diff --git a/mysql-test/r/partition.result b/mysql-test/r/partition.result index 23a485dc5ed..90b4bf92af5 100644 --- a/mysql-test/r/partition.result +++ b/mysql-test/r/partition.result @@ -1382,7 +1382,7 @@ NULL 2 explain partitions select * from t1 where a is null or a < 0 or a > 1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pn,p2 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t1 pn,p2 ALL NULL NULL NULL NULL 2 Using where drop table t1; CREATE TABLE t1 (id INT NOT NULL PRIMARY KEY, name VARCHAR(20)) ENGINE=MyISAM DEFAULT CHARSET=latin1 diff --git a/mysql-test/r/partition_hash.result b/mysql-test/r/partition_hash.result index 19da70db5a0..94fefe77a77 100644 --- a/mysql-test/r/partition_hash.result +++ b/mysql-test/r/partition_hash.result @@ -69,25 +69,25 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0,p1,p2,p3 ALL NULL NULL NULL NULL 9 Using where explain partitions select * from t1 where a is null or (a >= 5 and a <= 7); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p2,p3 ALL NULL NULL NULL NULL 9 Using where +1 SIMPLE t1 p0,p2,p3 ALL NULL NULL NULL NULL 7 Using where explain partitions select * from t1 where a is null; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 9 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 3 Using where explain partitions select * from t1 where a is not null; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0,p1,p2,p3 ALL NULL NULL NULL NULL 9 Using where explain partitions select * from t1 where a >= 1 and a < 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 9 Using where +1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 5 Using where explain partitions select * from t1 where a >= 3 and a <= 5; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p1,p2 ALL NULL NULL NULL NULL 9 Using where +1 SIMPLE t1 p1,p2 ALL NULL NULL NULL NULL 4 Using where explain partitions select * from t1 where a > 2 and a < 4; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p1 ALL NULL NULL NULL NULL 9 Using where +1 SIMPLE t1 p1 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a > 3 and a <= 6; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2,p3 ALL NULL NULL NULL NULL 9 Using where +1 SIMPLE t1 p2,p3 ALL NULL NULL NULL NULL 4 Using where explain partitions select * from t1 where a > 5; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0,p1,p2,p3 ALL NULL NULL NULL NULL 9 Using where diff --git a/mysql-test/r/partition_innodb.result b/mysql-test/r/partition_innodb.result index 2a04aafe554..238fbf4662c 100644 --- a/mysql-test/r/partition_innodb.result +++ b/mysql-test/r/partition_innodb.result @@ -22,31 +22,31 @@ insert INTO t1 VALUES (110); ERROR HY000: Table has no partition for value 110 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 90; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where +1 SIMPLE t1 ALL NULL NULL NULL NULL 0 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 90; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where +1 SIMPLE t1 ALL NULL NULL NULL NULL 0 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = 90; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where +1 SIMPLE t1 ALL NULL NULL NULL NULL 0 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = 89; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p90 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p90 ALL NULL NULL NULL NULL 3 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 89; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p90 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p90 ALL NULL NULL NULL NULL 3 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 89; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 ALL NULL NULL NULL NULL 0 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = 100; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 ALL NULL NULL NULL NULL 0 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 100; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 ALL NULL NULL NULL NULL 0 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 100; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 ALL NULL NULL NULL NULL 0 Using where DROP TABLE t1; # # Bug#50104: Partitioned table with just 1 partion works with fk diff --git a/mysql-test/r/partition_pruning.result b/mysql-test/r/partition_pruning.result index 568c21b27be..01ae3876fd0 100644 --- a/mysql-test/r/partition_pruning.result +++ b/mysql-test/r/partition_pruning.result @@ -1,5 +1,29 @@ drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9; # +# Bug#53806: Wrong estimates for range query in partitioned MyISAM table +# Bug#46754: 'rows' field doesn't reflect partition pruning +# +CREATE TABLE t1 (a INT PRIMARY KEY) +PARTITION BY RANGE (a) ( +PARTITION p0 VALUES LESS THAN (1), +PARTITION p1 VALUES LESS THAN (2), +PARTITION p2 VALUES LESS THAN (3), +PARTITION p3 VALUES LESS THAN (4), +PARTITION p4 VALUES LESS THAN (5), +PARTITION p5 VALUES LESS THAN (6), +PARTITION max VALUES LESS THAN MAXVALUE); +INSERT INTO t1 VALUES (-1),(0),(1),(2),(3),(4),(5),(6),(7),(8); +EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 1; +id select_type table partitions type possible_keys key key_len ref rows Extra +# # # # # # # # # 3 # +EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < 7; +id select_type table partitions type possible_keys key key_len ref rows Extra +# # # # # # # # # 9 # +EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 1; +id select_type table partitions type possible_keys key key_len ref rows Extra +# # # # # # # # # 3 # +DROP TABLE t1; +# # Bug#49742: Partition Pruning not working correctly for RANGE # CREATE TABLE t1 (a INT PRIMARY KEY) @@ -89,7 +113,7 @@ a 1 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1 index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p0,p1 index PRIMARY PRIMARY 4 NULL 3 Using where; Using index SELECT * FROM t1 WHERE a <= 2; a -1 @@ -98,7 +122,7 @@ a 2 