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Manual merge between bug#46362 and bug#20577.

Browse source 
sql/opt_range.cc:
  Removed duplicate code (if statement must have been duplicated during earlier merge).
sql/sql_partition.cc:
  After mergeing bug#46362 and bug#20577, the NULL partition was also searched
  when col = const, fixed by checking if = or range.
This commit is contained in:
Mattias Jonsson 2009-08-28 12:55:59 +02:00
commit 0a76397171
8 changed files with 1231 additions and 34 deletions
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849
mysql-test/r/partition_pruning.result
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@ -109,6 +109,63 @@ a
0001-01-01
1001-00-00
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 range a a 4 NULL 3 Using where; Using index
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 range a a 4 NULL 3 Using where; Using index
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 range a a 4 NULL 4 Using where; Using index
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 range a a 4 NULL 3 Using where; Using index
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 a 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 range a a 4 NULL 3 Using where; Using index
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 range a a 4 NULL 3 Using where; Using index
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 range a a 4 NULL 4 Using where; Using index
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 range a a 4 NULL 4 Using where; Using index
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 ref a a 4 const 1 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,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,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 range a a 4 NULL 2 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 range a a 4 NULL 2 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
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 range a a 4 NULL 5 Using where; Using index
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 range a a 4 NULL 3 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,p2001-01-01 range a a 4 NULL 3 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 pNULL,p0001-01-01,p1001-01-01 range a a 4 NULL 3 Using where; Using index
# test without index
ALTER TABLE t1 DROP KEY a;
SELECT * FROM t1 WHERE a < '1001-01-01';
@ -210,6 +267,63 @@ a
0001-01-01
1001-00-00
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
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
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
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
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
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
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
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
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
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,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,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
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
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
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
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
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
DROP TABLE t1;
# test of LIST and index
CREATE TABLE t1 (a DATE, KEY(a))
@ -322,6 +436,63 @@ a
0001-01-01
1001-00-00
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 range a a 4 NULL 3 Using where; Using index
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 range a a 4 NULL 4 Using where; Using index
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 range a a 4 NULL 4 Using where; Using index
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 range a a 4 NULL 3 Using where; Using index
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 a 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 range a a 4 NULL 3 Using where; Using index
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 range a a 4 NULL 3 Using where; Using index
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 range a a 4 NULL 4 Using where; Using index
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 range a a 4 NULL 4 Using where; Using index
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 ref a a 4 const 1 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 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 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 range a a 4 NULL 2 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 range a a 4 NULL 2 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
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 range a a 4 NULL 5 Using where; Using index
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 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 range a a 4 NULL 2 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
# test without index
ALTER TABLE t1 DROP KEY a;
SELECT * FROM t1 WHERE a < '1001-01-01';
@ -423,6 +594,684 @@ a
0001-01-01
1001-00-00
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
DROP TABLE t1;
# Test with DATETIME column NOT NULL
CREATE TABLE t1 (
a int(10) unsigned NOT NULL,
b DATETIME NOT NULL,
PRIMARY KEY (a, b)
) PARTITION BY RANGE (TO_DAYS(b))
(PARTITION p20090401 VALUES LESS THAN (TO_DAYS('2009-04-02')),
PARTITION p20090402 VALUES LESS THAN (TO_DAYS('2009-04-03')),
PARTITION p20090403 VALUES LESS THAN (TO_DAYS('2009-04-04')),
PARTITION p20090404 VALUES LESS THAN (TO_DAYS('2009-04-05')),
PARTITION p20090405 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1, '2009-01-01'), (1, '2009-04-01'), (2, '2009-04-01'),
(1, '2009-04-02'), (2, '2009-04-02'), (1, '2009-04-02 23:59:59'),
(1, '2009-04-03'), (2, '2009-04-03'), (1, '2009-04-04'), (2, '2009-04-04'),
(1, '2009-04-05'), (1, '2009-04-06'), (1, '2009-04-07');
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,p20090402 index NULL PRIMARY 12 NULL 6 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,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
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
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
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
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
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
