diff options
Diffstat (limited to 'mysql-test/main/join_nested_jcl6.result')
| -rw-r--r-- | mysql-test/main/join_nested_jcl6.result | 2091 |
1 files changed, 2091 insertions, 0 deletions
diff --git a/mysql-test/main/join_nested_jcl6.result b/mysql-test/main/join_nested_jcl6.result new file mode 100644 index 00000000000..eb59531b7d2 --- /dev/null +++ b/mysql-test/main/join_nested_jcl6.result @@ -0,0 +1,2091 @@ +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='optimize_join_buffer_size=on'; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; +set @@optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on'; +set join_cache_level=6; +show variables like 'join_cache_level'; +Variable_name Value +join_cache_level 6 +set @optimizer_switch_for_join_nested_test=@@optimizer_switch; +set @join_cache_level_for_join_nested_test=@@join_cache_level; +DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5,t6,t7,t8,t9; +SET @save_optimizer_switch=@@optimizer_switch; +SET optimizer_switch=ifnull(@optimizer_switch_for_join_nested_test,'outer_join_with_cache=off'); +set join_cache_level=@join_cache_level_for_join_nested_test; +CREATE TABLE t0 (a int, b int, c int); +CREATE TABLE t1 (a int, b int, c int); +CREATE TABLE t2 (a int, b int, c int); +CREATE TABLE t3 (a int, b int, c int); +CREATE TABLE t4 (a int, b int, c int); +CREATE TABLE t5 (a int, b int, c int); +CREATE TABLE t6 (a int, b int, c int); +CREATE TABLE t7 (a int, b int, c int); +CREATE TABLE t8 (a int, b int, c int); +CREATE TABLE t9 (a int, b int, c int); +INSERT INTO t0 VALUES (1,1,0), (1,2,0), (2,2,0); +INSERT INTO t1 VALUES (1,3,0), (2,2,0), (3,2,0); +INSERT INTO t2 VALUES (3,3,0), (4,2,0), (5,3,0); +INSERT INTO t3 VALUES (1,2,0), (2,2,0); +INSERT INTO t4 VALUES (3,2,0), (4,2,0); +INSERT INTO t5 VALUES (3,1,0), (2,2,0), (3,3,0); +INSERT INTO t6 VALUES (3,2,0), (6,2,0), (6,1,0); +INSERT INTO t7 VALUES (1,1,0), (2,2,0); +INSERT INTO t8 VALUES (0,2,0), (1,2,0); +INSERT INTO t9 VALUES (1,1,0), (1,2,0), (3,3,0); +SELECT t2.a,t2.b +FROM t2; +a b +3 3 +4 2 +5 3 +SELECT t3.a,t3.b +FROM t3; +a b +1 2 +2 2 +SELECT t4.a,t4.b +FROM t4; +a b +3 2 +4 2 +SELECT t3.a,t3.b,t4.a,t4.b +FROM t3,t4; +a b a b +1 2 3 2 +2 2 3 2 +1 2 4 2 +2 2 4 2 +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t2.b=t4.b; +a b a b a b +4 2 1 2 3 2 +4 2 2 2 3 2 +4 2 1 2 4 2 +4 2 2 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b; +a b a b a b +4 2 1 2 3 2 +4 2 1 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +EXPLAIN EXTENDED +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t2.b=t4.b +WHERE t3.a=1 OR t3.c IS NULL; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +Warnings: +Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) where `test`.`t3`.`a` = 1 or `test`.`t3`.`c` is null +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t2.b=t4.b +WHERE t3.a=1 OR t3.c IS NULL; +a b a b a b +4 2 1 2 3 2 +4 2 1 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t2.b=t4.b +WHERE t3.a>1 OR t3.c IS NULL; +a b a b a b +4 2 2 2 3 2 +4 2 2 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +SELECT t5.a,t5.b +FROM t5; +a b +3 1 +2 2 +3 3 +SELECT t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t3,t4,t5; +a b a b a b +1 2 3 2 3 1 +2 2 3 2 3 1 +1 2 4 2 3 1 +2 2 4 2 3 1 +1 2 3 2 2 2 +2 2 3 2 2 2 +1 2 4 2 2 2 +2 2 4 2 2 2 +1 2 3 2 3 3 +2 2 3 2 3 3 +1 2 4 2 3 3 +2 2 4 2 3 3 +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t2 +LEFT JOIN +(t3, t4, t5) +ON t2.b=t4.b; +a b a b a b a b +4 2 1 2 3 2 3 1 +4 2 2 2 3 2 3 1 +4 2 1 2 4 2 3 1 +4 2 2 2 4 2 3 1 +4 2 1 2 3 2 2 2 +4 2 2 2 3 2 2 2 +4 2 1 2 4 2 2 2 +4 2 2 2 4 2 2 2 +4 2 1 2 3 2 3 3 +4 2 2 2 3 2 3 3 +4 2 1 2 4 2 3 3 +4 2 2 2 4 2 3 3 +3 3 NULL NULL NULL NULL NULL NULL +5 3 NULL NULL NULL NULL NULL NULL +EXPLAIN EXTENDED +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t2 +LEFT JOIN +(t3, t4, t5) +ON t2.b=t4.b +WHERE t3.a>1 OR t3.c IS NULL; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join) +Warnings: +Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on(`test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) where `test`.`t3`.`a` > 1 or `test`.`t3`.`c` is null +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t2 +LEFT JOIN +(t3, t4, t5) +ON t2.b=t4.b +WHERE t3.a>1 OR t3.c IS NULL; +a b a b a b a b +4 2 2 2 3 2 3 1 +4 2 2 2 4 2 3 1 +4 2 2 2 3 2 2 2 +4 2 2 2 4 2 2 2 +4 2 2 2 3 2 3 3 +4 2 2 2 4 2 3 3 +3 3 NULL NULL NULL NULL NULL NULL +5 3 NULL NULL NULL NULL NULL NULL +EXPLAIN EXTENDED +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t2 +LEFT JOIN +(t3, t4, t5) +ON t2.b=t4.b +WHERE (t3.a>1 OR t3.c IS NULL) AND +(t5.a<3 OR t5.c IS NULL); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +Warnings: +Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on(`test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) where (`test`.`t3`.`a` > 1 or `test`.`t3`.`c` is null) and (`test`.`t5`.`a` < 3 or `test`.`t5`.`c` is null) +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b +FROM t2 +LEFT JOIN +(t3, t4, t5) +ON t2.b=t4.b +WHERE (t3.a>1 OR t3.c IS NULL) AND +(t5.a<3 OR t5.c IS NULL); +a b a b a b a b +4 2 2 2 3 2 2 2 +4 2 2 2 4 2 2 2 +3 3 NULL NULL NULL NULL NULL NULL +5 3 NULL NULL NULL NULL NULL NULL +SELECT t6.a,t6.b +FROM t6; +a b +3 2 +6 2 +6 1 +SELECT t7.a,t7.b +FROM t7; +a b +1 1 +2 2 +SELECT t6.a,t6.b,t7.a,t7.b +FROM t6,t7; +a b a b +3 2 1 1 +3 2 2 2 +6 2 1 1 +6 2 2 2 +6 1 1 1 +6 1 2 2 +SELECT t8.a,t8.b +FROM t8; +a b +0 2 +1 2 +EXPLAIN EXTENDED +SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM (t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) +1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t7.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +Warnings: +Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t7`.