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Code Activity

MWL#89: Cost-based choice between Materialization and IN->EXISTS transformation

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- Added more tests to the MWL#89 specific test, and made the test more modular.
- Updated test files.
- Fixed a memory leak.
- More comments.

mysql-test/r/subselect_mat.result:
  - Updated the test file to reflect the new optimizer switches related to
    materialized subquery execution.
  - Added one extra test to test all cases that expose BUG#40037 (this is an old bug from 5.x).
  - Updated the test result with correct results that expose BUG#40037.
mysql-test/t/subselect_mat.test:
  - Updated the test file to reflect the new optimizer switches related to
    materialized subquery execution.
  - Added one extra test to test all cases that expose BUG#40037 (this is an old bug from 5.x).
  - Updated the test result with correct results that expose BUG#40037.
sql/sql_select.cc:
  Fixed a memory leak reported by Valgrind.
This commit is contained in:
unknown
2010-10-20 15:43:55 +03:00
parent addd57828d
commit e85a4cb6b5
7 changed files with 3972 additions and 325 deletions
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6
sql/sql_select.cc
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@@ -19372,12 +19372,6 @@ int JOIN::reoptimize(Item *added_where, table_map join_tables,
DYNAMIC_ARRAY added_keyuse;
SARGABLE_PARAM *sargables= 0; /* Used only as a dummy parameter. */
if (my_init_dynamic_array(&added_keyuse, sizeof(KEYUSE), 20, 64))
{
delete_dynamic(&added_keyuse);
return 1;
}
/* Re-run the REF optimizer to take into account the new conditions. */
if (update_ref_and_keys(thd, &added_keyuse, join_tab, tables, added_where,
~outer_join, select_lex, &sargables))