a second time". The bug was caused by incompatibility of
negations elimination algorithm and PS: during first statement
execute a subtree with negation was replaced with equivalent
subtree without NOTs.
The problem was that although this transformation was permanent,
items of the new subtree were created in execute-local memory.
The patch adds means to check if it is the first execute of a
prepared statement, and if this is the case, to allocate items
in memory of the prepared statement.
The implementation:
- backports Item_arena from 5.0
- adds Item_arena::is_stmt_prepare(),
Item_arena::is_first_stmt_execute().
- deletes THD::allocate_temporary_pool_for_ps_preparing(),
THD::free_temporary_pool_for_ps_preparing(); they
were redundant.
and adds a few invariants:
- thd->free_list never contains junk (= freed items)
- thd->current_arena is never null. If there is no
prepared statement, it points at the thd.
The rest of the patch contains mainly mechanical changes and
cleanups.
mysql-test/r/ps.result:
Test results updated (test case for Bug#4912)
mysql-test/t/ps.test:
A test case for Bug#4912 "mysqld crashs in case a statement is
executed a second time"
sql/item_cmpfunc.cc:
current_statement -> current_arena
sql/item_subselect.cc:
Statement -> Item_arena, current_statement -> current_arena
sql/item_subselect.h:
Item_subselect does not need to save thd->current_statement.
sql/item_sum.cc:
Statement -> Item_arena
sql/item_sum.h:
Statement -> Item_arena
sql/mysql_priv.h:
Statement -> Item_arena
sql/sql_base.cc:
current_statement -> current_arena
sql/sql_class.cc:
- Item_arena
- convenient set_n_backup_statement, restore_backup_statement
(nice idea, Sanja)
sql/sql_class.h:
- Item_arena: backport from 5.0
- allocate_temporary_pool_for_ps_preparing,
free_temporary_pool_for_ps_preparing removed.
sql/sql_derived.cc:
current_statement -> current_arena
sql/sql_lex.cc:
current_statement -> current_arena
sql/sql_parse.cc:
Deploy invariant that thd->free_list never contains junk items
(backport from 5.0).
sql/sql_prepare.cc:
- backporting Item_arena
- no need to allocate_temporary_pool_for_ps_preparing().
sql/sql_select.cc:
Fix for bug#4912 "mysqld crashs in case a statement is
executed a second time": if this is the first execute of
a prepared statement, negation elimination is
done in memory of the prepared statement.
sql/sql_union.cc:
Backporting Item_arena from 5.0.
mysql-test/r/func_group.result:
fixed
mysql-test/r/ps.result:
SHOW TABLE STATUS test
mysql-test/t/ps.test:
SHOW TABLE STATUS test
sql/sql_parse.cc:
Use lex->describe instead of lex->select_lex.options
sql/sql_yacc.yy:
removed unneed initialization of lex->select_lex.options
mysql-test/r/ps.result:
parameters from variables (for field creation)
mysql-test/t/ps.test:
parameters from variables (for field creation)
sql/item.cc:
type of parameter assignment for parameters from variables
sql/item.h:
removed spaces at line ends in Item_param definition
mysql-test/r/ps.result:
test of prepared EXPLAIN
mysql-test/t/ps.test:
fix layout and table removing of previous tests
test of prepared EXPLAIN
sql/sql_prepare.cc:
explain pave to be prepared, too
cleanup options after explain execution
sql/sql_select.cc:
removed unneed assignment
mysql-test/r/ps.result:
New test case for BUG#3486.
mysql-test/t/ps.test:
New test case for BUG#3486.
sql/item_create.cc:
Create an Item_func_found_rows() at parse time, not an Item_int.
sql/item_func.cc:
Added val_int() method for new Item_func_found_rows class.
sql/item_func.h:
New class Item_func_found_rows for FOUND_ROWS() function.
sql/sql_select.cc:
Don't reset thd->limit_found_rows too early, or FOUND_ROWS() wont work.
character set introducer": add new item type to be returned before from
Item_param until it's value is set.
This way items like Item_bool_func2 and udf_handler won't treat this item
as constant literal when statement is prepared.
mysql-test/r/ps.result:
Test results fixed (test case for bug #4105)
mysql-test/t/ps.test:
Followup to bug #4105: a test case.
sql/item.cc:
Fix for bug#4105 "Server crash on attempt to prepare a statement with
character set introducer": add new item type to be returned before from
Item_param until it's value is set.
sql/item.h:
Fix for bug#4105 "Server crash on attempt to prepare a statement with
character set introducer": add new item type to be returned before from
Item_param until it's value is set.
mysql-test/r/ps.result:
Added tests for PREPARE stmt1 FROM @var syntax
mysql-test/t/ps.test:
Added tests for PREPARE stmt1 FROM @var syntax
mysys/my_error.c:
Added support for "%.*s" format
sql/item.cc:
Removed one redundant Item_param::set_value function
sql/item.h:
Removed one redundant Item_param::set_value function
sql/mysqld.cc:
Reformmated the code
sql/share/czech/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/dutch/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/english/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/estonian/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/french/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/german/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/greek/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/hungarian/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/italian/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/japanese/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/korean/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/norwegian-ny/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/norwegian/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/polish/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/portuguese/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/romanian/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/russian/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/slovak/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/spanish/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/swedish/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/share/ukrainian/errmsg.txt:
Changed ER_UNKNOWN_STMT_HANDLER format string
sql/sql_class.h:
SQL Prepared statements now can't be used by binary protocol commands
sql/sql_lex.h:
Added support for PREPARE stmt1 FROM @var syntax.
sql/sql_parse.cc:
Added support for PREPARE stmt1 FROM @var syntax.
sql/sql_prepare.cc:
Code cleanup
sql/sql_yacc.yy:
Added support for PREPARE stmt1 FROM @var syntax.
mysql-test/r/ps.result:
Added check if multiple SQL statements inside a PS are disabled
mysql-test/t/ps.test:
Added check if multiple SQL statements inside a PS are disabled
