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into gleb.loc:/home/uchum/work/bk/5.1-opt mysql-test/r/create_not_windows.result: Auto merged mysql-test/r/join_nested.result: Auto merged mysql-test/r/symlink.result: Auto merged mysql-test/r/type_ranges.result: Auto merged mysql-test/r/type_time.result: Auto merged mysql-test/t/create.test: Auto merged mysql-test/t/create_not_windows.test: Auto merged mysql-test/t/symlink.test: Auto merged sql/item_cmpfunc.cc: Auto merged sql/sql_select.cc: Auto merged mysql-test/r/create.result: Merge with 5.0-opt. mysql-test/r/type_enum.result: Merge with 5.0-opt. mysql-test/t/type_enum.test: Merge with 5.0-opt. sql/field_conv.cc: Merge with 5.0-opt.
1747 lines
60 KiB
Plaintext
1747 lines
60 KiB
Plaintext
DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5,t6,t7,t8,t9;
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CREATE TABLE t0 (a int, b int, c int);
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CREATE TABLE t1 (a int, b int, c int);
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CREATE TABLE t2 (a int, b int, c int);
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CREATE TABLE t3 (a int, b int, c int);
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CREATE TABLE t4 (a int, b int, c int);
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CREATE TABLE t5 (a int, b int, c int);
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CREATE TABLE t6 (a int, b int, c int);
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CREATE TABLE t7 (a int, b int, c int);
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CREATE TABLE t8 (a int, b int, c int);
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CREATE TABLE t9 (a int, b int, c int);
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INSERT INTO t0 VALUES (1,1,0), (1,2,0), (2,2,0);
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INSERT INTO t1 VALUES (1,3,0), (2,2,0), (3,2,0);
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INSERT INTO t2 VALUES (3,3,0), (4,2,0), (5,3,0);
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INSERT INTO t3 VALUES (1,2,0), (2,2,0);
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INSERT INTO t4 VALUES (3,2,0), (4,2,0);
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INSERT INTO t5 VALUES (3,1,0), (2,2,0), (3,3,0);
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INSERT INTO t6 VALUES (3,2,0), (6,2,0), (6,1,0);
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INSERT INTO t7 VALUES (1,1,0), (2,2,0);
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INSERT INTO t8 VALUES (0,2,0), (1,2,0);
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INSERT INTO t9 VALUES (1,1,0), (1,2,0), (3,3,0);
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SELECT t2.a,t2.b
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FROM t2;
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a b
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3 3
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4 2
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5 3
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SELECT t3.a,t3.b
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FROM t3;
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a b
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1 2
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2 2
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SELECT t4.a,t4.b
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FROM t4;
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a b
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3 2
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4 2
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SELECT t3.a,t3.b,t4.a,t4.b
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FROM t3,t4;
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a b a b
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1 2 3 2
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2 2 3 2
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1 2 4 2
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2 2 4 2
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
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FROM t2
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LEFT JOIN
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(t3, t4)
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ON t2.b=t4.b;
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a b a b a b
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3 3 NULL NULL NULL NULL
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4 2 1 2 3 2
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4 2 1 2 4 2
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4 2 2 2 3 2
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4 2 2 2 4 2
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5 3 NULL NULL NULL NULL
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
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FROM t2
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LEFT JOIN
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(t3, t4)
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ON t3.a=1 AND t2.b=t4.b;
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a b a b a b
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3 3 NULL NULL NULL NULL
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4 2 1 2 3 2
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4 2 1 2 4 2
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5 3 NULL NULL NULL NULL
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EXPLAIN EXTENDED
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
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FROM t2
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LEFT JOIN
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(t3, t4)
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ON t2.b=t4.b
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WHERE t3.a=1 OR t3.c IS NULL;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
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1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
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1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00
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Warnings:
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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`)) where ((`test`.`t3`.`a` = 1) or isnull(`test`.`t3`.`c`))
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
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FROM t2
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LEFT JOIN
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(t3, t4)
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ON t2.b=t4.b
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WHERE t3.a=1 OR t3.c IS NULL;
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a b a b a b
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3 3 NULL NULL NULL NULL
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4 2 1 2 3 2
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4 2 1 2 4 2
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5 3 NULL NULL NULL NULL
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
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FROM t2
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LEFT JOIN
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(t3, t4)
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ON t2.b=t4.b
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WHERE t3.a>1 OR t3.c IS NULL;
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a b a b a b
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3 3 NULL NULL NULL NULL
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4 2 2 2 3 2
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4 2 2 2 4 2
