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Author SHA1 Message Date
Igor Babaev
bef20b5f36 MDEV-30538 Plans for SELECT and multi-table UPDATE/DELETE unexpectedly differ 
This patch allowed transformation of EXISTS subqueries into equivalent
IN predicands at the top level of WHERE conditions for multi-table UPDATE
and DELETE statements. There was no reason to prohibit the transformation
for such statements. The transformation provides more opportunities of
using semi-join optimizations.

Approved by Oleksandr Byelkin <sanja@mariadb.com>
 2023-02-03 11:17:03 -08:00
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
Michael Widenius
a7abddeffa Create 'main' test directory and move 't' and 'r' there 2018-03-29 13:59:44 +03:00
Renamed from mysql-test/r/update_use_source.result (Browse further)