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,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 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 12 NULL 13 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 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,p20090403,p20090404,p20090405 index NULL PRIMARY 12 NULL 13 Using where; Using index
DROP TABLE t1;
# Test with DATE column NOT NULL
CREATE TABLE t1 (
a int(10) unsigned NOT NULL,
b DATE NOT NULL,
PRIMARY KEY (a, b)
) PARTITION BY RANGE (TO_DAYS(b))
(PARTITION p20090401 VALUES LESS THAN (TO_DAYS('2009-04-02')),
PARTITION p20090402 VALUES LESS THAN (TO_DAYS('2009-04-03')),
PARTITION p20090403 VALUES LESS THAN (TO_DAYS('2009-04-04')),
PARTITION p20090404 VALUES LESS THAN (TO_DAYS('2009-04-05')),
PARTITION p20090405 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1, '2009-01-01'), (1, '2009-04-01'), (2, '2009-04-01'),
(1, '2009-04-02'), (2, '2009-04-02'), (1, '2009-04-03'), (2, '2009-04-03'),
(1, '2009-04-04'), (2, '2009-04-04'), (1, '2009-04-05'), (1, '2009-04-06'),
(1, '2009-04-07');
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,p20090402 index NULL PRIMARY 7 NULL 5 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,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
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
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
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
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
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 NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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 NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
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
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
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
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
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 NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
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
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
DROP TABLE t1;
# Test with DATETIME column NULL
CREATE TABLE t1 (
a int(10) unsigned NOT NULL,
b DATETIME NULL
) PARTITION BY RANGE (TO_DAYS(b))
(PARTITION p20090401 VALUES LESS THAN (TO_DAYS('2009-04-02')),
PARTITION p20090402 VALUES LESS THAN (TO_DAYS('2009-04-03')),
PARTITION p20090403 VALUES LESS THAN (TO_DAYS('2009-04-04')),
PARTITION p20090404 VALUES LESS THAN (TO_DAYS('2009-04-05')),
PARTITION p20090405 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1, '2009-01-01'), (1, '2009-04-01'), (2, '2009-04-01'),
(1, '2009-04-02'), (2, '2009-04-02'), (1, '2009-04-02 23:59:59'),
(1, '2009-04-03'), (2, '2009-04-03'), (1, '2009-04-04'), (2, '2009-04-04'),
(1, '2009-04-05'), (1, '2009-04-06'), (1, '2009-04-07');
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,p20090402 ALL NULL NULL NULL NULL 6 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,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
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
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
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
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
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
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,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 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 13 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 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,p20090403,p20090404,p20090405 ALL NULL NULL NULL NULL 13 Using where
DROP TABLE t1;
# Test with DATE column NULL
CREATE TABLE t1 (
a int(10) unsigned NOT NULL,
b DATE NULL
) PARTITION BY RANGE (TO_DAYS(b))
(PARTITION p20090401 VALUES LESS THAN (TO_DAYS('2009-04-02')),
PARTITION p20090402 VALUES LESS THAN (TO_DAYS('2009-04-03')),
PARTITION p20090403 VALUES LESS THAN (TO_DAYS('2009-04-04')),
PARTITION p20090404 VALUES LESS THAN (TO_DAYS('2009-04-05')),
PARTITION p20090405 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1, '2009-01-01'), (1, '2009-04-01'), (2, '2009-04-01'),
(1, '2009-04-02'), (2, '2009-04-02'), (1, '2009-04-03'), (2, '2009-04-03'),
(1, '2009-04-04'), (2, '2009-04-04'), (1, '2009-04-05'), (1, '2009-04-06'),
(1, '2009-04-07');
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,p20090402 ALL NULL NULL NULL NULL 5 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,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
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
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
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
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
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 NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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 NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
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
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
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
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
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 NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
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
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
DROP TABLE t1;
# For better code coverage of the patch
CREATE TABLE t1 (
a int(10) unsigned NOT NULL,
b DATE
) PARTITION BY RANGE ( TO_DAYS(b) )
(PARTITION p20090401 VALUES LESS THAN (TO_DAYS('2009-04-02')),
PARTITION p20090402 VALUES LESS THAN (TO_DAYS('2009-04-03')),
PARTITION p20090403 VALUES LESS THAN (TO_DAYS('2009-04-04')),
PARTITION p20090404 VALUES LESS THAN (TO_DAYS('2009-04-05')),
PARTITION p20090405 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1, '2009-01-01'), (2, NULL);
# test with an invalid date, which lead to item->null_value is set.
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-99' AS DATETIME);
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p20090401 ALL NULL NULL NULL NULL 2 Using where
Warnings:
Warning 1292 Incorrect datetime value: '2009-04-99'
Warning 1292 Incorrect datetime value: '2009-04-99'
DROP TABLE t1;
CREATE TABLE t1
(a INT NOT NULL AUTO_INCREMENT,