`b` and `test`.`t6`.`b` < 10 and `test`.`t7`.`b` is not null) where 1 +SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM (t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10; +a b a b a b +3 2 2 2 0 2 +6 2 2 2 0 2 +6 1 2 2 0 2 +3 2 2 2 1 2 +6 2 2 2 1 2 +6 1 2 2 1 2 +3 2 1 1 NULL NULL +6 2 1 1 NULL NULL +6 1 1 1 NULL NULL +SELECT t5.a,t5.b +FROM t5; +a b +3 1 +2 2 +3 3 +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b; +a b a b a b a b +2 2 3 2 2 2 0 2 +2 2 6 2 2 2 0 2 +2 2 3 2 2 2 1 2 +2 2 6 2 2 2 1 2 +3 1 3 2 1 1 NULL NULL +3 1 6 2 1 1 NULL NULL +3 3 NULL NULL NULL NULL NULL NULL +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b AND +(t8.a < 1 OR t8.c IS NULL); +a b a b a b a b +2 2 3 2 2 2 0 2 +2 2 6 2 2 2 0 2 +3 1 3 2 1 1 NULL NULL +3 1 6 2 1 1 NULL NULL +3 3 NULL NULL NULL NULL NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b; +a b a b a b +4 2 1 2 3 2 +4 2 1 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b; +a b a b a b a b a b a b a b +4 2 1 2 3 2 2 2 3 2 2 2 0 2 +4 2 1 2 4 2 2 2 3 2 2 2 0 2 +4 2 1 2 3 2 2 2 6 2 2 2 0 2 +4 2 1 2 4 2 2 2 6 2 2 2 0 2 +4 2 1 2 3 2 2 2 3 2 2 2 1 2 +4 2 1 2 4 2 2 2 3 2 2 2 1 2 +4 2 1 2 3 2 2 2 6 2 2 2 1 2 +4 2 1 2 4 2 2 2 6 2 2 2 1 2 +4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +WHERE t2.a > 3 AND +(t6.a < 6 OR t6.c IS NULL); +a b a b a b a b a b a b a b +4 2 1 2 3 2 2 2 3 2 2 2 0 2 +4 2 1 2 4 2 2 2 3 2 2 2 0 2 +4 2 1 2 3 2 2 2 3 2 2 2 1 2 +4 2 1 2 4 2 2 2 3 2 2 2 1 2 +4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +SELECT t1.a,t1.b +FROM t1; +a b +1 3 +2 2 +3 2 +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2); +a b a b a b a b a b a b a b a b +3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2 +3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2 +3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 +3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 +3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2 +3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2 +3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2 +3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2 +1 3 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +1 3 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +3 2 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +3 2 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +3 2 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +3 2 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +1 3 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +3 2 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +1 3 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +1 3 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +3 2 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +1 3 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +1 3 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +3 2 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +1 3 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2) +WHERE (t2.a >= 4 OR t2.c IS NULL); +a b a b a b a b a b a b a b a b +3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2 +3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2 +3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 +3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 +3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2 +3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2 +3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2 +3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2 +1 3 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +1 3 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +1 3 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +1 3 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +1 3 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL +SELECT t0.a,t0.b +FROM t0; +a b +1 1 +1 2 +2 2 +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2) +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where +1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join) +1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +Warnings: +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2) +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL); +a b a b a b a b a b a b a b a b a b +1 2 3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2 +1 2 3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2 +1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 +1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 +1 2 3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2 +1 2 3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2 +1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2 +1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2 +1 2 3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL +1 2 3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL +1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL +1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL +1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL +1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2 +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL +1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL +1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) AND +(t9.a=1); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where +1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +Warnings: +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t9`.`b` = `test`.`t8`.`b` or `test`.`t8`.