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 2; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2 index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p0,p1,p2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index SELECT * FROM t1 WHERE a <= 3; a -1 @@ -108,7 +132,7 @@ a 3 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3 index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3 index PRIMARY PRIMARY 4 NULL 5 Using where; Using index SELECT * FROM t1 WHERE a <= 4; a -1 @@ -119,7 +143,7 @@ a 4 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 4; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3,p4 index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3,p4 index PRIMARY PRIMARY 4 NULL 6 Using where; Using index SELECT * FROM t1 WHERE a <= 5; a -1 @@ -131,7 +155,7 @@ a 5 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 5; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3,p4,p5 index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3,p4,p5 index PRIMARY PRIMARY 4 NULL 7 Using where; Using index SELECT * FROM t1 WHERE a <= 6; a -1 @@ -213,7 +237,7 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p1,p2,p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p1,p2,p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 8 Using where; Using index SELECT * FROM t1 WHERE a >= 2; a 2 @@ -225,7 +249,7 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 2; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2,p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p2,p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 7 Using where; Using index SELECT * FROM t1 WHERE a >= 3; a 3 @@ -236,7 +260,7 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 6 Using where; Using index SELECT * FROM t1 WHERE a >= 4; a 4 @@ -246,7 +270,7 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 4; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4,p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p4,p5,max index PRIMARY PRIMARY 4 NULL 5 Using where; Using index SELECT * FROM t1 WHERE a >= 5; a 5 @@ -255,7 +279,7 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 5; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p5,max index PRIMARY PRIMARY 4 NULL 4 Using where; Using index SELECT * FROM t1 WHERE a >= 6; a 6 @@ -263,14 +287,14 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 6; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 3 Using where; Using index SELECT * FROM t1 WHERE a >= 7; a 7 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 7; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 3 Using where; Using index SELECT * FROM t1 WHERE a > 1; a 2 @@ -282,7 +306,7 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2,p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p2,p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 7 Using where; Using index SELECT * FROM t1 WHERE a > 2; a 3 @@ -293,7 +317,7 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 2; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 6 Using where; Using index SELECT * FROM t1 WHERE a > 3; a 4 @@ -303,7 +327,7 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4,p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p4,p5,max index PRIMARY PRIMARY 4 NULL 5 Using where; Using index SELECT * FROM t1 WHERE a > 4; a 5 @@ -312,7 +336,7 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 4; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 p5,max index PRIMARY PRIMARY 4 NULL 4 Using where; Using index SELECT * FROM t1 WHERE a > 5; a 6 @@ -320,20 +344,20 @@ a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 5; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 3 Using where; Using index SELECT * FROM t1 WHERE a > 6; a 7 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 6; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 3 Using where; Using index SELECT * FROM t1 WHERE a > 7; a 8 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 7; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index +1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 3 Using where; Using index DROP TABLE t1; CREATE TABLE t1 (a INT PRIMARY KEY) PARTITION BY RANGE (a) ( @@ -408,7 +432,7 @@ a 1 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1 index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p0,p1 index PRIMARY PRIMARY 4 NULL 3 Using where; Using index SELECT * FROM t1 WHERE a <= 2; a -1 @@ -417,7 +441,7 @@ a 2 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 2; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2 index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p0,p1,p2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index SELECT * FROM t1 WHERE a <= 3; a -1 @@ -427,7 +451,7 @@ a 3 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3 index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3 index PRIMARY PRIMARY 4 NULL 5 Using where; Using index SELECT * FROM t1 WHERE a <= 4; a -1 @@ -438,7 +462,7 @@ a 4 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 4; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3,p4 index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3,p4 index PRIMARY PRIMARY 4 NULL 6 Using where; Using index SELECT * FROM t1 WHERE a <= 5; a -1 @@ -511,7 +535,7 @@ a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p1,p2,p3,p4,max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p1,p2,p3,p4,max index PRIMARY PRIMARY 4 NULL 7 Using where; Using index SELECT * FROM t1 WHERE a >= 2; a 2 @@ -522,7 +546,7 @@ a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 2; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2,p3,p4,max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p2,p3,p4,max index PRIMARY PRIMARY 4 NULL 6 Using where; Using index SELECT * FROM t1 WHERE a >= 3; a 3 @@ -532,7 +556,7 @@ a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p3,p4,max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p3,p4,max