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Merge 10.3 into 10.4, except for MDEV-20265

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The MDEV-20265 commit e746f451d5
introduces DBUG_ASSERT(right_op == r_tbl) in
st_select_lex::add_cross_joined_table(), and that assertion would
fail in several tests that exercise joins. That commit was skipped
in this merge, and a separate fix of MDEV-20265 will be necessary in 10.4.
This commit is contained in:
Marko Mäkelä
2019-08-23 08:06:17 +03:00
parent 235cf969d2 b96e4424fb
commit efb8485d85
66 changed files with 689 additions and 317 deletions
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24
mysql-test/main/selectivity.test
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@ -1,4 +1,5 @@
--source include/have_stat_tables.inc
--source include/have_sequence.inc
--disable_warnings
drop table if exists t0,t1,t2,t3;
@ -1104,3 +1105,26 @@ set @@optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectiv
drop table t1;
drop function f1;
--echo #
--echo # MDEV-19834 Selectivity of an equality condition discounted twice
--echo #
set @@optimizer_use_condition_selectivity=4;
set @@use_stat_tables='preferably';
create table t1 (a int, b int, key (b), key (a));
insert into t1
select (rand(1)*1000)/10, (rand(1001)*1000)/50 from seq_1_to_1000;
analyze table t1 ;
--echo # Check what info the optimizer has about selectivities
explain extended select * from t1 use index () where a in (17,51,5);
explain extended select * from t1 use index () where b=2;
--echo # Now, the equality is used for ref access, while the range condition
--echo # gives selectivity data
explain extended select * from t1 where a in (17,51,5) and b=2;
drop table t1;
set use_stat_tables= @save_use_stat_tables;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
--echo # End of 10.1 tests