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5 3 NULL NULL NULL NULL
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SELECT t5.a,t5.b
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FROM t5;
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a b
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3 1
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2 2
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3 3
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SELECT t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
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FROM t3,t4,t5;
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a b a b a b
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1 2 3 2 3 1
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2 2 3 2 3 1
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1 2 4 2 3 1
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2 2 4 2 3 1
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1 2 3 2 2 2
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2 2 3 2 2 2
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1 2 4 2 2 2
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2 2 4 2 2 2
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1 2 3 2 3 3
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2 2 3 2 3 3
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1 2 4 2 3 3
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2 2 4 2 3 3
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
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FROM t2
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LEFT JOIN
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(t3, t4, t5)
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ON t2.b=t4.b;
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a b a b a b a b
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3 3 NULL NULL NULL NULL NULL NULL
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4 2 1 2 3 2 3 1
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4 2 1 2 3 2 2 2
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4 2 1 2 3 2 3 3
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4 2 1 2 4 2 3 1
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4 2 1 2 4 2 2 2
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4 2 1 2 4 2 3 3
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4 2 2 2 3 2 3 1
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4 2 2 2 3 2 2 2
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4 2 2 2 3 2 3 3
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4 2 2 2 4 2 3 1
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4 2 2 2 4 2 2 2
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4 2 2 2 4 2 3 3
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5 3 NULL NULL NULL NULL NULL NULL
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EXPLAIN EXTENDED
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
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FROM t2
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LEFT JOIN
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(t3, t4, t5)
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ON t2.b=t4.b
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WHERE t3.a>1 OR t3.c IS NULL;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
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1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
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1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00
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1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00
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Warnings:
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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`)) where ((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`))
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
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FROM t2
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LEFT JOIN
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(t3, t4, t5)
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ON t2.b=t4.b
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WHERE t3.a>1 OR t3.c IS NULL;
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a b a b a b a b
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3 3 NULL NULL NULL NULL NULL NULL
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4 2 2 2 3 2 3 1
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4 2 2 2 3 2 2 2
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4 2 2 2 3 2 3 3
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4 2 2 2 4 2 3 1
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4 2 2 2 4 2 2 2
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4 2 2 2 4 2 3 3
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5 3 NULL NULL NULL NULL NULL NULL
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EXPLAIN EXTENDED
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
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FROM t2
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LEFT JOIN
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(t3, t4, t5)
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ON t2.b=t4.b
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WHERE (t3.a>1 OR t3.c IS NULL) AND
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(t5.a<3 OR t5.c IS NULL);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
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1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
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1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00
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1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where
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Warnings:
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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`)) where (((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`)) and ((`test`.`t5`.`a` < 3) or isnull(`test`.`t5`.`c`)))
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
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FROM t2
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LEFT JOIN
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(t3, t4, t5)
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ON t2.b=t4.b
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WHERE (t3.a>1 OR t3.c IS NULL) AND
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(t5.a<3 OR t5.c IS NULL);
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a b a b a b a b
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3 3 NULL NULL NULL NULL NULL NULL
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4 2 2 2 3 2 2 2
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4 2 2 2 4 2 2 2
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5 3 NULL NULL NULL NULL NULL NULL
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SELECT t6.a,t6.b
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FROM t6;
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a b
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3 2
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6 2
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6 1
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SELECT t7.a,t7.b
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FROM t7;
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a b
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1 1
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2 2
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SELECT t6.a,t6.b,t7.a,t7.b
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FROM t6,t7;
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a b a b
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3 2 1 1