index PRIMARY PRIMARY 4 NULL 5 Using where; Using index SELECT * FROM t1 WHERE a >= 4; a 4 @@ -541,7 +565,7 @@ a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 4; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4,max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p4,max index PRIMARY PRIMARY 4 NULL 4 Using where; Using index SELECT * FROM t1 WHERE a >= 5; a 5 @@ -549,14 +573,14 @@ a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 5; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 3 Using where; Using index SELECT * FROM t1 WHERE a >= 6; a 6 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= 6; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 3 Using where; Using index SELECT * FROM t1 WHERE a > 1; a 2 @@ -567,7 +591,7 @@ a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2,p3,p4,max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p2,p3,p4,max index PRIMARY PRIMARY 4 NULL 6 Using where; Using index SELECT * FROM t1 WHERE a > 2; a 3 @@ -577,7 +601,7 @@ a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 2; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p3,p4,max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p3,p4,max index PRIMARY PRIMARY 4 NULL 5 Using where; Using index SELECT * FROM t1 WHERE a > 3; a 4 @@ -586,7 +610,7 @@ a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4,max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p4,max index PRIMARY PRIMARY 4 NULL 4 Using where; Using index SELECT * FROM t1 WHERE a > 4; a 5 @@ -594,20 +618,20 @@ a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 4; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 3 Using where; Using index SELECT * FROM t1 WHERE a > 5; a 6 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 5; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 3 Using where; Using index SELECT * FROM t1 WHERE a > 6; a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > 6; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 max index PRIMARY PRIMARY 4 NULL 3 Using where; Using index DROP TABLE t1; # test of RANGE and index CREATE TABLE t1 (a DATE, KEY(a)) @@ -757,10 +781,10 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01,p2001-01-01 range a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p2001-01-01 index a a 4 NULL 7 Using where; Using index +1 SIMPLE t1 pNULL,p2001-01-01 index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p2001-01-01 index a a 4 NULL 7 Using where; Using index +1 SIMPLE t1 pNULL,p2001-01-01 index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL ref a a 4 const 1 Using where; Using index @@ -880,34 +904,34 @@ a 1001-01-01 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p2001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p2001-01-01 ALL NULL NULL NULL NULL 4 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1001-01-01 system NULL NULL NULL NULL 1 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL ALL NULL NULL NULL NULL 3 Using where # Disabling warnings for the invalid date EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra @@ -917,25 +941,25 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01,p2001-01-01 ALL NULL NULL NULL NULL 7 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p2001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p2001-01-01 ALL NULL NULL NULL NULL 4 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p2001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p2001-01-01 ALL NULL NULL NULL NULL 4 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL ALL NULL NULL NULL NULL 3 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01,p2001-01-01 ALL NULL NULL NULL NULL 7 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-02' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-01' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where DROP TABLE t1; # test of LIST and index CREATE TABLE t1 (a DATE, KEY(a)) @@ -1086,10 +1110,10 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL index a a 4 NULL 7 Using where; Using index +1 SIMPLE t1 p2001-01-01,pNULL index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL index a a 4 NULL 7 Using where; Using index +1 SIMPLE t1 p2001-01-01,pNULL index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL ref a a 4 const 1 Using where; Using index @@ -1101,7 +1125,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-02' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p1001-01-01 index a a 4 NULL 7 Using where; Using index +1 SIMPLE t1 pNULL,p1001-01-01 index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-01' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0001-01-01,pNULL,p1001-01-01 range a a 4 NULL 3 Using where; Using index @@ -1209,62 +1233,62 @@ a 1001-01-01 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p2001-01-01,pNULL ALL NULL NULL NULL NULL 4 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1001-01-01 system NULL NULL NULL NULL 1 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL ALL NULL NULL NULL NULL 3 Using where # Disabling warnings for the invalid date EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p2001-01-01,pNULL ALL NULL NULL NULL NULL 4 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p2001-01-01,pNULL ALL NULL NULL NULL NULL 4 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL ALL NULL NULL NULL NULL 3 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-02' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 pNULL,p1001-01-01 ALL NULL NULL NULL NULL 4 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-01' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p1001-01-01 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p0001-01-01,pNULL,p1001-01-01 ALL NULL NULL NULL NULL 5 Using where DROP TABLE t1; # Test with DATETIME column NOT NULL CREATE TABLE t1 ( @@ -1289,25 +1313,25 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 index NULL