307
mysql-test/t/partition_pruning.test
View file

@ -52,6 +52,313 @@ ALTER TABLE t1 DROP KEY a;
--source include/partition_date_range.inc
DROP TABLE t1;
#
# Bug#46362: Endpoint should be set to false for TO_DAYS(DATE)
# There is a problem when comparing DATE with DATETIME.
# In pruning it is converted into the field type
# and in row evaluation it is converted to longlong
# (like a DATETIME).
--echo # Test with DATETIME column NOT NULL
CREATE TABLE t1 (
a int(10) unsigned NOT NULL,
b DATETIME NOT NULL,
PRIMARY KEY (a, b)
) PARTITION BY RANGE (TO_DAYS(b))
(PARTITION p20090401 VALUES LESS THAN (TO_DAYS('2009-04-02')),
PARTITION p20090402 VALUES LESS THAN (TO_DAYS('2009-04-03')),
PARTITION p20090403 VALUES LESS THAN (TO_DAYS('2009-04-04')),
PARTITION p20090404 VALUES LESS THAN (TO_DAYS('2009-04-05')),
PARTITION p20090405 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1, '2009-01-01'), (1, '2009-04-01'), (2, '2009-04-01'),
(1, '2009-04-02'), (2, '2009-04-02'), (1, '2009-04-02 23:59:59'),
(1, '2009-04-03'), (2, '2009-04-03'), (1, '2009-04-04'), (2, '2009-04-04'),
(1, '2009-04-05'), (1, '2009-04-06'), (1, '2009-04-07');
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-02 23:59:58' AS DATETIME);
DROP TABLE t1;
--echo # Test with DATE column NOT NULL
CREATE TABLE t1 (
a int(10) unsigned NOT NULL,
b DATE NOT NULL,
PRIMARY KEY (a, b)
) PARTITION BY RANGE (TO_DAYS(b))
(PARTITION p20090401 VALUES LESS THAN (TO_DAYS('2009-04-02')),
PARTITION p20090402 VALUES LESS THAN (TO_DAYS('2009-04-03')),
PARTITION p20090403 VALUES LESS THAN (TO_DAYS('2009-04-04')),
PARTITION p20090404 VALUES LESS THAN (TO_DAYS('2009-04-05')),
PARTITION p20090405 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1, '2009-01-01'), (1, '2009-04-01'), (2, '2009-04-01'),
(1, '2009-04-02'), (2, '2009-04-02'), (1, '2009-04-03'), (2, '2009-04-03'),
(1, '2009-04-04'), (2, '2009-04-04'), (1, '2009-04-05'), (1, '2009-04-06'),
(1, '2009-04-07');
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-02 23:59:58' AS DATETIME);
DROP TABLE t1;
--echo # Test with DATETIME column NULL
CREATE TABLE t1 (
a int(10) unsigned NOT NULL,
b DATETIME NULL
) PARTITION BY RANGE (TO_DAYS(b))
(PARTITION p20090401 VALUES LESS THAN (TO_DAYS('2009-04-02')),
PARTITION p20090402 VALUES LESS THAN (TO_DAYS('2009-04-03')),
PARTITION p20090403 VALUES LESS THAN (TO_DAYS('2009-04-04')),
PARTITION p20090404 VALUES LESS THAN (TO_DAYS('2009-04-05')),
PARTITION p20090405 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1, '2009-01-01'), (1, '2009-04-01'), (2, '2009-04-01'),
(1, '2009-04-02'), (2, '2009-04-02'), (1, '2009-04-02 23:59:59'),
