test:
  Add a test case for Bug#6513 "Test Suite: Values inserted by using cursor is
   interpreted latin1 character"
mysql-test/t/sp-big.test:
  Add a restricted test case for Bug#9819 "Cursors: Mysql Server Crash
  while fetching from table with 5 million records."
mysys/my_alloc.c:
  - an implementation of multi_alloc_root; this is largely a copy-paste
    from mulalloc.c, but the function is small and there is no easy way
    to reuse the existing C function.
sql/Makefile.am:
  - add sql_cursor.h, sql_cursor.cc (a new implementation of stored procedure
  cursors) and drop protocol_cursor.cc (the old one)
sql/handler.cc:
  - now TABLE object has its mem_root always initialized.
    Adjust the implementation handler::ha_open
sql/item_subselect.cc:
  - adjust to the changed declaration of st_select_lex_unit::prepare
sql/protocol.h:
  - drop Protocol_cursor
sql/sp_head.cc:
  - move juggling with Query_arena::free_list and Item::next to
    sp_eval_func_item, as this is needed in 3 places already.
sql/sp_head.h:
  - declare a no-op implementation for cleanup_stmt in sp_instr_cpush.
    This method is needed for non-materializing cursors, which are yet not 
    used in stored procedures.
  - declaration for sp_eval_func_item
sql/sp_rcontext.cc:
  - reimplement sp_cursor using the new implementation of server side cursors.
  - use sp_eval_func_item to assign values of SP variables from the
    row fetched from a cursor. This should fix a possible memory leak in 
    the old implementation of sp_cursor::fetch
sql/sp_rcontext.h:
  - reimplement sp_cursor using the new implementation of server side cursors.
sql/sql_class.cc:
  - disable the functionality that closes transient cursors at commit/rollback;
    transient cursors are not used in 5.0, instead we use materialized ones.
    To be enabled in a later version.
sql/sql_class.h:
  - adjust to the rename Cursor -> Server_side_cursor
  - additional declarations of select_union used in materialized cursors
sql/sql_derived.cc:
  - reuse bits of tmp table code in UNION, derived tables, and materialized
    cursors
  - cleanup comments
sql/sql_lex.h:
  - declarations of auxiliary methods used by materialized cursors
  - a cleanup in st_select_lex_unit interface
sql/sql_list.h:
  - add an array operator new[] to class Sql_alloc
sql/sql_prepare.cc:
  - split the tight coupling of cursors and prepared statements to reuse 
    the same implementation in stored procedures
  - cleanups of error processing in Prepared_statement::{prepare,execute}
sql/sql_select.cc:
  - move the implementation of sensitive (non-materializing) cursors to 
    sql_cursor.cc
  - make temporary tables self-contained: the table, its record and fields
    are allocated in TABLE::mem_root. This implementation is not clean
    and resets thd->mem_root several times because of the way create_tmp_table 
    works (many additional things are done inside it).
  - adjust to the changed declaration of st_select_lex_unit::prepare
sql/sql_select.h:
  - move the declaration of sensitive (non-materializing) cursors to 
    sql_cursor.cc
sql/sql_union.cc:
  - move pieces of st_select_unit::prepare to select_union and st_table
    methods to be able to reuse code in the implementation of materialized
    cursors
sql/sql_view.cc:
  - adjust to the changed signature of st_select_lex_unit::prepare
sql/table.cc:
  - implement auxiliary st_table methods for use with temporary tables
sql/table.h:
  - add declarations for auxiliary methods of st_table used to work with 
   temporary tables
tests/mysql_client_test.c:
  - if cursors are materialized, a parallel update of the table used
    in the cursor may go through: update the test.
sql/sql_cursor.cc:
  New BitKeeper file ``sql/sql_cursor.cc'' -- implementation of server side
  cursors
sql/sql_cursor.h:
  New BitKeeper file ``sql/sql_cursor.h'' - declarations for
  server side cursors.

21 years ago

1 Commits (2a7cf59fc92ce322671bb687e2941275dd23d1c5)