database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-01 03:47:19 +03:00
Code Activity

LP BUG#823169 fix.

Browse Source 
For ANY subqueries NULLs should be ignored (if there is other values) when finding max min.
For ALL subqueries NULLs should be saved if they found.

Optimisation for ALL suqbueries if NULL is possible in the SELECT list with max/min aggregate function switched off.

Some test changed where NULL is not used but optimization with max/min aggregate function important so NOT NULL added.

mysql-test/r/explain.result:
  Forced old optimization.
mysql-test/r/subselect.result:
  Forced old optimization.
  
  New test suite.
mysql-test/t/explain.test:
  Forced old optimization.
mysql-test/t/subselect.test:
  Forced old optimization.
  
  New test suite.
sql/item_subselect.cc:
  Store converted subquery type.
  
  Switch off aggregate function optimisation for ALL and nulls.
sql/sql_class.cc:
  Fixed NULL comparison.
sql/sql_class.h:
  Store converted subquery type.
This commit is contained in:
unknown
2011-09-02 10:11:13 +03:00
parent 31c8c95bb2
commit 37a8497d49
7 changed files with 442 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
mysql-test/t/explain.test
View File

@ -152,7 +152,7 @@ DROP TABLE t1;
--echo # explain extended crash with subquery and ONLY_FULL_GROUP_BY sql_mode
--echo #
CREATE TABLE t1 (f1 INT);
CREATE TABLE t1 (f1 INT not null);
SELECT @@session.sql_mode INTO @old_sql_mode;
SET SESSION sql_mode='ONLY_FULL_GROUP_BY';