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Merge branch '10.1' into 10.2

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Oleksandr Byelkin
2019-06-13 16:42:21 +02:00
parent e9145aab44 5b65d61d93
commit 50653e021f
36 changed files with 783 additions and 211 deletions
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33
mysql-test/r/join_nested.result
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@ -1966,3 +1966,36 @@ Note 1003 select 1 AS `K1`,'T1Row1' AS `Name`,`t2a`.`K2` AS `K2`,`t2a`.`K1r` AS
DROP VIEW v1;
DROP TABLE t1,t2;
set optimizer_search_depth= @tmp_mdev621;
#
# MDEV-19588: Nested left joins using optimized join cache
#
set optimizer_switch='optimize_join_buffer_size=on';
set @save_join_cache_level= @@join_cache_level;
set join_cache_level=2;
CREATE TABLE t1 (i1 int, c1 varchar(20), pk int) engine=myisam;
CREATE TABLE t2 (pk int, c1 varchar(20), i1 int) engine=myisam;
INSERT INTO t2 VALUES (7,'a',-912),(8,'a',5);
CREATE TABLE t3 (pk int, c1 varchar(20), i1 int) engine=myisam;
INSERT INTO t3 VALUES
(1,'a',-145),(2,'a',6),(3,'a',1),(7,'a',NULL),(8,'a',889),(9,'a',146),
(10,'a',177),(16,'a',-433),(17,'a',NULL),(18,'a',2),(19,'a',3),(20,'a',5),
(21,'a',-484),(22,'a',369),(23,'a',-192),(24,'a',-163),(25,'a',5),(26,'a',NULL);
SELECT t3.*
FROM t3 LEFT JOIN t1 LEFT JOIN t2 ON t1.i1 = t2.i1 ON t3.i1 = t1.i1
WHERE t2.pk < 13 OR t3.i1 IS NULL;
pk c1 i1
7 a NULL
17 a NULL
26 a NULL
explain extended SELECT t3.*
FROM t3 LEFT JOIN t1 LEFT JOIN t2 ON t1.i1 = t2.i1 ON t3.i1 = t1.i1
WHERE t2.pk < 13 OR t3.i1 IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 18 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 0 0.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings:
Note 1003 select `test`.`t3`.`pk` AS `pk`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`i1` AS `i1` from `test`.`t3` left join (`test`.`t1` left join `test`.`t2` on(`test`.`t2`.`i1` = `test`.`t3`.`i1`)) on(`test`.`t1`.`i1` = `test`.`t3`.`i1`) where `test`.`t2`.`pk` < 13 or `test`.`t3`.`i1` is null
DROP TABLE t1,t2,t3;
set join_cache_level= @save_join_cache_level;
set optimizer_switch=@save_optimizer_switch;