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3 2 2 2
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6 2 1 1
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6 2 2 2
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6 1 1 1
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6 1 2 2
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SELECT t8.a,t8.b
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FROM t8;
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a b
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0 2
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1 2
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EXPLAIN EXTENDED
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SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
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FROM (t6, t7)
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LEFT JOIN
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t8
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ON t7.b=t8.b AND t6.b < 10;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00
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1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer
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1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00
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Warnings:
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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`.`t7`.`b` = `test`.`t8`.`b`) and (`test`.`t6`.`b` < 10))) where 1
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SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
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FROM (t6, t7)
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LEFT JOIN
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t8
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ON t7.b=t8.b AND t6.b < 10;
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a b a b a b
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3 2 1 1 NULL NULL
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3 2 2 2 0 2
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3 2 2 2 1 2
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6 2 1 1 NULL NULL
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6 2 2 2 0 2
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6 2 2 2 1 2
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6 1 1 1 NULL NULL
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6 1 2 2 0 2
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6 1 2 2 1 2
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SELECT t5.a,t5.b
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FROM t5;
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a b
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3 1
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2 2
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3 3
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SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
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FROM t5
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LEFT JOIN
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(
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(t6, t7)
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LEFT JOIN
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t8
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ON t7.b=t8.b AND t6.b < 10
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)
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ON t6.b >= 2 AND t5.b=t7.b;
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a b a b a b a b
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3 1 3 2 1 1 NULL NULL
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3 1 6 2 1 1 NULL NULL
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2 2 3 2 2 2 0 2
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2 2 3 2 2 2 1 2
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2 2 6 2 2 2 0 2
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2 2 6 2 2 2 1 2
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3 3 NULL NULL NULL NULL NULL NULL
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SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
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FROM t5
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LEFT JOIN
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(
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(t6, t7)
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LEFT JOIN
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t8
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ON t7.b=t8.b AND t6.b < 10
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)
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ON t6.b >= 2 AND t5.b=t7.b AND
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(t8.a < 1 OR t8.c IS NULL);
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a b a b a b a b
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3 1 3 2 1 1 NULL NULL
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3 1 6 2 1 1 NULL NULL
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2 2 3 2 2 2 0 2
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2 2 6 2 2 2 0 2
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3 3 NULL NULL NULL NULL NULL NULL
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
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FROM t2
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LEFT JOIN
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(t3, t4)
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ON t3.a=1 AND t2.b=t4.b;
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a b a b a b
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3 3 NULL NULL NULL NULL
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4 2 1 2 3 2
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4 2 1 2 4 2
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5 3 NULL NULL NULL NULL
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SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
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t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
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FROM t2
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LEFT JOIN
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(t3, t4)
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ON t3.a=1 AND t2.b=t4.b,
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t5
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LEFT JOIN
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(
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(t6, t7)
|
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LEFT JOIN
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t8
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ON t7.b=t8.b AND t6.b < 10
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)
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ON t6.b >= 2 AND t5.b=t7.b;
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a b a b a b a b a b a b a b
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3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
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3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
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4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
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4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
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4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
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4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
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5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