`c` is null) +SELECT t9.a,t9.b +FROM t9; +a b +1 1 +1 2 +3 3 +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) AND +(t9.a=1); +a b a b a b a b a b a b a b a b a b a b +1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1 +1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2 +SELECT t1.a,t1.b +FROM t1; +a b +1 3 +2 2 +3 2 +SELECT t2.a,t2.b +FROM t2; +a b +3 3 +4 2 +5 3 +SELECT t3.a,t3.b +FROM t3; +a b +1 2 +2 2 +SELECT t2.a,t2.b,t3.a,t3.b +FROM t2 +LEFT JOIN +t3 +ON t2.b=t3.b; +a b a b +4 2 1 2 +4 2 2 2 +3 3 NULL NULL +5 3 NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b +FROM t1, t2 +LEFT JOIN +t3 +ON t2.b=t3.b +WHERE t1.a <= 2; +a b a b a b +1 3 4 2 1 2 +2 2 4 2 1 2 +1 3 4 2 2 2 +2 2 4 2 2 2 +1 3 3 3 NULL NULL +2 2 3 3 NULL NULL +1 3 5 3 NULL NULL +2 2 5 3 NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b +FROM t1, t3 +RIGHT JOIN +t2 +ON t2.b=t3.b +WHERE t1.a <= 2; +a b a b a b +1 3 4 2 1 2 +2 2 4 2 1 2 +1 3 4 2 2 2 +2 2 4 2 2 2 +1 3 3 3 NULL NULL +2 2 3 3 NULL NULL +1 3 5 3 NULL NULL +2 2 5 3 NULL NULL +SELECT t3.a,t3.b,t4.a,t4.b +FROM t3,t4; +a b a b +1 2 3 2 +2 2 3 2 +1 2 4 2 +2 2 4 2 +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b; +a b a b a b +4 2 1 2 3 2 +4 2 1 2 4 2 +3 3 NULL NULL NULL NULL +5 3 NULL NULL NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t1, t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b +WHERE t1.a <= 2; +a b a b a b a b +1 3 4 2 1 2 3 2 +2 2 4 2 1 2 3 2 +1 3 4 2 1 2 4 2 +2 2 4 2 1 2 4 2 +1 3 3 3 NULL NULL NULL NULL +2 2 3 3 NULL NULL NULL NULL +1 3 5 3 NULL NULL NULL NULL +2 2 5 3 NULL NULL NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t1, (t3, t4) +RIGHT JOIN +t2 +ON t3.a=1 AND t2.b=t4.b +WHERE t1.a <= 2; +a b a b a b a b +1 3 4 2 1 2 3 2 +2 2 4 2 1 2 3 2 +1 3 4 2 1 2 4 2 +2 2 4 2 1 2 4 2 +1 3 3 3 NULL NULL NULL NULL +2 2 3 3 NULL NULL NULL NULL +1 3 5 3 NULL NULL NULL NULL +2 2 5 3 NULL NULL NULL NULL +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t1, (t3, t4) +RIGHT JOIN +t2 +ON t3.a=1 AND t2.b=t4.b +WHERE t1.a <= 2; +a b a b a b a b +1 3 4 2 1 2 3 2 +2 2 4 2 1 2 3 2 +1 3 4 2 1 2 4 2 +2 2 4 2 1 2 4 2 +1 3 3 3 NULL NULL NULL NULL +2 2 3 3 NULL NULL NULL NULL +1 3 5 3 NULL NULL NULL NULL +2 2 5 3 NULL NULL NULL NULL +EXPLAIN EXTENDED +SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM t1, (t3, t4) +RIGHT JOIN +t2 +ON t3.a=1 AND t2.b=t4.b +WHERE t1.a <= 2; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +Warnings: +Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) where `test`.`t1`.`a` <= 2 +INSERT INTO t2 VALUES (-1,9,0), (-3,10,0), (-2,8,0), (-4,11,0), (-5,15,0); +CREATE INDEX idx_b ON t2(b); +EXPLAIN EXTENDED +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM (t3,t4) +LEFT JOIN +(t1,t2) +ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b AND t2.a>0; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) +1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join) +Warnings: +Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t3`.`b` and `test`.`t2`.`b` = `test`.`t3`.`b` and `test`.`t2`.`a` > 0 and `test`.`t3`.`b` is not null) where 1 +SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b +FROM (t3,t4) +LEFT JOIN +(t1,t2) +ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b AND t2.a>0; +a b a b a b +4 2 1 2 3 2 +4 2 1 2 4 2 +4 2 1 2 3 2 +4 2 1 2 4 2 +4 2 1 2 3 2 +4 2 1 2 4 2 +NULL NULL 2 2 3 2 +NULL NULL 2 2 4 2 +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b AND t2.a>0, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) AND +(t9.a=1); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where +1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +Warnings: +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t3`.`b` = `test`.`t4`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t9`.`b` = `test`.`t8`.`b` or `test`.`t8`.`c` is null) +INSERT INTO t4 VALUES (-3,12,0), (-4,13,0), (-1,11,0), (-3,11,0), (-5,15,0); +INSERT INTO t5 VALUES (-3,11,0), (-2,12,0), (-3,13,0), (-4,12,0); +CREATE INDEX idx_b ON t4(b); +CREATE INDEX idx_b ON t5(b); +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b AND t2.a>0 AND t4.a>0, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b AND t5.a>0 +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) AND +(t9.a=1); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where +1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +Warnings: +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null) +INSERT INTO t8 VALUES (-3,12,0), (-1,14,0), (-5,15,0), (-1,11,0), (-4,13,0); +CREATE INDEX idx_b ON t8(b); +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b AND t2.a>0 AND t4.a>0, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 AND t8.a>=0 +) +ON t6.b >= 2 AND t5.b=t7.b AND t5.a>0 +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2), +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) AND +(t9.a=1); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where +1 SIMPLE t1 hash_ALL NULL #hash#$hj 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +Warnings: +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t8`.`a` >= 0 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null) +INSERT INTO t1 VALUES (-1,133,0), (-2,12,0), (-3,11,0), (-5,15,0); +CREATE INDEX idx_b ON t1(b); +CREATE INDEX idx_a ON t0(a); +EXPLAIN EXTENDED +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2) AND t1.a>0, +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) AND +(t9.a=1); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t0 ref idx_a idx_a 5 const 1 100.00 Using where +1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 2 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +Warnings: +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2 and `test`.`t1`.