PRIMARY 12 NULL 8 Using where; Using index +1 SIMPLE t1 p20090403 index NULL PRIMARY 12 NULL 2 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090402 index NULL PRIMARY 12 NULL 3 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -1315,99 +1339,99 @@ id select_type table partitions type possible_keys key key_len ref rows Extra EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090403 index NULL PRIMARY 12 NULL 2 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090403 index NULL PRIMARY 12 NULL 2 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090402 index NULL PRIMARY 12 NULL 3 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p20090401,p20090402,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090403 index NULL PRIMARY 12 NULL 2 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 12 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090403 index NULL PRIMARY 12 NULL 2 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 12 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090402 index NULL PRIMARY 12 NULL 13 Using where; Using index +1 SIMPLE t1 p20090402 index NULL PRIMARY 12 NULL 3 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -1440,21 +1464,21 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 7 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 index NULL PRIMARY 7 NULL 7 Using where; Using index +1 SIMPLE t1 p20090403 index NULL PRIMARY 7 NULL 2 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -1462,79 +1486,79 @@ id select_type table partitions type possible_keys key key_len ref rows Extra EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 7 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090403 index NULL PRIMARY 7 NULL 2 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 7 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090403 index NULL PRIMARY 7 NULL 2 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 7 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090403 index NULL PRIMARY 7 NULL 2 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 7 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402,p20090403 index NULL PRIMARY 7 NULL 7 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -1542,19 +1566,19 @@ id select_type table partitions type possible_keys key key_len ref rows Extra EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090404,p20090405 index NULL PRIMARY 7 NULL 8 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090402 index NULL PRIMARY 7 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -1562,11 +1586,11 @@ id select_type table partitions type possible_keys key key_len ref rows Extra EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 10 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 12 Using where; Using index +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 index NULL PRIMARY 7 NULL 10 Using where; Using index DROP TABLE t1; # Test with DATETIME column NULL CREATE TABLE t1 ( @@ -1590,25 +1614,25 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 8 Using where +1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090402 ALL NULL NULL NULL NULL 3 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -1616,99 +1640,99 @@ id select_type table partitions type possible_keys key key_len ref rows Extra EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090402 ALL NULL NULL NULL NULL 3 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p20090401,p20090402,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 6 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090402 ALL NULL NULL NULL NULL 13 Using where +1 SIMPLE t1 p20090402 ALL NULL NULL NULL NULL 3 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -1740,21 +1764,21 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 7 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -1762,79 +1786,79 @@ id select_type table partitions type possible_keys key key_len ref rows Extra EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-02 23:59:59' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 7 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATE); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 7 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03 00:00:00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-02 23:59:59'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 7 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090403 ALL NULL NULL NULL NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 7 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402,p20090403 ALL NULL NULL NULL NULL 7 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -1842,19 +1866,19 @@ id select_type table partitions type possible_keys key key_len ref rows Extra EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03 00:00:01' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090404,p20090405 ALL NULL NULL NULL NULL 8 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090402 ALL NULL NULL NULL NULL 5 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -1862,11 +1886,11 @@ id select_type table partitions type possible_keys key key_len ref rows Extra EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-02 23:59:58' AS DATETIME); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t1 p20090401,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 10 Using where DROP TABLE t1; # For better code coverage of the patch CREATE TABLE t1 ( @@ -1930,7 +1954,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1 ALL NULL NULL NULL NULL 3 Using where explain partitions select * from t2 where a=1 and b=1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p0 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t2 p0 ALL NULL NULL NULL NULL 2 Using where create table t3 ( a int ) @@ -1988,25 +2012,25 @@ id select_type table partitions type possible_keys key key_len ref rows Extra explain partitions select * from