(1, '2009-04-03'), (2, '2009-04-03'), (1, '2009-04-04'), (2, '2009-04-04'),
(1, '2009-04-05'), (1, '2009-04-06'), (1, '2009-04-07');
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-02 23:59:58' AS DATETIME);
DROP TABLE t1;
--echo # Test with DATE column NULL
CREATE TABLE t1 (
a int(10) unsigned NOT NULL,
b DATE NULL
) PARTITION BY RANGE (TO_DAYS(b))
(PARTITION p20090401 VALUES LESS THAN (TO_DAYS('2009-04-02')),
PARTITION p20090402 VALUES LESS THAN (TO_DAYS('2009-04-03')),
PARTITION p20090403 VALUES LESS THAN (TO_DAYS('2009-04-04')),
PARTITION p20090404 VALUES LESS THAN (TO_DAYS('2009-04-05')),
PARTITION p20090405 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1, '2009-01-01'), (1, '2009-04-01'), (2, '2009-04-01'),
(1, '2009-04-02'), (2, '2009-04-02'), (1, '2009-04-03'), (2, '2009-04-03'),
(1, '2009-04-04'), (2, '2009-04-04'), (1, '2009-04-05'), (1, '2009-04-06'),
(1, '2009-04-07');
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-02 23:59:59' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > CAST('2009-04-03' AS DATE);
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03 00:00:00';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-02 23:59:59';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b <= '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b = '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b >= '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b > '2009-04-03';
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-03 00:00:01' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b < CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b <= CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b = CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b >= CAST('2009-04-02 23:59:58' AS DATETIME);
EXPLAIN PARTITIONS SELECT * FROM t1
WHERE b > CAST('2009-04-02 23:59:58' AS DATETIME);
DROP TABLE t1;
--echo # For better code coverage of the patch
CREATE TABLE t1 (
a int(10) unsigned NOT NULL,
b DATE
) PARTITION BY RANGE ( TO_DAYS(b) )
(PARTITION p20090401 VALUES LESS THAN (TO_DAYS('2009-04-02')),
PARTITION p20090402 VALUES LESS THAN (TO_DAYS('2009-04-03')),
PARTITION p20090403 VALUES LESS THAN (TO_DAYS('2009-04-04')),
PARTITION p20090404 VALUES LESS THAN (TO_DAYS('2009-04-05')),
PARTITION p20090405 VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1, '2009-01-01'), (2, NULL);
--echo # test with an invalid date, which lead to item->null_value is set.
EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b < CAST('2009-04-99' AS DATETIME);
DROP TABLE t1;
#
# Bug#40972: some sql execution lead the whole database crashing
#