`a` > 0) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null) +SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, +t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b +FROM t0,t1 +LEFT JOIN +( +t2 +LEFT JOIN +(t3, t4) +ON t3.a=1 AND t2.b=t4.b, +t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b +) +ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND +(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND +(t1.a != 2) AND t1.a>0, +t9 +WHERE t0.a=1 AND +t0.b=t1.b AND +(t2.a >= 4 OR t2.c IS NULL) AND +(t3.a < 5 OR t3.c IS NULL) AND +(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND +(t5.a >=2 OR t5.c IS NULL) AND +(t6.a >=4 OR t6.c IS NULL) AND +(t7.a <= 2 OR t7.c IS NULL) AND +(t8.a < 1 OR t8.c IS NULL) AND +(t8.b=t9.b OR t8.c IS NULL) AND +(t9.a=1); +a b a b a b a b a b a b a b a b a b a b +1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 1 +1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 2 +1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 1 +1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 2 +1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1 +1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2 +SELECT t2.a,t2.b +FROM t2; +a b +3 3 +4 2 +5 3 +-1 9 +-3 10 +-2 8 +-4 11 +-5 15 +SELECT t3.a,t3.b +FROM t3; +a b +1 2 +2 2 +SELECT t2.a,t2.b,t3.a,t3.b +FROM t2 LEFT JOIN t3 ON t2.b=t3.b +WHERE t2.a = 4 OR (t2.a > 4 AND t3.a IS NULL); +a b a b +4 2 1 2 +4 2 2 2 +5 3 NULL NULL +SELECT t2.a,t2.b,t3.a,t3.b +FROM t2 LEFT JOIN (t3) ON t2.b=t3.b +WHERE t2.a = 4 OR (t2.a > 4 AND t3.a IS NULL); +a b a b +4 2 1 2 +4 2 2 2 +5 3 NULL NULL +ALTER TABLE t3 +CHANGE COLUMN a a1 int, +CHANGE COLUMN c c1 int; +SELECT t2.a,t2.b,t3.a1,t3.b +FROM t2 LEFT JOIN t3 ON t2.b=t3.b +WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL); +a b a1 b +4 2 1 2 +4 2 2 2 +5 3 NULL NULL +SELECT t2.a,t2.b,t3.a1,t3.b +FROM t2 NATURAL LEFT JOIN t3 +WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL); +a b a1 b +4 2 1 2 +4 2 2 2 +5 3 NULL NULL +DROP TABLE t0,t1,t2,t3,t4,t5,t6,t7,t8,t9; +CREATE TABLE t1 (a int); +CREATE TABLE t2 (a int); +CREATE TABLE t3 (a int); +INSERT INTO t1 VALUES (1); +INSERT INTO t2 VALUES (2); +INSERT INTO t3 VALUES (2); +INSERT INTO t1 VALUES (2); +SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t2.a=t3.a) ON t1.a=t3.a; +a a a +2 2 2 +1 NULL NULL +SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a; +a a a +2 2 2 +1 NULL NULL +DELETE FROM t1 WHERE a=2; +SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a; +a a a +1 NULL NULL +DELETE FROM t2; +SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a; +a a a +1 NULL NULL +DROP TABLE t1,t2,t3; +CREATE TABLE t1(a int, key (a)); +CREATE TABLE t2(b int, key (b)); +CREATE TABLE t3(c int, key (c)); +INSERT INTO t1 VALUES (NULL), (0), (1), (2), (3), (4), (5), (6), (7), (8), (9), +(10), (11), (12), (13), (14), (15), (16), (17), (18), (19); +INSERT INTO t2 VALUES (NULL), (0), (1), (2), (3), (4), (5), (6), (7), (8), (9), +(10), (11), (12), (13), (14), (15), (16), (17), (18), (19); +INSERT INTO t3 VALUES (0), (1), (2), (3), (4), (5); +EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON c < 3 and b = c; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index NULL a 5 NULL 21 Using index +1 SIMPLE t3 index c c 5 NULL 6 Using where; Using index +1 SIMPLE t2 ref b b 5 test.t3.c 2 Using index +EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index NULL a 5 NULL 21 Using index +1 SIMPLE t3 index c c 5 NULL 6 Using where; Using index +1 SIMPLE t2 ref b b 5 test.t3.c 2 Using index +SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; +a b c +NULL 0 0 +NULL 1 1 +NULL 2 2 +0 0 0 +0 1 1 +0 2 2 +1 0 0 +1 1 1 +1 2 2 +2 0 0 +2 1 1 +2 2 2 +3 0 0 +3 1 1 +3 2 2 +4 0 0 +4 1 1 +4 2 2 +5 0 0 +5 1 1 +5 2 2 +6 0 0 +6 1 1 +6 2 2 +7 0 0 +7 1 1 +7 2 2 +8 0 0 +8 1 1 +8 2 2 +9 0 0 +9 1 1 +9 2 2 +10 0 0 +10 1 1 +10 2 2 +11 0 0 +11 1 1 +11 2 2 +12 0 0 +12 1 1 +12 2 2 +13 0 0 +13 1 1 +13 2 2 +14 0 0 +14 1 1 +14 2 2 +15 0 0 +15 1 1 +15 2 2 +16 0 0 +16 1 1 +16 2 2 +17 0 0 +17 1 1 +17 2 2 +18 0 0 +18 1 1 +18 2 2 +19 0 0 +19 1 1 +19 2 2 +DELETE FROM t3; +EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index NULL a 5 NULL 21 Using index +1 SIMPLE t3 index c c 5 NULL 0 Using where; Using index +1 SIMPLE t2 ref b b 5 test.t3.c 2 Using index +SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; +a b c +NULL NULL NULL +0 NULL NULL +1 NULL NULL +2 NULL NULL +3 NULL NULL +4 NULL NULL +5 NULL NULL +6 NULL NULL +7 NULL NULL +8 NULL NULL +9 NULL NULL +10 NULL NULL +11 NULL NULL +12 NULL NULL +13 NULL NULL +14 NULL NULL +15 NULL NULL +16 NULL NULL +17 NULL NULL +18 NULL NULL +19 NULL NULL +DROP TABLE t1,t2,t3; +CREATE TABLE t1 (c11 int); +CREATE TABLE t2 (c21 int); +CREATE TABLE t3 (c31 int); +INSERT INTO t1 VALUES (4), (5); +SELECT * FROM t1 LEFT JOIN t2 ON c11=c21; +c11 c21 +4 NULL +5 NULL +EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON c11=c21; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 system NULL NULL NULL NULL 0 Const row not found +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21; +c11 c21 c31 +4 NULL NULL +5 NULL NULL +EXPLAIN SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.c11 0 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join) +DROP TABLE t1,t2,t3; +CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL); +INSERT INTO t1 VALUES (23, 2340), (26, 9900); +CREATE TABLE t2 (goods int(12), name varchar(50), shop char(2)); +INSERT INTO t2 VALUES (23, 'as300', 'fr'), (26, 'as600', 'fr'); +create table t3 (groupid int(12) NOT NULL, goodsid int(12) NOT NULL); +INSERT INTO t3 VALUES (3,23), (6,26); +CREATE TABLE t4 (groupid int(12)); +INSERT INTO t4 VALUES (1), (2), (3), (4), (5), (6); +SELECT * FROM +(SELECT DISTINCT gl.groupid, gp.price +FROM t4 gl +LEFT JOIN +(t3 g INNER JOIN t2 p ON g.goodsid = p.goods +INNER JOIN t1 gp ON p.goods = gp.goods) +ON gl.groupid = g.groupid and p.shop = 'fr') t; +groupid price +3 2340 +6 9900 +1 NULL +2 NULL +4 NULL +5 NULL +CREATE VIEW v1 AS +SELECT g.groupid groupid, p.goods goods, +p.name name, p.shop shop, +gp.price price +FROM t3 g INNER JOIN t2 p ON g.goodsid = p.goods +INNER JOIN t1 gp on p.goods = gp.goods; +CREATE VIEW v2 AS +SELECT DISTINCT g.groupid, fr.price +FROM t4 g +LEFT JOIN +v1 fr on g.groupid = fr.groupid and fr.shop = 'fr'; +SELECT * FROM v2; +groupid price +3 2340 +6 9900 +1 NULL +2 NULL +4 NULL +5 NULL +SELECT * FROM +(SELECT DISTINCT g.groupid, fr.price +FROM t4 g +LEFT JOIN +v1 fr on g.groupid = fr.groupid and fr.shop = 'fr') t; +groupid price +3 2340 +6 9900 +1 NULL +2 NULL +4 NULL +5 NULL +DROP VIEW v1,v2; +DROP TABLE t1,t2,t3,t4; +CREATE TABLE t1(a int); +CREATE TABLE t2(b int); +CREATE TABLE t3(c int, d int); +CREATE TABLE t4(d int); +CREATE TABLE t5(e int, f int); +CREATE TABLE t6(f int); +CREATE VIEW v1 AS +SELECT e FROM t5 JOIN t6 ON t5.e=t6.f; +CREATE VIEW v2 AS +SELECT e FROM t5 NATURAL JOIN t6; +SELECT t1.a FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c JOIN t4 USING(d); +a +SELECT t1.x FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c JOIN t4 USING(d); +ERROR 42S22: Unknown column 't1.x' in 'field list' +SELECT t1.a FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c NATURAL JOIN t4; +a +SELECT t1.x FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c NATURAL JOIN t4; +ERROR 42S22: Unknown column 't1.x' in 'field list' +SELECT v1.e FROM v1 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d); +e +SELECT v1.x FROM v1 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d); +ERROR 42S22: Unknown column 'v1.x' in 'field list' +SELECT v2.e FROM v2 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d); +e +SELECT v2.x FROM v2 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d); +ERROR 42S22: Unknown column 'v2.x' in 'field list' +DROP VIEW v1, v2; +DROP TABLE t1, t2, t3, t4, t5, t6; +create table t1 (id1 int(11) not null); +insert into t1 values (1),(2); +create table t2 (id2 int(11) not null); +insert into t2 values (1),(2),(3),(4); +create table t3 (id3 char(16) not null); +insert into t3 values ('100'); +create table t4 (id2 int(11) not null, id3 char(16)); +create table t5 (id1 int(11) not null, key (id1)); +insert into t5 values (1),(2),(1); +create view v1 as +select t4.id3 from t4 join t2 on t4.id2 = t2.id2; +select t1.id1 from t1 inner join (t3 left join v1 on t3.id3 = v1.id3); +id1 +1 +2 +drop view v1; +drop table t1, t2, t3, t4, t5; +create table t0 (a int); +insert into t0 values (0),(1),(2),(3); +create table t1(a int); +insert into t1 select A.a + 10*(B.a) from t0 A, t0 B; +create table t2 (a int, b int); +insert into t2 values (1,1), (2,2), (3,3); +create table t3(a int, b int, filler char(200), key(a)); +insert into t3 select a,a,'filler' from t1; +insert into t3 select a,a,'filler' from t1; +create table t4 like t3; +insert into t4 select * from t3; +insert into t4 select * from t3; +create table t5 like t4; +insert into t5 select * from t4; +insert into t5 select * from t4; +create table t6 like t5; +insert into t6 select * from t5; +insert into t6 select * from t5; +create table t7 like t6; +insert into t7 select * from t6; +insert into t7 select * from t6; +explain select * from t4 join +t2 left join (t3 join t5 on t5.a=t3.b) on t3.a=t2.b where t4.a<=>t3.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL X +1 SIMPLE t3 ref a a 5 test.t2.b X Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t4 ref a a 5 test.t3.b X Using index condition(BKA); Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +explain select * from (t4 join t6 on t6.a=t4.b) right join t3 on t4.a=t3.b +join t2 left join (t5 join t7 on t7.a=t5.b) on t5.a=t2.b where t3.a<=>t2.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL X +1 SIMPLE t3 ref a a 5 test.t2.b X Using index condition(BKA); Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t4 ref a a 5 test.t3.b X Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t5 ref a a 5 test.t2.b X Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t7 ref a a 5 test.t5.b X Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +explain select * from t2 left join +(t3 left join (t4 join t6 on t6.a=t4.b) on t4.a=t3.b +join t5 on t5.a=t3.b) on t3.a=t2.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL X +1 SIMPLE t3 ref a a 5 test.t2.b X Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t4 ref a a 5 test.t5.a X Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +drop table t0, t1, t2, t3, t4, t5, t6, t7; +create table t1 (a int); +insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t2 (a int, filler char(100), key(a)); +insert into t2 select A.a + 10*B.a, '' from t1 A, t1 B; +create table t3 like t2; +insert into t3 select * from t2; +explain select * from t1 left join +(t2 left join t3 on (t2.a = t3.a)) +on (t1.a = t2.a); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 10 +1 SIMPLE t2 ref a a 5 test.t1.a 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +drop table t1, t2, t3; +CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, type varchar(10)); +CREATE TABLE t2 (pid int NOT NULL PRIMARY KEY, type varchar(10)); +CREATE TABLE t3 (cid int NOT NULL PRIMARY KEY, +id int NOT NULL, +pid int NOT NULL); +INSERT INTO t1 VALUES (1, 'A'), (3, 'C'); +INSERT INTO t2 VALUES (1, 'A'), (3, 'C'); +INSERT INTO t3 VALUES (1, 1, 1), (3, 3, 3); +SELECT * FROM t1 p LEFT JOIN (t3 JOIN t1) +ON (t1.id=t3.id AND t1.type='B' AND p.id=t3.id) +LEFT JOIN t2 ON (t3.pid=t2.pid) +WHERE p.id=1; +id type cid id pid id type pid type +1 A NULL NULL NULL NULL NULL NULL NULL +CREATE VIEW v1 AS +SELECT t3.