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Merged from 5.0 (enterprise).

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This commit is contained in:
Chad MILLER
2008-12-17 15:01:34 -05:00
parent ca7f3f2ae0 3742489c37
commit 1c73da70ce
267 changed files with 9325 additions and 2462 deletions
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63
sql/sql_update.cc
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@ -358,7 +358,7 @@ int mysql_update(THD *thd,
Full index scan must be started with init_read_record_idx
*/
if (used_index == MAX_KEY || (select && select->quick))
init_read_record(&info,thd,table,select,0,1);
init_read_record(&info, thd, table, select, 0, 1, FALSE);
else
init_read_record_idx(&info, thd, table, 1, used_index);
@ -422,7 +422,7 @@ int mysql_update(THD *thd,
if (select && select->quick && select->quick->reset())
goto err;
init_read_record(&info,thd,table,select,0,1);
init_read_record(&info, thd, table, select, 0, 1, FALSE);
updated= found= 0;
thd->count_cuted_fields= CHECK_FIELD_WARN; /* calc cuted fields */
@ -852,11 +852,14 @@ reopen_tables:
}
/* now lock and fill tables */
if (lock_tables(thd, table_list, table_count, &need_reopen))
if (!thd->stmt_arena->is_stmt_prepare() &&
lock_tables(thd, table_list, table_count, &need_reopen))
{
if (!need_reopen)
DBUG_RETURN(TRUE);
DBUG_PRINT("info", ("lock_tables failed, reopening"));
/*
We have to reopen tables since some of them were altered or dropped
during lock_tables() or something was done with their triggers.
@ -872,6 +875,34 @@ reopen_tables:
for (TABLE_LIST *tbl= table_list; tbl; tbl= tbl->next_global)
tbl->cleanup_items();
/*
To not to hog memory (as a result of the
unit->reinit_exec_mechanism() call below):
*/
lex->unit.cleanup();
for (SELECT_LEX *sl= lex->all_selects_list;
sl;
sl= sl->next_select_in_list())
{
SELECT_LEX_UNIT *unit= sl->master_unit();
unit->reinit_exec_mechanism(); // reset unit->prepared flags
/*
Reset 'clean' flag back to force normal execution of
unit->cleanup() in Prepared_statement::cleanup_stmt()
(call to lex->unit.cleanup() above sets this flag to TRUE).
*/
unit->unclean();
}
/*
Also we need to cleanup Natural_join_column::table_field items.
To not to traverse a join tree we will cleanup whole
thd->free_list (in PS execution mode that list may not contain
items from 'fields' list, so the cleanup above is necessary to.
*/
cleanup_items(thd->free_list);
close_tables_for_reopen(thd, &table_list);
goto reopen_tables;
}
@ -1218,6 +1249,32 @@ multi_update::initialize_tables(JOIN *join)
}
}
/*
enable uncacheable flag if we update a view with check option
and check option has a subselect, otherwise, the check option
can be evaluated after the subselect was freed as independent
(See full_local in JOIN::join_free()).
*/
if (table_ref->check_option && !join->select_lex->uncacheable)
{
SELECT_LEX_UNIT *tmp_unit;
SELECT_LEX *sl;
for (tmp_unit= join->select_lex->first_inner_unit();
tmp_unit;
tmp_unit= tmp_unit->next_unit())
{
for (sl= tmp_unit->first_select(); sl; sl= sl->next_select())
{
if (sl->master_unit()->item)
{
join->select_lex->uncacheable|= UNCACHEABLE_CHECKOPTION;
goto loop_end;
}
}
}
}
loop_end:
if (table == first_table_for_update && table_ref->check_option)
{
table_map unupdated_tables= table_ref->check_option->used_tables() &