4
sql-common/my_time.c
View file

@ -450,9 +450,7 @@ str_to_datetime(const char *str, uint length, MYSQL_TIME *l_time,
}
}
DBUG_RETURN(l_time->time_type=
(number_of_fields <= 3 ? MYSQL_TIMESTAMP_DATE :
MYSQL_TIMESTAMP_DATETIME));
DBUG_RETURN(l_time->time_type);
err:
bzero((char*) l_time, sizeof(*l_time));

50
sql/item.cc
View file

@ -6853,14 +6853,21 @@ void resolve_const_item(THD *thd, Item **ref, Item *comp_item)
}
/**
Return true if the value stored in the field is equal to the const
item.
Compare the value stored in field, with the original item.
We need to use this on the range optimizer because in some cases
we can't store the value in the field without some precision/character loss.
@param field field which the item is converted and stored in
@param item original item
@return Return an integer greater than, equal to, or less than 0 if
the value stored in the field is greater than, equal to,
or less than the original item
@note We only use this on the range optimizer/partition pruning,
because in some cases we can't store the value in the field
without some precision/character loss.
*/
bool field_is_equal_to_item(Field *field,Item *item)
int stored_field_cmp_to_item(Field *field, Item *item)
{
Item_result res_type=item_cmp_type(field->result_type(),
@ -6871,28 +6878,49 @@ bool field_is_equal_to_item(Field *field,Item *item)
char field_buff[MAX_FIELD_WIDTH];
String item_tmp(item_buff,sizeof(item_buff),&my_charset_bin),*item_result;
String field_tmp(field_buff,sizeof(field_buff),&my_charset_bin);
enum_field_types field_type;
item_result=item->val_str(&item_tmp);
if (item->null_value)
return 1; // This must be true
return 0;
field->val_str(&field_tmp);
return !stringcmp(&field_tmp,item_result);
/*
If comparing DATE with DATETIME, append the time-part to the DATE.
So that the strings are equally formatted.
A DATE converted to string is 10 characters, and a DATETIME converted
to string is 19 characters.
*/
field_type= field->type();
if (field_type == MYSQL_TYPE_DATE &&
item_result->length() == 19)
field_tmp.append(" 00:00:00");
else if (field_type == MYSQL_TYPE_DATETIME &&
item_result->length() == 10)
item_result->append(" 00:00:00");
return stringcmp(&field_tmp,item_result);
}
if (res_type == INT_RESULT)
return 1; // Both where of type int
return 0; // Both are of type int
if (res_type == DECIMAL_RESULT)
{
my_decimal item_buf, *item_val,
field_buf, *field_val;
item_val= item->val_decimal(&item_buf);
if (item->null_value)
return 1; // This must be true
return 0;
field_val= field->val_decimal(&field_buf);
return !my_decimal_cmp(item_val, field_val);
return my_decimal_cmp(item_val, field_val);
}
double result= item->val_real();
if (item->null_value)
return 0;
double field_result= field->val_real();
if (field_result < result)
return -1;
else if (field_result > result)
return 1;
return result == field->val_real();
return 0;
}
Item_cache* Item_cache::get_cache(const Item *item)

6
sql/item.h
View file

@ -583,8 +583,8 @@ public:
left_endp FALSE <=> The interval is "x < const" or "x <= const"
TRUE <=> The interval is "x > const" or "x >= const"
incl_endp IN TRUE <=> the comparison is '<' or '>'
FALSE <=> the comparison is '<=' or '>='
incl_endp IN FALSE <=> the comparison is '<' or '>'
TRUE <=> the comparison is '<=' or '>='
OUT The same but for the "F(x) $CMP$ F(const)" comparison
DESCRIPTION
@ -3125,4 +3125,4 @@ void mark_select_range_as_dependent(THD *thd,
extern Cached_item *new_Cached_item(THD *thd, Item *item);
extern Item_result item_cmp_type(Item_result a,Item_result b);
extern void resolve_const_item(THD *thd, Item **ref, Item *cmp_item);
extern bool field_is_equal_to_item(Field *field,Item *item);
extern int stored_field_cmp_to_item(Field *field, Item *item);

10
sql/item_timefunc.cc
View file

@ -1006,15 +1006,19 @@ longlong Item_func_to_days::val_int_endpoint(bool left_endp, bool *incl_endp)
point to day bound ("strictly less" comparison stays intact):
col < '2007-09-15 00:00:00' -> TO_DAYS(col) < TO_DAYS('2007-09-15')
col > '2007-09-15 23:59:59' -> TO_DAYS(col) > TO_DAYS('2007-09-15')
which is different from the general case ("strictly less" changes to
"less or equal"):
col < '2007-09-15 12:34:56' -> TO_DAYS(col) <= TO_DAYS('2007-09-15')
*/
if (!left_endp && !(ltime.hour || ltime.minute || ltime.second ||
ltime.second_part))
; /* do nothing */
if ((!left_endp && !(ltime.hour || ltime.minute || ltime.second ||
ltime.second_part)) ||
(left_endp && ltime.hour == 23 && ltime.minute == 59 &&
ltime.second == 59))
/* do nothing */
;
else
*incl_endp= TRUE;
return res;