t5 where (a=10 and b=1) or (a=10 and b=2) or (a=10 and b = 3); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t5 p0_p0sp0,p0_p0sp1 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t5 p0_p0sp0,p0_p0sp1 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t5 where (a=10 and b=2) or (a=10 and b=3) or (a=10 and b = 4); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t5 p0_p0sp0,p0_p0sp1,p1_p1sp0,p1_p1sp1 ALL NULL NULL NULL NULL 4 Using where explain partitions select * from t5 where (c=1 and d=1); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t5 p0_p0sp0,p1_p1sp0 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t5 p0_p0sp0,p1_p1sp0 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t5 where (c=2 and d=1); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t5 p0_p0sp1,p1_p1sp1 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t5 p0_p0sp1,p1_p1sp1 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t5 where (a=10 and b=2 and c=1 and d=1) or (c=2 and d=1); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t5 p0_p0sp0,p0_p0sp1,p1_p1sp1 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t5 p0_p0sp0,p0_p0sp1,p1_p1sp1 ALL NULL NULL NULL NULL 3 Using where explain partitions select * from t5 where (a=10 and b=2 and c=1 and d=1) or (b=2 and c=2 and d=1); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t5 p0_p0sp0,p0_p0sp1,p1_p1sp1 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t5 p0_p0sp0,p0_p0sp1,p1_p1sp1 ALL NULL NULL NULL NULL 3 Using where create table t6 (a int not null) partition by LIST(a) ( partition p1 values in (1), partition p3 values in (3), @@ -2044,7 +2068,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t6 p5,p7,p9 system NULL NULL NULL NULL 1 explain partitions select * from t6 where a >= 3 and a <= 8; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t6 p3,p5,p7 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t6 p3,p5,p7 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t6 where a > 3 and a < 5; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables @@ -2086,7 +2110,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t6 p5,p7,p9 system NULL NULL NULL NULL 1 explain partitions select * from t6 where a >= 3 and a <= 8; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t6 p3,p5,p7 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t6 p3,p5,p7 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t6 where a > 3 and a < 5; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables @@ -2325,7 +2349,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra explain partitions select * from t1 X, t1 Y where X.a = Y.a and (X.a=1 or X.a=2); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE X p1,p2 ALL a NULL NULL NULL 4 Using where +1 SIMPLE X p1,p2 ALL a NULL NULL NULL 2 Using where 1 SIMPLE Y p1,p2 ref a a 4 test.X.a 2 drop table t1; create table t1 (a int) partition by hash(a) partitions 20; @@ -2338,7 +2362,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1,p2 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a > 1 and a <= 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2,p3 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t1 p2,p3 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a >= 1 and a <= 3; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1,p2,p3 ALL NULL NULL NULL NULL 3 Using where @@ -2428,22 +2452,22 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2,p3,p4 ALL NULL NULL NULL NULL 1010 explain partitions select * from t2 where a < 801 and a > 200; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p1,p2,p3,p4 ALL NULL NULL NULL NULL 1010 Using where +1 SIMPLE t2 p1,p2,p3,p4 ALL NULL NULL NULL NULL 800 Using where explain partitions select * from t2 where a < 801 and a > 800; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p4 ALL NULL NULL NULL NULL 1010 Using where +1 SIMPLE t2 p4 ALL NULL NULL NULL NULL 200 Using where explain partitions select * from t2 where a > 600; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p3,p4 ALL NULL NULL NULL NULL 1010 Using where +1 SIMPLE t2 p3,p4 ALL NULL NULL NULL NULL 400 Using where explain partitions select * from t2 where a > 600 and b = 1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p3,p4 ALL NULL NULL NULL NULL 1010 Using where +1 SIMPLE t2 p3,p4 ALL NULL NULL NULL NULL 400 Using where explain partitions select * from t2 where a > 600 and b = 4; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p3,p4 ALL NULL NULL NULL NULL 1010 Using where +1 SIMPLE t2 p3,p4 ALL NULL NULL NULL NULL 400 Using where explain partitions select * from t2 where a > 600 and b = 5; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p3,p4 ALL NULL NULL NULL NULL 1010 Using where +1 SIMPLE t2 p3,p4 ALL NULL NULL NULL NULL 400 Using where explain partitions select * from t2 where b = 5; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2,p3,p4 ALL NULL NULL NULL NULL 1010 Using where @@ -2498,19 +2522,19 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2,p3,p4 ALL NULL NULL NULL NULL 910 explain partitions select * from t2 where a = 101; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p0 ALL NULL NULL NULL NULL 910 Using where +1 SIMPLE t2 p0 ALL NULL NULL NULL NULL 110 Using where explain partitions select * from t2 where a = 550; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p2 ALL NULL NULL NULL NULL 910 Using where +1 SIMPLE t2 p2 ALL NULL NULL NULL NULL 200 Using where explain partitions select * from t2 where a = 833; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p4 ALL NULL NULL NULL NULL 910 Using where +1 SIMPLE t2 p4 ALL NULL NULL NULL NULL 200 Using where explain partitions select * from t2 where (a = 100 OR a = 900); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p0,p4 ALL NULL NULL NULL NULL 910 Using where +1 SIMPLE t2 p0,p4 ALL NULL NULL NULL NULL 310 Using where explain partitions select * from t2 where (a > 100 