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Set new default values for the optimizer switch flags 'derived_merge'

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and 'derived_with_keys'. Now they are set on by default.
This commit is contained in:
Igor Babaev
2011-11-26 14:23:00 -08:00
parent d84ea521c5
commit 17b4e4a194
49 changed files with 208 additions and 21 deletions
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6
mysql-test/suite/innodb/r/innodb_lock_wait_timeout_1.result
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@ -97,6 +97,8 @@ insert into t1 values (1,1), (2,null), (3,1), (4,1),
# Demonstrate that for the SELECT statement
# used later in the test JT_EQ_REF access method is used.
#
set @tmp_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=off,derived_with_keys=off';
explain
select 1 from t1 natural join (select 2 as a, 1 as b union all
select 2 as a, 2 as b) as t2 for update;
@ -150,6 +152,7 @@ key_len NULL
ref NULL
rows NULL
Extra
set optimizer_switch=@tmp_optimizer_switch;
#
# Demonstrate that the reported SELECT statement
# no longer produces warnings.
@ -301,6 +304,8 @@ begin;
# is retreived and processed first.
#
# Verify that JT_EQ_REF is used.
set @tmp_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=off,derived_with_keys=off';
explain
select 1 from t1 natural join (select 3 as a, 2 as b union all
select 3 as a, 1 as b) as t2 for update;
@ -354,6 +359,7 @@ key_len NULL
ref NULL
rows NULL
Extra
set optimizer_switch=@tmp_optimizer_switch;
# Lock the record.
select 1 from t1 natural join (select 3 as a, 2 as b union all
select 3 as a, 1 as b) as t2 for update;