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5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
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3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
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3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
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3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
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3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
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4 2 1 2 3 2 2 2 3 2 2 2 0 2
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4 2 1 2 3 2 2 2 3 2 2 2 1 2
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4 2 1 2 3 2 2 2 6 2 2 2 0 2
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4 2 1 2 3 2 2 2 6 2 2 2 1 2
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4 2 1 2 4 2 2 2 3 2 2 2 0 2
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4 2 1 2 4 2 2 2 3 2 2 2 1 2
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4 2 1 2 4 2 2 2 6 2 2 2 0 2
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4 2 1 2 4 2 2 2 6 2 2 2 1 2
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5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
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|
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
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|
5 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 1 2
|
|
3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
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4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
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4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
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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,
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t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
|
|
FROM t2
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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
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|
WHERE t2.a > 3 AND
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|
(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 3 1 3 2 1 1 NULL NULL
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|
4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
|
|
5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
|
|
4 2 1 2 3 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 0 2
|
|
4 2 1 2 4 2 2 2 3 2 2 2 1 2
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|
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
|
|
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 3 3 NULL NULL NULL NULL NULL NULL
|
|
SELECT t1.a,t1.b
|
|
FROM t1;
|
|
a b
|
|
1 3
|
|
2 2
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|
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
|
|
1 3 3 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
|
|
1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
|
|
1 3 3 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 0 2
|
|
1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
|
|
1 3 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
|
|
1 3 4 2 1 2 3 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
|
|
1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
|
|
1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
|
|
1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
|
|
1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
|
|
1 3 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
|
|
1 3 5 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 1 2
|
|
1 3 5 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 1 2
|
|
1 3 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
|
|
3 2 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
|
|
3 2 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
|
|
3 2 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 1 2
|
|
3 2 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 1 2
|
|
3 2 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
|
|
3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
|
|
3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
|
|
3 2 4 2 1 2 3 2 2 2 3 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 3 2 2 2 6 2 2 2 0 2
|
|
3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
|
|
3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
|
|
3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
|
|
3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
|
|
3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
|
|
3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
|
|
3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
|
|
3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
|
|
3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
|
|
3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
|
|
3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
|
|
3 2 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 1 2
|
|
3 2 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 1 2
|
|
3 2 5 3 NULL NULL NULL NULL 3 3 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
|
|
1 3 4 2 1 2 3 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
|
|
1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
|
|
1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
|
|
1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
|
|
1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
|
|
1 3 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
|
|
1 3 5 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 1 2
|
|
1 3 5 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 1 2
|
|
1 3 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
|
|
3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
|
|
3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
|
|
3 2 4 2 1 2 3 2 2 2 3 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 3 2 2 2 6 2 2 2 0 2
|
|
3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
|
|
3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
|
|
3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
|
|
3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
|
|
3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
|
|
3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
|
|
3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
|
|
3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
|
|
3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
|
|
3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
|
|
3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
|
|
3 2 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 1 2
|
|
3 2 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 1 2
|
|
3 2 5 3 NULL NULL NULL NULL 3 3 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 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00
|
|
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00
|
|
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00
|
|
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00
|
|
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00
|
|
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00
|
|
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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) 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)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) where ((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)))
|
|
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 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
|
|
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 3 2 3 1 6 2 1 1 NULL NULL
|
|
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 3 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 0 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 3 2 3 3 NULL NULL NULL NULL 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 4 2 3 1 6 2 1 1 NULL NULL
