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MDEV-15253: Default optimizer setting changes for MariaDB 10.4

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use_stat_tables= PREFERABLY
optimizer_use_condition_selectivity= 4
This commit is contained in:
Varun Gupta
2018-05-31 15:51:59 +05:30
committed by Varun Gupta
parent a25ce5ab4b
commit 93c360e3a5
248 changed files with 3685 additions and 1747 deletions
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9
mysql-test/main/select_safe.result
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@ -62,19 +62,20 @@ a b
5 a
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
insert into t1 values (null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a");
insert into t1 values (null,"b"),(null,"b"),(null,"c"),(null,"c"),(null,"d"),(null,"d"),(null,"e"),(null,"e"),(null,"a"),(null,"e");
insert into t1 values (null,"x"),(null,"x"),(null,"y"),(null,"y"),(null,"z"),(null,"z"),(null,"v"),(null,"v"),(null,"a"),(null,"v");
explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL b NULL NULL NULL 41 Using where
1 SIMPLE t2 ref b b 21 test.t1.b 6
1 SIMPLE t1 ALL b NULL NULL NULL 11
1 SIMPLE t2 ALL b NULL NULL NULL 11 Using where; Using join buffer (flat, BNL join)
set MAX_SEEKS_FOR_KEY=1;
explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL b NULL NULL NULL 41 Using where
1 SIMPLE t2 ref b b 21 test.t1.b 6
1 SIMPLE t1 ALL b NULL NULL NULL 11
1 SIMPLE t2 ALL b NULL NULL NULL 11 Using where; Using join buffer (flat, BNL join)
SET MAX_SEEKS_FOR_KEY=DEFAULT;
drop table t1;
create table t1 (a int);