* FROM t3 JOIN t1 ON t1.id=t3.id AND t1.type='B'; +SELECT * FROM t1 p LEFT JOIN v1 ON p.id=v1.id +LEFT JOIN t2 ON v1.pid=t2.pid +WHERE p.id=1; +id type cid id pid pid type +1 A NULL NULL NULL NULL NULL +DROP VIEW v1; +DROP TABLE t1,t2,t3; +CREATE TABLE t1 (id1 int PRIMARY KEY, id2 int); +CREATE TABLE t2 (id1 int PRIMARY KEY, id2 int); +CREATE TABLE t3 (id1 int PRIMARY KEY, id2 int); +CREATE TABLE t4 (id1 int PRIMARY KEY, id2 int); +CREATE TABLE t5 (id1 int PRIMARY KEY, id2 int); +SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa +FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1 +LEFT OUTER JOIN +(t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1) +ON t3.id2 IS NOT NULL +WHERE t1.id1=2; +id ngroupbynsa +PREPARE stmt FROM +"SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa + FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1 + LEFT OUTER JOIN + (t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1) + ON t3.id2 IS NOT NULL + WHERE t1.id1=2"; +EXECUTE stmt; +id ngroupbynsa +EXECUTE stmt; +id ngroupbynsa +EXECUTE stmt; +id ngroupbynsa +EXECUTE stmt; +id ngroupbynsa +INSERT INTO t1 VALUES (1,1), (2,1), (3,2); +INSERT INTO t2 VALUES (2,1), (3,2), (4,3); +INSERT INTO t3 VALUES (1,1), (3,2), (2,NULL); +INSERT INTO t4 VALUES (1,1), (2,1), (3,3); +INSERT INTO t5 VALUES (1,1), (2,2), (3,3), (4,3); +EXECUTE stmt; +id ngroupbynsa +2 1 +2 1 +EXECUTE stmt; +id ngroupbynsa +2 1 +2 1 +EXECUTE stmt; +id ngroupbynsa +2 1 +2 1 +EXECUTE stmt; +id ngroupbynsa +2 1 +2 1 +SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa +FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1 +LEFT OUTER JOIN +(t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1) +ON t3.id2 IS NOT NULL +WHERE t1.id1=2; +id ngroupbynsa +2 1 +2 1 +DROP TABLE t1,t2,t3,t4,t5; +CREATE TABLE t1 ( +id int NOT NULL PRIMARY KEY, +ct int DEFAULT NULL, +pc int DEFAULT NULL, +INDEX idx_ct (ct), +INDEX idx_pc (pc) +); +INSERT INTO t1 VALUES +(1,NULL,NULL),(2,NULL,NULL),(3,NULL,NULL),(4,NULL,NULL),(5,NULL,NULL); +CREATE TABLE t2 ( +id int NOT NULL PRIMARY KEY, +sr int NOT NULL, +nm varchar(255) NOT NULL, +INDEX idx_sr (sr) +); +INSERT INTO t2 VALUES +(2441905,4308,'LesAbymes'),(2441906,4308,'Anse-Bertrand'); +CREATE TABLE t3 ( +id int NOT NULL PRIMARY KEY, +ct int NOT NULL, +ln int NOT NULL, +INDEX idx_ct (ct), +INDEX idx_ln (ln) +); +CREATE TABLE t4 ( +id int NOT NULL PRIMARY KEY, +nm varchar(255) NOT NULL +); +INSERT INTO t4 VALUES (4308,'Guadeloupe'),(4309,'Martinique'); +SELECT t1.* +FROM t1 LEFT JOIN +(t2 LEFT JOIN t3 ON t3.ct=t2.id AND t3.ln='5') ON t1.ct=t2.id +WHERE t1.id='5'; +id ct pc +5 NULL NULL +SELECT t1.*, t4.nm +FROM t1 LEFT JOIN +(t2 LEFT JOIN t3 ON t3.ct=t2.id AND t3.ln='5') ON t1.ct=t2.id +LEFT JOIN t4 ON t2.sr=t4.id +WHERE t1.id='5'; +id ct pc nm +5 NULL NULL NULL +DROP TABLE t1,t2,t3,t4; +CREATE TABLE t1 (a INT, b INT); +CREATE TABLE t2 (a INT); +CREATE TABLE t3 (a INT, c INT); +CREATE TABLE t4 (a INT, c INT); +CREATE TABLE t5 (a INT, c INT); +SELECT b FROM t1 JOIN (t2 LEFT JOIN t3 USING (a) LEFT JOIN t4 USING (a) +LEFT JOIN t5 USING (a)) USING (a); +b +SELECT c FROM t1 JOIN (t2 LEFT JOIN t3 USING (a) LEFT JOIN t4 USING (a) +LEFT JOIN t5 USING (a)) USING (a); +ERROR 23000: Column 'c' in field list is ambiguous +SELECT b FROM t1 JOIN (t2 JOIN t3 USING (a) JOIN t4 USING (a) +JOIN t5 USING (a)) USING (a); +b +SELECT c FROM t1 JOIN (t2 JOIN t3 USING (a) JOIN t4 USING (a) +JOIN t5 USING (a)) USING (a); +ERROR 23000: Column 'c' in field list is ambiguous +DROP TABLE t1,t2,t3,t4,t5; +CREATE TABLE t1 (a INT, b INT); +CREATE TABLE t2 (a INT, b INT); +CREATE TABLE t3 (a INT, b INT); +INSERT INTO t1 VALUES (1,1); +INSERT INTO t2 VALUES (1,1); +INSERT INTO t3 VALUES (1,1); +SELECT * FROM t1 JOIN (t2 JOIN t3 USING (b)) USING (a); +ERROR 23000: Column 'a' in from clause is ambiguous +DROP TABLE t1,t2,t3; +CREATE TABLE t1 ( +carrier char(2) default NULL, +id int NOT NULL auto_increment PRIMARY KEY +); +INSERT INTO t1 VALUES +('CO',235371754),('CO',235376554),('CO',235376884),('CO',235377874), +('CO',231060394),('CO',231059224),('CO',231059314),('CO',231060484), +('CO',231060274),('CO',231060124),('CO',231060244),('CO',231058594), +('CO',231058924),('CO',231058504),('CO',231059344),('CO',231060424), +('CO',231059554),('CO',231060304),('CO',231059644),('CO',231059464), +('CO',231059764),('CO',231058294),('CO',231058624),('CO',231058864), +('CO',231059374),('CO',231059584),('CO',231059734),('CO',231059014), +('CO',231059854),('CO',231059494),('CO',231059794),('CO',231058534), +('CO',231058324),('CO',231058684),('CO',231059524),('CO',231059974); +CREATE TABLE t2 ( +scan_date date default NULL, +package_id int default NULL, +INDEX scan_date(scan_date), +INDEX package_id(package_id) +); +INSERT INTO t2 VALUES +('2008-12-29',231062944),('2008-12-29',231065764),('2008-12-29',231066124), +('2008-12-29',231060094),('2008-12-29',231061054),('2008-12-29',231065644), +('2008-12-29',231064384),('2008-12-29',231064444),('2008-12-29',231073774), +('2008-12-29',231058594),('2008-12-29',231059374),('2008-12-29',231066004), +('2008-12-29',231068494),('2008-12-29',231070174),('2008-12-29',231071884), +('2008-12-29',231063274),('2008-12-29',231063754),('2008-12-29',231064144), +('2008-12-29',231069424),('2008-12-29',231073714),('2008-12-29',231058414), +('2008-12-29',231060994),('2008-12-29',231069154),('2008-12-29',231068614), +('2008-12-29',231071464),('2008-12-29',231074014),('2008-12-29',231059614), +('2008-12-29',231059074),('2008-12-29',231059464),('2008-12-29',231069094), +('2008-12-29',231067294),('2008-12-29',231070144),('2008-12-29',231073804), +('2008-12-29',231072634),('2008-12-29',231058294),('2008-12-29',231065344), +('2008-12-29',231066094),('2008-12-29',231069034),('2008-12-29',231058594), +('2008-12-29',231059854),('2008-12-29',231059884),('2008-12-29',231059914), +('2008-12-29',231063664),('2008-12-29',231063814),('2008-12-29',231063904); +CREATE