diff options
Diffstat (limited to 'mysql-test/r/join_nested.result')
| -rw-r--r-- | mysql-test/r/join_nested.result | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/mysql-test/r/join_nested.result b/mysql-test/r/join_nested.result index 84b6ff640e9..6ddd39cbfec 100644 --- a/mysql-test/r/join_nested.result +++ b/mysql-test/r/join_nested.result @@ -1870,4 +1870,99 @@ f4 NULL NULL DROP TABLE t1,t2,t3,t4,t5; +# +# MDEV-7992: Nested left joins + 'not exists' optimization +# +CREATE TABLE t1( +K1 INT PRIMARY KEY, +Name VARCHAR(15) +); +INSERT INTO t1 VALUES +(1,'T1Row1'), (2,'T1Row2'); +CREATE TABLE t2( +K2 INT PRIMARY KEY, +K1r INT, +rowTimestamp DATETIME, +Event VARCHAR(15) +); +INSERT INTO t2 VALUES +(1, 1, '2015-04-13 10:42:11' ,'T1Row1Event1'), +(2, 1, '2015-04-13 10:42:12' ,'T1Row1Event2'), +(3, 1, '2015-04-13 10:42:12' ,'T1Row1Event3'); +SELECT t1a.*, t2a.*, +t2i.K2 AS K2B, t2i.K1r AS K1rB, +t2i.rowTimestamp AS rowTimestampB, t2i.Event AS EventB +FROM +t1 t1a JOIN t2 t2a ON t2a.K1r = t1a.K1 +LEFT JOIN +( t1 t1i LEFT JOIN t2 t2i ON t2i.K1r = t1i.K1) +ON (t1i.K1 = 1) AND +(((t2i.K1r = t1a.K1 AND t2i.rowTimestamp > t2a.rowTimestamp ) OR +(t2i.rowTimestamp = t2a.rowTimestamp AND t2i.K2 > t2a.K2)) +OR (t2i.K2 IS NULL)) +WHERE +t2a.K1r = 1 AND t2i.K2 IS NULL; +K1 Name K2 K1r rowTimestamp Event K2B K1rB rowTimestampB EventB +1 T1Row1 3 1 2015-04-13 10:42:12 T1Row1Event3 NULL NULL NULL NULL +EXPLAIN EXTENDED SELECT t1a.*, t2a.*, +t2i.K2 AS K2B, t2i.K1r AS K1rB, +t2i.rowTimestamp AS rowTimestampB, t2i.Event AS EventB +FROM +t1 t1a JOIN t2 t2a ON t2a.K1r = t1a.K1 +LEFT JOIN +( t1 t1i LEFT JOIN t2 t2i ON t2i.K1r = t1i.K1) +ON (t1i.K1 = 1) AND +(((t2i.K1r = t1a.K1 AND t2i.rowTimestamp > t2a.rowTimestamp ) OR +(t2i.rowTimestamp = t2a.rowTimestamp AND t2i.K2 > t2a.K2)) +OR (t2i.K2 IS NULL)) +WHERE +t2a.K1r = 1 AND t2i.K2 IS NULL; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1a const PRIMARY PRIMARY 4 const 1 100.00 +1 SIMPLE t2a ALL NULL NULL NULL NULL 3 100.00 Using where +1 SIMPLE t1i const PRIMARY PRIMARY 4 const 1 100.00 Using index +1 SIMPLE t2i ALL NULL NULL NULL NULL 3 100.00 Using where; Not exists +Warnings: +Note 1003 select 1 AS `K1`,'T1Row1' AS `Name`,`test`.`t2a`.`K2` AS `K2`,`test`.`t2a`.`K1r` AS `K1r`,`test`.`t2a`.`rowTimestamp` AS `rowTimestamp`,`test`.`t2a`.`Event` AS `Event`,`test`.`t2i`.`K2` AS `K2B`,`test`.`t2i`.`K1r` AS `K1rB`,`test`.`t2i`.`rowTimestamp` AS `rowTimestampB`,`test`.`t2i`.`Event` AS `EventB` from `test`.`t1` `t1a` join `test`.