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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
commit 17b4e4a194
49 changed files with 208 additions and 21 deletions
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3
mysql-test/r/ps.result
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@ -151,6 +151,8 @@ c32 set('monday', 'tuesday', 'wednesday')
create table t2 like t1;
set @save_optimizer_switch=@@optimizer_switch;
set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=off";
set @tmp_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=off,derived_with_keys=off';
set @stmt= ' explain SELECT (SELECT SUM(c1 + c12 + 0.0) FROM t2 where (t1.c2 - 0e-3) = t2.c2 GROUP BY t1.c15 LIMIT 1) as scalar_s, exists (select 1.0e+0 from t2 where t2.c3 * 9.0000000000 = t1.c4) as exists_s, c5 * 4 in (select c6 + 0.3e+1 from t2) as in_s, (c7 - 4, c8 - 4) in (select c9 + 4.0, c10 + 40e-1 from t2) as in_row_s FROM t1, (select c25 x, c32 y from t2) tt WHERE x * 1 = c25 ' ;
prepare stmt1 from @stmt ;
execute stmt1 ;
@ -178,6 +180,7 @@ id select_type table type possible_keys key key_len ref rows Extra
3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
deallocate prepare stmt1;
set optimizer_switch=@tmp_optimizer_switch;
drop tables t1,t2;
set @@optimizer_switch=@save_optimizer_switch;
set @arg00=1;