AND a < 600); id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p0,p1,p2 ALL NULL NULL NULL NULL 910 Using where +1 SIMPLE t2 p0,p1,p2 ALL NULL NULL NULL NULL 510 Using where explain partitions select * from t2 where b = 4; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2,p3,p4 ref b b 5 const 76 Using where @@ -2796,17 +2820,17 @@ id select_type table partitions type possible_keys key key_len ref rows Extra explain partitions select * from t1 where a >= 18446744073709551000-1 and a <= 18446744073709551000+1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p3,p4 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t1 p3,p4 ALL NULL NULL NULL NULL 3 Using where explain partitions select * from t1 where a between 18446744073709551001 and 18446744073709551002; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a = 18446744073709551000; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a = 18446744073709551613; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a = 18446744073709551614; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables @@ -2833,10 +2857,10 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a=0xFE; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t1 p2 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t2 where a=0xFE; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p2 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t2 p2 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a > 0xFE AND a <= 0xFF; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables @@ -2845,22 +2869,22 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables explain partitions select * from t1 where a >= 0xFE AND a <= 0xFF; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t1 p2 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t2 where a >= 0xFE AND a <= 0xFF; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p2 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t2 p2 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a < 64 AND a >= 63; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t2 where a < 64 AND a >= 63; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p0 ALL NULL NULL NULL NULL 4 Using where +1 SIMPLE t2 p0 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a <= 64 AND a >= 63; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 4 Using where explain partitions select * from t2 where a <= 64 AND a >= 63; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p0,p1 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t2 p0,p1 ALL NULL NULL NULL NULL 4 Using where drop table t1; drop table t2; create table t1(a bigint unsigned not null) partition by range(a+0) ( diff --git a/mysql-test/r/partition_range.result b/mysql-test/r/partition_range.result index 7a3ff4861cc..58945b563dc 100644 --- a/mysql-test/r/partition_range.result +++ b/mysql-test/r/partition_range.result @@ -73,13 +73,13 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pnull system NULL NULL NULL NULL 1 explain partitions select * from t1 where a >= 0; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t1 p0,p1 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a < 0; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables explain partitions select * from t1 where a <= 0; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pnull,p0 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t1 pnull,p0 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a > 1; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables @@ -112,16 +112,16 @@ select * from t1 where a > 1; a b explain partitions select * from t1 where a is null; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a >= 0; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0_p0sp0,p0_p0sp1,p1_p1sp0,p1_p1sp1 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t1 p0_p0sp0,p0_p0sp1,p1_p1sp0,p1_p1sp1 ALL NULL NULL NULL NULL 4 Using where explain partitions select * from t1 where a < 0; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1 ALL NULL NULL NULL NULL 2 Using where explain partitions select * from t1 where a <= 0; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1,p0_p0sp0,p0_p0sp1 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t1 pnull_pnullsp0,pnull_pnullsp1,p0_p0sp0,p0_p0sp1 ALL NULL NULL NULL NULL 4 Using where explain partitions select * from t1 where a > 1; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables diff --git a/mysql-test/suite/parts/r/partition_alter3_innodb.result b/mysql-test/suite/parts/r/partition_alter3_innodb.result index cb104d4be54..7825a2350b0 100644 --- a/mysql-test/suite/parts/r/partition_alter3_innodb.result +++ b/mysql-test/suite/parts/r/partition_alter3_innodb.result @@ -141,7 +141,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 7 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -165,7 +165,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 5 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -190,7 +190,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 3 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -226,7 +226,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 3 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -248,7 +248,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 4 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -269,7 +269,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 4 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -289,7 +289,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 5 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -308,7 +308,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 7 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -326,7 +326,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 10 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -452,7 +452,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 7 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -476,7 +476,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 5 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -504,7 +504,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 3 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -538,7 +538,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 4 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -563,7 +563,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 3 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -587,7 +587,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 23 Using where +1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 10 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -610,7 +610,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 5 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -632,7 +632,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 7 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -653,7 +653,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 10 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 diff --git a/mysql-test/suite/parts/r/partition_alter3_myisam.result b/mysql-test/suite/parts/r/partition_alter3_myisam.result index 374b108b57e..a5dec48e85c 100644 --- a/mysql-test/suite/parts/r/partition_alter3_myisam.result +++ b/mysql-test/suite/parts/r/partition_alter3_myisam.result @@ -155,7 +155,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 7 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -187,7 +187,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 5 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -228,7 +228,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 3 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -278,7 +278,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 3 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -312,7 +312,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 4 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -343,7 +343,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 4 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -371,7 +371,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 5 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -396,7 +396,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part1 ALL NULL NULL NULL NULL 7 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -418,7 +418,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) FROM t1 WHERE f_date = '1000-02-10'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 10 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -552,7 +552,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 7 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -584,7 +584,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 5 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -628,7 +628,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p6 ALL NULL NULL NULL NULL 3 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -676,7 +676,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 4 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -713,7 +713,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 3 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -747,7 +747,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p4 ALL NULL NULL NULL NULL 10 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -778,7 +778,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 5 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -806,7 +806,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 part7 ALL NULL NULL NULL NULL 7 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 @@ -831,7 +831,7 @@ t1.frm t1.par EXPLAIN PARTITIONS SELECT COUNT(*) <> 1 FROM t1 WHERE f_int1 = 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 20 Using where +1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 10 Using where # check read single success: 1 # check read all success: 1 # check read row by row success: 1 diff --git a/mysql-test/t/partition_pruning.test b/mysql-test/t/partition_pruning.test index 358832496e5..db544d4643f 100644 --- a/mysql-test/t/partition_pruning.test +++ b/mysql-test/t/partition_pruning.test @@ -8,6 +8,30 @@ drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9; --enable_warnings +--echo # +--echo # Bug#53806: Wrong estimates for range query in partitioned MyISAM table +--echo # Bug#46754: 'rows' field doesn't reflect partition pruning +--echo # +CREATE TABLE t1 (a INT PRIMARY KEY) +PARTITION BY RANGE (a) ( +PARTITION p0 VALUES LESS THAN (1), +PARTITION p1 VALUES LESS THAN (2), +PARTITION p2 VALUES LESS THAN (3), +PARTITION p3 VALUES LESS THAN (4), +PARTITION p4 VALUES LESS THAN (5), +PARTITION p5 VALUES LESS THAN (6), +PARTITION max VALUES LESS THAN MAXVALUE); + +INSERT INTO t1 VALUES (-1),(0),(1),(2),(3),(4),(5),(6),(7),(8); + +--replace_column 1 # 2 # 3 # 4 # 5 # 6 # 7 # 8 # 9 # 11 # +EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 1; +--replace_column 1 # 2 # 3 # 4 # 5 # 6 # 7 # 8 # 9 # 11 # +EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < 7; +--replace_column 1 # 2 # 3 # 4 # 5 # 6 # 7 # 8 # 9 # 11 # +EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 1; +DROP TABLE t1; + --echo # --echo # Bug#49742: Partition Pruning not working correctly for RANGE --echo # diff --git a/sql/sql_select.cc b/sql/sql_select.cc index f550f75c8b8..02f2fc6bc9e 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -16662,7 +16662,15 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, if (tab->select && tab->select->quick) examined_rows= tab->select->quick->records; else if (tab->type == JT_NEXT || tab->type == JT_ALL) - examined_rows= tab->limit ? tab->limit : tab->table->file->records(); + { + if (tab->limit) + examined_rows= tab->limit; + else + { + tab->table->file->info(HA_STATUS_VARIABLE); + examined_rows= tab->table->file->stats.records; + } + } else examined_rows=(ha_rows)join->best_positions[i].records_read;