Manual merge between bug#46362 and bug#20577.

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.

1 files changed, 849 insertions, 0 deletions

diff --git a/mysql-test/r/partition_pruning.result b/mysql-test/r/partition_pruning.result
index 7ac1e24cfab..86aa89be8a7 100644
--- a/mysql-test/r/partition_pruning.result
+++ b/mysql-test/r/partition_pruning.result
@@ -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,