5 Commits

Author	SHA1	Message	Date
Sergei Petrunia	b1f828a82a	MDEV-19134: EXISTS() slower if ORDER BY is defined ... Step 1: Removal of ORDER BY [LIMIT] from the subquery should be done earlier and for broader class of subqueries. The rewrite was done in Item_in_subselect::select_in_like_transformer(), but this had problems: - It didn't cover EXISTS subqueries - It covered IN-subqueries, but was done after the semi-join transformation was considered inapplicable, because ORDER BY was present. Remaining issue: - EXISTS->IN transformation happens before check_and_do_in_subquery_rewrites() is called, so it is still prevented by the present ORDER BY.	2019-05-16 13:03:58 +03:00
Varun Gupta	93c360e3a5	MDEV-15253: Default optimizer setting changes for MariaDB 10.4 ... use_stat_tables= PREFERABLY optimizer_use_condition_selectivity= 4	2018-12-09 09:22:00 +05:30
Marko Mäkelä	05459706f2	Merge 10.2 into 10.3	2018-08-03 15:57:23 +03:00
Sergei Golubchik	36e59752e7	Merge branch '10.2' into 10.3	2018-06-30 16:39:20 +02:00
Michael Widenius	a7abddeffa	Create 'main' test directory and move 't' and 'r' there	2018-03-29 13:59:44 +03:00