`t2` `t2a` left join (`test`.`t1` `t1i` left join `test`.`t2` `t2i` on((`test`.`t2i`.`K1r` = 1))) on(((`test`.`t1i`.`K1` = 1) and (((`test`.`t2i`.`K1r` = 1) and (`test`.`t2i`.`rowTimestamp` > `test`.`t2a`.`rowTimestamp`)) or ((`test`.`t2i`.`rowTimestamp` = `test`.`t2a`.`rowTimestamp`) and (`test`.`t2i`.`K2` > `test`.`t2a`.`K2`)) or isnull(`test`.`t2i`.`K2`)))) where ((`test`.`t2a`.`K1r` = 1) and isnull(`test`.`t2i`.`K2`)) +CREATE VIEW v1 AS +SELECT t2i.* +FROM t1 as t1i LEFT JOIN t2 as t2i ON t2i.K1r = t1i.K1 +WHERE t1i.K1 = 1 ; +SELECT +t1a.*, t2a.*, t2b.K2 as K2B, t2b.K1r as K1rB, +t2b.rowTimestamp as rowTimestampB, t2b.Event as EventB +FROM +t1 as t1a JOIN t2 as t2a ON t2a.K1r = t1a.K1 +LEFT JOIN +v1 as t2b +ON ((t2b.K1r = t1a.K1 AND t2b.rowTimestamp > t2a.rowTimestamp) OR +(t2b.rowTimestamp = t2a.rowTimestamp AND t2b.K2 > t2a.K2)) +OR (t2b.K2 IS NULL) +WHERE +t1a.K1 = 1 AND +t2b.K2 IS NULL; +K1 Name K2 K1r rowTimestamp Event K2B K1rB rowTimestampB EventB +1 T1Row1 3 1 2015-04-13 10:42:12 T1Row1Event3 NULL NULL NULL NULL +EXPLAIN EXTENDED SELECT +t1a.*, t2a.*, t2b.K2 as K2B, t2b.K1r as K1rB, +t2b.rowTimestamp as rowTimestampB, t2b.Event as EventB +FROM +t1 as t1a JOIN t2 as t2a ON t2a.K1r = t1a.K1 +LEFT JOIN +v1 as t2b +ON ((t2b.K1r = t1a.K1 AND t2b.rowTimestamp > t2a.rowTimestamp) OR +(t2b.rowTimestamp = t2a.rowTimestamp AND t2b.K2 > t2a.K2)) +OR (t2b.K2 IS NULL) +WHERE +t1a.K1 = 1 AND +t2b.K2 IS NULL; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1a const PRIMARY PRIMARY 4 const 1 100.00 +1 SIMPLE t2a ALL NULL NULL NULL NULL 3 100.00 Using where +1 SIMPLE t1i const PRIMARY PRIMARY 4 const 1 100.00 Using index +1 SIMPLE t2i ALL NULL NULL NULL NULL 3 100.00 Using where; Not exists +Warnings: +Note 1003 select 1 AS `K1`,'T1Row1' AS `Name`,`t2a`.`K2` AS `K2`,`t2a`.`K1r` AS `K1r`,`t2a`.`rowTimestamp` AS `rowTimestamp`,`t2a`.`Event` AS `Event`,`test`.`t2i`.`K2` AS `K2B`,`test`.`t2i`.`K1r` AS `K1rB`,`test`.`t2i`.`rowTimestamp` AS `rowTimestampB`,`test`.`t2i`.`Event` AS `EventB` from `test`.`t1` `t1a` join `test`.`t2` `t2a` left join (`test`.`t1` `t1i` left join `test`.`t2` `t2i` on((`test`.`t2i`.`K1r` = 1))) on(((`test`.`t1i`.`K1` = 1) and (((`test`.`t2i`.`K1r` = 1) and (`test`.`t2i`.`rowTimestamp` > `t2a`.`rowTimestamp`)) or ((`test`.`t2i`.`rowTimestamp` = `t2a`.`rowTimestamp`) and (`test`.`t2i`.`K2` > `t2a`.`K2`)) or isnull(`test`.`t2i`.`K2`)))) where ((`t2a`.`K1r` = 1) and isnull(`test`.`t2i`.`K2`)) +DROP VIEW v1; +DROP TABLE t1,t2; set optimizer_search_depth= @tmp_mdev621; |