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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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1
sql/sql_class.cc
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@@ -649,7 +649,6 @@ THD::THD()
is_slave_error= thread_specific_used= FALSE;
hash_clear(&handler_tables_hash);
tmp_table=0;
used_tables=0;
cuted_fields= sent_row_count= row_count= 0L;
limit_found_rows= 0;
row_count_func= -1;