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Bug#11765713 58705: OPTIMIZER LET ENGINE DEPEND ON UNINITIALIZED VALUES CREATED BY OPT_SUM_QU

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Valgrind warnings were caused by comparing index values to an un-initialized field.


mysql-test/r/subselect.result:
  New test cases.
mysql-test/t/subselect.test:
  New test cases.
sql/opt_sum.cc:
  Add thd to opt_sum_query enabling it to test for errors.
  If we have a non-nullable index, we cannot use it to match null values,
  since set_null() will be ignored, and we might compare uninitialized data.
sql/sql_select.cc:
  Add thd to opt_sum_query, enabling it to test for errors.
sql/sql_select.h:
  Add thd to opt_sum_query, enabling it to test for errors.
This commit is contained in:
Tor Didriksen
2011-04-14 16:35:24 +02:00
parent 7634e724e7
commit dd3d9477b2
5 changed files with 74 additions and 14 deletions
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2
sql/sql_select.cc
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@ -961,7 +961,7 @@ JOIN::optimize()
If all items were resolved by opt_sum_query, there is no need to
open any tables.
*/
if ((res=opt_sum_query(select_lex->leaf_tables, all_fields, conds)))
if ((res=opt_sum_query(thd, select_lex->leaf_tables, all_fields, conds)))
{
if (res == HA_ERR_KEY_NOT_FOUND)
{