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Bug#11766594 59736: SELECT DISTINCT.. INCORRECT RESULT WITH DETERMINISTIC FUNCTION IN WHERE C

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There is an optimization of DISTINCT in JOIN::optimize()
which depends on THD::used_tables value. Each SELECT statement
inside SP resets used_tables value(see mysql_select()) and it
leads to wrong result. The fix is to replace THD::used_tables
with LEX::used_tables.
This commit is contained in:
Sergey Glukhov
2011-08-02 11:33:45 +04:00
parent 7841c3f574
commit de3693a1cd
10 changed files with 69 additions and 20 deletions
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4
sql/sql_insert.cc
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@ -631,7 +631,7 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
lock_type= table_list->lock_type;
thd_proc_info(thd, "init");
thd->used_tables=0;
thd->lex->used_tables=0;
values= its++;
value_count= values->elements;
@ -779,7 +779,7 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list,
}
else
{
if (thd->used_tables) // Column used in values()
if (thd->lex->used_tables) // Column used in values()
restore_record(table,s->default_values); // Get empty record
else
{