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Merge 10.3 into 10.4

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Marko Mäkelä
2019-11-06 13:44:56 +02:00
parent d9899ce671 908ca4668d
commit 928abd6967
27 changed files with 429 additions and 123 deletions
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29
mysql-test/main/selectivity.test
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@ -1206,6 +1206,35 @@ set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivit
DROP TABLE t1;
--echo #
--echo # MDEV-20424: New default value for optimizer_use_condition-selectivity
--echo # leads to bad plan
--echo #
create table t1(a int, b int, c int, d int, key(a,b));
insert into t1 select 50,seq-1,seq-1,seq from seq_1_to_10;
insert into t1 select seq-1,seq-1,seq-1,seq from seq_1_to_100 limit 90;
create table t2(a int, b int, c int, primary key(a));
insert into t2 select seq-1,seq-1,seq-1 from seq_1_to_100;
create table t3(a int, b int, c int, primary key(a));
insert into t3 select seq-1,seq-1,seq-1 from seq_1_to_100 limit 30;
let $query= select t1.b,t2.a,t3.a,t3.b from t1,t2,t3
where t1.c = t2.a AND t1.d = t3.a and t1.a = 50 and t1.b <= 100;
set optimizer_use_condition_selectivity=1;
eval explain extended $query;
eval $query;
set optimizer_use_condition_selectivity=2;
eval explain extended $query;
eval $query;
set optimizer_use_condition_selectivity= @@optimizer_use_condition_selectivity;
drop table t1,t2,t3;
--echo # End of 10.1 tests
#