22
sql/opt_range.cc
View file

@ -5856,7 +5856,7 @@ get_mm_leaf(RANGE_OPT_PARAM *param, COND *conf_func, Field *field,
but we'll need to convert '>' to '>=' and '<' to '<='. This will
be done together with other types at the end of this function
(grep for field_is_equal_to_item)
(grep for stored_field_cmp_to_item)
*/
}
else
@ -5934,7 +5934,7 @@ get_mm_leaf(RANGE_OPT_PARAM *param, COND *conf_func, Field *field,
switch (type) {
case Item_func::LT_FUNC:
if (field_is_equal_to_item(field,value))
if (stored_field_cmp_to_item(field,value) == 0)
tree->max_flag=NEAR_MAX;
/* fall through */
case Item_func::LE_FUNC:
@ -5948,11 +5948,16 @@ get_mm_leaf(RANGE_OPT_PARAM *param, COND *conf_func, Field *field,
break;
case Item_func::GT_FUNC:
/* Don't use open ranges for partial key_segments */
if (field_is_equal_to_item(field,value) &&
!(key_part->flag & HA_PART_KEY_SEG))
if ((!(key_part->flag & HA_PART_KEY_SEG)) &&
(stored_field_cmp_to_item(field, value) <= 0))
tree->min_flag=NEAR_MIN;
/* fall through */
tree->max_flag= NO_MAX_RANGE;
break;
case Item_func::GE_FUNC:
/* Don't use open ranges for partial key_segments */
if ((!(key_part->flag & HA_PART_KEY_SEG)) &&
(stored_field_cmp_to_item(field,value) < 0))
tree->min_flag= NEAR_MIN;
tree->max_flag=NO_MAX_RANGE;
break;
case Item_func::SP_EQUALS_FUNC:
@ -6443,13 +6448,6 @@ key_and(RANGE_OPT_PARAM *param, SEL_ARG *key1, SEL_ARG *key2, uint clone_flag)
return 0; // Can't optimize this
}
if ((key1->min_flag | key2->min_flag) & GEOM_FLAG)
{
key1->free_tree();
key2->free_tree();
return 0; // Can't optimize this
}
key1->use_count--;
key2->use_count--;
SEL_ARG *e1=key1->first(), *e2=key2->first(), *new_tree=0;

17
sql/sql_partition.cc
View file

@ -6730,6 +6730,7 @@ int get_part_iter_for_interval_via_mapping(partition_info *part_info,
Field *field= part_info->part_field_array[0];
uint32 max_endpoint_val;
get_endpoint_func get_endpoint;
bool can_match_multiple_values; /* is not '=' */
uint field_len= field->pack_length_in_rec();
part_iter->ret_null_part= part_iter->ret_null_part_orig= FALSE;
@ -6768,9 +6769,13 @@ int get_part_iter_for_interval_via_mapping(partition_info *part_info,
else
assert(0);
if (part_info->part_type == RANGE_PARTITION ||
part_info->has_null_value)
can_match_multiple_values= (flags || !min_value || !max_value ||
memcmp(min_value, max_value, field_len));
if (can_match_multiple_values &&
(part_info->part_type == RANGE_PARTITION ||
part_info->has_null_value))
{
/* Range scan on RANGE or LIST partitioned table */
enum_monotonicity_info monotonic;
monotonic= part_info->part_expr->get_monotonicity_info();
if (monotonic == MONOTONIC_INCREASING_NOT_NULL ||
@ -6812,6 +6817,14 @@ int get_part_iter_for_interval_via_mapping(partition_info *part_info,
store_key_image_to_rec(field, min_value, field_len);
bool include_endp= !test(flags & NEAR_MIN);
part_iter->part_nums.start= get_endpoint(part_info, 1, include_endp);
if (!can_match_multiple_values && part_info->part_expr->null_value)
{
/* col = x and F(x) = NULL -> only search NULL partition */
part_iter->part_nums.cur= part_iter->part_nums.start= 0;
part_iter->part_nums.end= 0;
part_iter->ret_null_part= part_iter->ret_null_part_orig= TRUE;
return 1;
}
part_iter->part_nums.cur= part_iter->part_nums.start;
if (part_iter->part_nums.start == max_endpoint_val)
return 0; /* No partitions */