TABLE t3 ( +package_id int default NULL, +INDEX package_id(package_id) +); +INSERT INTO t3 VALUES +(231058294),(231058324),(231058354),(231058384),(231058414),(231058444), +(231058474),(231058504),(231058534),(231058564),(231058594),(231058624), +(231058684),(231058744),(231058804),(231058864),(231058924),(231058954), +(231059014),(231059074),(231059104),(231059134),(231059164),(231059194), +(231059224),(231059254),(231059284),(231059314),(231059344),(231059374), +(231059404),(231059434),(231059464),(231059494),(231059524),(231059554), +(231059584),(231059614),(231059644),(231059674),(231059704),(231059734), +(231059764),(231059794),(231059824),(231059854),(231059884),(231059914), +(231059944),(231059974),(231060004),(231060034),(231060064),(231060094), +(231060124),(231060154),(231060184),(231060214),(231060244),(231060274), +(231060304),(231060334),(231060364),(231060394),(231060424),(231060454), +(231060484),(231060514),(231060544),(231060574),(231060604),(231060634), +(231060664),(231060694),(231060724),(231060754),(231060784),(231060814), +(231060844),(231060874),(231060904),(231060934),(231060964),(231060994), +(231061024),(231061054),(231061084),(231061144),(231061174),(231061204), +(231061234),(231061294),(231061354),(231061384),(231061414),(231061474), +(231061564),(231061594),(231061624),(231061684),(231061714),(231061774), +(231061804),(231061894),(231061984),(231062074),(231062134),(231062224), +(231062254),(231062314),(231062374),(231062434),(231062494),(231062554), +(231062584),(231062614),(231062644),(231062704),(231062734),(231062794), +(231062854),(231062884),(231062944),(231063004),(231063034),(231063064), +(231063124),(231063154),(231063184),(231063214),(231063274),(231063334), +(231063394),(231063424),(231063454),(231063514),(231063574),(231063664); +CREATE TABLE t4 ( +carrier char(2) NOT NULL default '' PRIMARY KEY, +id int(11) default NULL, +INDEX id(id) +); +INSERT INTO t4 VALUES +('99',6),('SK',456),('UA',486),('AI',1081),('OS',1111),('VS',1510); +CREATE TABLE t5 ( +carrier_id int default NULL, +INDEX carrier_id(carrier_id) +); +INSERT INTO t5 VALUES +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6), +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6), +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6), +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6), +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6), +(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(456),(456),(456), +(456),(456),(456),(456),(456),(456),(456),(456),(456),(456),(456),(456), +(456),(486),(1081),(1111),(1111),(1111),(1111),(1510); +SELECT COUNT(*) +FROM((t2 JOIN t1 ON t2.package_id = t1.id) +JOIN t3 ON t3.package_id = t1.id); +COUNT(*) +6 +EXPLAIN +SELECT COUNT(*) +FROM ((t2 JOIN t1 ON t2.package_id = t1.id) +JOIN t3 ON t3.package_id = t1.id) +LEFT JOIN +(t5 JOIN t4 ON t5.carrier_id = t4.id) +ON t4.carrier = t1.carrier; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index package_id package_id 5 NULL 45 Using where; Using index +1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.package_id 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t4 eq_ref PRIMARY,id PRIMARY 2 test.t1.carrier 1 Using where +1 SIMPLE t5 ref carrier_id carrier_id 5 test.t4.id 22 Using index +1 SIMPLE t3 ref package_id package_id 5 test.t2.package_id 1 Using index +SELECT COUNT(*) +FROM ((t2 JOIN t1 ON t2.package_id = t1.id) +JOIN t3 ON t3.package_id = t1.id) +LEFT JOIN +(t5 JOIN t4 ON t5.carrier_id = t4.id) +ON t4.carrier = t1.carrier; +COUNT(*) +6 +DROP TABLE t1,t2,t3,t4,t5; +CREATE TABLE t1 ( +pk int NOT NULL AUTO_INCREMENT PRIMARY KEY, +a int DEFAULT NULL, +KEY idx(a) +); +CREATE TABLE t2 ( +pk int NOT NULL AUTO_INCREMENT PRIMARY KEY, +a int DEFAULT NULL, +KEY idx(a) +); +CREATE TABLE t3 ( +pk int NOT NULL AUTO_INCREMENT PRIMARY KEY, +a int DEFAULT NULL, +KEY idx(a) +); +INSERT INTO t1 VALUES +(1,2), (2,7), (3,5), (4,7), (5,5), (6,NULL), (7,NULL), (8,9); +INSERT INTO t2 VALUES +(1,NULL), (4,2), (5,2), (3,4), (2,8); +INSERT INTO t3 VALUES +(1,9), (2,2), (3,5), (4,2), (5,7), (6,0), (7,5); +SELECT t1.pk, t1.a, t2.pk, t2.a,t3.pk, t3.a +FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t3.a=t2.a) ON t2.a=t1.a; +pk a pk a pk a +1 2 4 2 2 2 +1 2 5 2 2 2 +1 2 4 2 4 2 +1 2 5 2 4 2 +2 7 NULL NULL NULL NULL +3 5 NULL NULL NULL NULL +4 7 NULL NULL NULL NULL +5 5 NULL NULL NULL NULL +6 NULL NULL NULL NULL NULL +7 NULL NULL NULL NULL NULL +8 9 NULL NULL NULL NULL +SELECT t1.pk, t1.a, t2.pk, t2.a,t3.pk, t3.a +FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t3.a=t2.a) ON t2.a=t1.a +WHERE t2.pk IS NULL; +pk a pk a pk a +2 7 NULL NULL NULL NULL +3 5 NULL NULL NULL NULL +4 7 NULL NULL NULL NULL +5 5 NULL NULL NULL NULL +6 NULL NULL NULL NULL NULL +7 NULL NULL NULL NULL NULL +8 9 NULL NULL NULL NULL +SELECT t1.pk, t1.a, t2.pk, t2.a,t3.pk, t3.a +FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t3.a=t2.a) ON t2.a=t1.a +WHERE t3.pk IS NULL; +pk a pk a pk a +2 7 NULL NULL NULL NULL +3 5 NULL NULL NULL NULL +4 7 NULL NULL NULL NULL +5 5 NULL NULL NULL NULL +6 NULL NULL NULL NULL NULL +7 NULL NULL NULL NULL NULL +8 9 NULL NULL NULL NULL +DROP TABLE t1, t2, t3; +CREATE TABLE t1 (a int NOT NULL ); +INSERT INTO t1 VALUES (9), (9); +CREATE TABLE t2 (a int NOT NULL ); +INSERT INTO t2 VALUES (9); +CREATE TABLE t3 (a int NOT NULL, b int); +INSERT INTO t3 VALUES (19,9); +CREATE TABLE t4 (b int) ; +SELECT * FROM t1 LEFT JOIN +((t2 LEFT JOIN t3 ON t2.a=t3.b) LEFT JOIN t4 ON t3.a=t4.b) +ON t1.a=t2.a; +a a a b b +9 9 19 9 NULL +9 9 19 9 NULL +SELECT * FROM t1 LEFT JOIN +((t2 LEFT JOIN t3 ON t2.a=t3.b) LEFT JOIN t4 ON t3.a=t4.b) +ON t1.a=t2.a +WHERE t3.a IS NULL; +a a a b b +EXPLAIN EXTENDED +SELECT * FROM t1 LEFT JOIN +((t2 LEFT JOIN t3 ON t2.a=t3.b) LEFT JOIN t4 ON t3.a=t4.b) +ON t1.a=t2.a +WHERE t3.a IS NULL; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 +1 SIMPLE t2 hash_ALL NULL #hash#$hj 4 test.t1.a 1 100.00 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE t3 hash_ALL NULL #hash#$hj 5 test.t1.a 1 100.00 Using where; Not exists; Using join buffer (incremental, BNLH join) +1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t3.a 0 0.00 Using where; Using join buffer (incremental, BNLH join) +Warnings: +Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`b` AS `b` from `test`.