|
|
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 4 2 2 2 3 2 2 2 1 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 4 2 2 2 6 2 2 2 1 2
|
|
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 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 2 2 3 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 0 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 3 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 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
|
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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) 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)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
|
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 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1
|
|
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 3 NULL NULL NULL NULL 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 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
|
|
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 3 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
|
|
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 3 2 2 2 6 2 2 2 0 2 1 2
|
|
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 1 6 2 1 1 NULL NULL 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 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 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 3 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
|
|
3 3 NULL NULL
|
|
4 2 1 2
|
|
4 2 2 2
|
|
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 3 3 NULL NULL
|
|
2 2 3 3 NULL NULL
|
|
1 3 4 2 1 2
|
|
1 3 4 2 2 2
|
|
2 2 4 2 1 2
|
|
2 2 4 2 2 2
|
|
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 3 3 NULL NULL
|
|
2 2 3 3 NULL NULL
|
|
1 3 4 2 1 2
|
|
1 3 4 2 2 2
|
|
2 2 4 2 1 2
|
|
2 2 4 2 2 2
|
|
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
|
|
3 3 NULL NULL NULL NULL
|
|
4 2 1 2 3 2
|
|
4 2 1 2 4 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, 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 3 3 NULL NULL NULL NULL
|
|
2 2 3 3 NULL NULL NULL NULL
|
|
1 3 4 2 1 2 3 2
|
|
1 3 4 2 1 2 4 2
|
|
2 2 4 2 1 2 3 2
|
|
2 2 4 2 1 2 4 2
|
|
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 3 3 NULL NULL NULL NULL
|
|
2 2 3 3 NULL NULL NULL NULL
|
|
1 3 4 2 1 2 3 2
|
|
1 3 4 2 1 2 4 2
|
|
2 2 4 2 1 2 3 2
|
|
2 2 4 2 1 2 4 2
|
|
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 3 3 NULL NULL NULL NULL
|
|
2 2 3 3 NULL NULL NULL NULL
|
|
1 3 4 2 1 2 3 2
|
|
1 3 4 2 1 2 4 2
|
|
2 2 4 2 1 2 3 2
|
|
2 2 4 2 1 2 4 2
|
|
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
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00
|
|
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00
|
|
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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) where (`test`.`t1`.`a` <= 2)
|
|
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;
|
|
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
|
|
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
|
|
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`.`t3`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` = `test`.`t4`.`b`))) 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;
|
|
a b a b a b
|
|
4 2 1 2 3 2
|
|
4 2 1 2 3 2
|
|
4 2 1 2 3 2
|
|
NULL NULL 2 2 3 2
|
|
4 2 1 2 4 2
|
|
4 2 1 2 4 2
|
|
4 2 1 2 4 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,
|
|
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 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
|
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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) 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)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
|
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,
|
|
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 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
|
|
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
|
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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) 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)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
|
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,
|
|
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 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
|
|
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where
|
|
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
|
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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) 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)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
|
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),
|
|
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 where
|
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
|
|
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
|
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where
|
|
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer
|
|
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`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) 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)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
|
|
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 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1
|
|
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 3 NULL NULL NULL NULL 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 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
|
|
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 3 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
|
|
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 3 2 2 2 6 2 2 2 0 2 1 2
|
|
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 1 6 2 1 1 NULL NULL 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 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 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 3 NULL NULL NULL NULL NULL NULL 1 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
|
|
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
|
|
1 NULL NULL
|
|
2 2 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
|
|
2 2 2
|
|
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 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 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 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 ALL NULL NULL NULL NULL 0
|
|
1 SIMPLE t3 ALL NULL NULL NULL NULL 0
|
|
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
|
|
1 NULL
|
|
2 NULL
|
|
3 2340
|
|
4 NULL
|
|
5 NULL
|
|
6 9900
|
|
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
|
|
1 NULL
|
|
2 NULL
|
|
3 2340
|
|
4 NULL
|
|
5 NULL
|
|
6 9900
|
|
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
|
|
1 NULL
|
|
2 NULL
|
|
3 2340
|
|
4 NULL
|
|
5 NULL
|
|
6 9900
|
|
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
|
|
1 SIMPLE t5 ref a a 5 test.t3.b X
|
|
1 SIMPLE t4 ref a a 5 test.t3.b X Using where
|
|
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 where
|
|
1 SIMPLE t4 ref a a 5 test.t3.b X
|
|
1 SIMPLE t6 ref a a 5 test.t4.b X
|
|
1 SIMPLE t5 ref a a 5 test.t2.b X
|
|
1 SIMPLE t7 ref a a 5 test.t5.b X
|
|
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
|
|
1 SIMPLE t4 ref a a 5 test.t3.b X
|
|
1 SIMPLE t6 ref a a 5 test.t4.b X
|
|
1 SIMPLE t5 ref a a 5 test.t3.b X
|
|
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
|
|
1 SIMPLE t3 ref a a 5 test.t2.a 1
|
|
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 index
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.package_id 1
|
|
1 SIMPLE t4 eq_ref PRIMARY,id PRIMARY 2 test.t1.carrier 1
|
|
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.t1.id 1 Using where; 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;
|
|
End of 5.0 tests
|