`t1` left join (`test`.`t2` left join `test`.`t3` on(`test`.`t3`.`b` = `test`.`t1`.`a`) left join `test`.`t4` on(`test`.`t4`.`b` = `test`.`t3`.`a` and `test`.`t3`.`a` is not null)) on(`test`.`t2`.`a` = `test`.`t1`.`a`) where `test`.`t3`.`a` is null +DROP TABLE t1,t2,t3,t4; +SET optimizer_switch=@save_optimizer_switch; +End of 5.0 tests +# +# MDEV-621: LP:693329 - Assertion `!is_interleave_error' failed on low optimizer_search_depth +# +set @tmp_mdev621= @@optimizer_search_depth; +SET SESSION optimizer_search_depth = 4; +CREATE TABLE t1 (f1 int,f2 int,f3 int,f4 int) ; +INSERT IGNORE INTO t1 VALUES (0,0,2,0),(NULL,0,2,0); +CREATE TABLE t2 (f1 int) ; +CREATE TABLE t3 (f3 int,PRIMARY KEY (f3)) ; +CREATE TABLE t4 (f5 int) ; +CREATE TABLE t5 (f2 int) ; +SELECT alias2.f4 FROM t1 AS alias1 +LEFT JOIN t1 AS alias2 +LEFT JOIN t2 AS alias3 +LEFT JOIN t3 AS alias4 ON alias3.f1 = alias4.f3 +ON alias2.f1 +LEFT JOIN t4 AS alias5 +JOIN t5 ON alias5.f5 +ON alias2.f3 ON alias1.f2; +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 `test`.`t2i`.`K2` is null)) where `test`.`t2a`.`K1r` = 1 and `test`.`t2i`.`K2` is null +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 `test`.`t2i`.`K2` is null)) where `t2a`.`K1r` = 1 and `test`.`t2i`.`K2` is null +DROP VIEW v1; +DROP TABLE t1,t2; +set optimizer_search_depth= @tmp_mdev621; +CREATE TABLE t5 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b)); +CREATE TABLE t6 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b)); +CREATE TABLE t7 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b)); +CREATE TABLE t8 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b)); +INSERT INTO t5 VALUES (1,1,0), (2,2,0), (3,3,0); +INSERT INTO t6 VALUES (1,2,0), (3,2,0), (6,1,0); +INSERT INTO t7 VALUES (1,1,0), (2,2,0); +INSERT INTO t8 VALUES (0,2,0), (1,2,0); +INSERT INTO t6 VALUES (-1,12,0), (-3,13,0), (-6,11,0), (-4,14,0); +INSERT INTO t7 VALUES (-1,11,0), (-2,12,0), (-3,13,0), (-4,14,0), (-5,15,0); +INSERT INTO t8 VALUES (-3,13,0), (-1,12,0), (-2,14,0), (-5,15,0), (-4,16,0); +EXPLAIN +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b AND +(t8.a > 0 OR t8.c IS NULL) AND t6.a>0 AND t7.a>0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 +1 SIMPLE t7 ref PRIMARY,b_i b_i 5 test.t5.b 2 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t6 ALL PRIMARY,b_i NULL NULL NULL 7 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 ref b_i b_i 5 test.t5.b 2 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 +LEFT JOIN +( +(t6, t7) +LEFT JOIN +t8 +ON t7.b=t8.b AND t6.b < 10 +) +ON t6.b >= 2 AND t5.b=t7.b AND +(t8.a > 0 OR t8.c IS NULL) AND t6.a>0 AND t7.a>0; +a b a b a b a b +2 2 1 2 2 2 1 2 +2 2 3 2 2 2 1 2 +1 1 1 2 1 1 NULL NULL +1 1 3 2 1 1 NULL NULL +3 3 NULL NULL NULL NULL NULL NULL +DELETE FROM t5; +DELETE FROM t6; +DELETE FROM t7; +DELETE FROM t8; +INSERT INTO t5 VALUES (1,3,0), (3,2,0); +INSERT INTO t6 VALUES (3,3,0); +INSERT INTO t7 VALUES (1,2,0); +INSERT INTO t8 VALUES (1,1,0); +EXPLAIN +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 LEFT JOIN +(t6 LEFT JOIN t7 ON t7.a=1, t8) +ON (t5.b=t8.b); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t5 ALL NULL NULL NULL NULL 2 +1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join) +1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join) +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 LEFT JOIN +(t6 LEFT JOIN t7 ON t7.a=1, t8) +ON (t5.b=t8.b); +a b a b a b a b +1 3 NULL NULL NULL NULL NULL NULL +3 2 NULL NULL NULL NULL NULL NULL +EXPLAIN +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 LEFT JOIN +(t6 LEFT JOIN t7 ON t7.b=2, t8) +ON (t5.b=t8.b); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t5 ALL NULL NULL NULL NULL 2 +1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join) +1 SIMPLE t7 ref b_i b_i 5 const 0 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join) +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 LEFT JOIN +(t6 LEFT JOIN t7 ON t7.b=2, t8) +ON (t5.b=t8.b); +a b a b a b a b +1 3 NULL NULL NULL NULL NULL NULL +3 2 NULL NULL NULL NULL NULL NULL +EXPLAIN +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 LEFT JOIN +(t8, t6 LEFT JOIN t7 ON t7.a=1) +ON (t5.b=t8.b); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t5 ALL NULL NULL NULL NULL 2 +1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (incremental, BNL join) +1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan +SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b +FROM t5 LEFT JOIN +(t8, t6 LEFT JOIN t7 ON t7.a=1) +ON (t5.b=t8.b); +a b a b a b a b +1 3 NULL NULL NULL NULL NULL NULL +3 2 NULL NULL NULL NULL NULL NULL +DROP TABLE t5,t6,t7,t8; +set join_cache_level=default; +show variables like 'join_cache_level'; +Variable_name Value +join_cache_level 2 +set @@optimizer_switch=@save_optimizer_switch_jcl6; +set @optimizer_switch_for_join_nested_test=NULL; +set @join_cache_level_for_join_nested_test=NULL; |