drop table if exists t1,t2,t3,t4;
create table t1 (a int not null,b int not null,c int not null, primary key(a,b))
partition by list (b*a)
(partition x1 values in (1),
partition x2 values in (3, 11, 5, 7),
partition x3 values in (16, 8, 5+19, 70-43));
select * from information_schema.partitions where table_schema="test"
and table_name="t1";
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	PARTITION_NAME	SUBPARTITION_NAME	PARTITION_ORDINAL_POSITION	SUBPARTITION_ORDINAL_POSITION	PARTITION_METHOD	SUBPARTITION_METHOD	PARTITION_EXPRESSION	SUBPARTITION_EXPRESSION	PARTITION_DESCRIPTION	TABLE_ROWS	AVG_ROW_LENGTH	DATA_LENGTH	MAX_DATA_LENGTH	INDEX_LENGTH	DATA_FREE	CREATE_TIME	UPDATE_TIME	CHECK_TIME	CHECKSUM	PARTITION_COMMENT	NODEGROUP	TABLESPACE_NAME
def	test	t1	x1	NULL	1	NULL	LIST	NULL	(`b` * `a`)	NULL	1	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t1	x2	NULL	2	NULL	LIST	NULL	(`b` * `a`)	NULL	3,11,5,7	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t1	x3	NULL	3	NULL	LIST	NULL	(`b` * `a`)	NULL	16,8,24,27	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
create table t2 (a int not null,b int not null,c int not null, primary key(a,b))
partition by range (a)
partitions 3
(partition x1 values less than (5),
partition x2 values less than (10),
partition x3 values less than maxvalue);
select * from information_schema.partitions where table_schema="test"
and table_name="t2";
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	PARTITION_NAME	SUBPARTITION_NAME	PARTITION_ORDINAL_POSITION	SUBPARTITION_ORDINAL_POSITION	PARTITION_METHOD	SUBPARTITION_METHOD	PARTITION_EXPRESSION	SUBPARTITION_EXPRESSION	PARTITION_DESCRIPTION	TABLE_ROWS	AVG_ROW_LENGTH	DATA_LENGTH	MAX_DATA_LENGTH	INDEX_LENGTH	DATA_FREE	CREATE_TIME	UPDATE_TIME	CHECK_TIME	CHECKSUM	PARTITION_COMMENT	NODEGROUP	TABLESPACE_NAME
def	test	t2	x1	NULL	1	NULL	RANGE	NULL	`a`	NULL	5	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t2	x2	NULL	2	NULL	RANGE	NULL	`a`	NULL	10	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t2	x3	NULL	3	NULL	RANGE	NULL	`a`	NULL	MAXVALUE	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
create table t3 (f1 date)
partition by hash(month(f1))
partitions 3;
select * from information_schema.partitions where table_schema="test"
and table_name="t3";
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	PARTITION_NAME	SUBPARTITION_NAME	PARTITION_ORDINAL_POSITION	SUBPARTITION_ORDINAL_POSITION	PARTITION_METHOD	SUBPARTITION_METHOD	PARTITION_EXPRESSION	SUBPARTITION_EXPRESSION	PARTITION_DESCRIPTION	TABLE_ROWS	AVG_ROW_LENGTH	DATA_LENGTH	MAX_DATA_LENGTH	INDEX_LENGTH	DATA_FREE	CREATE_TIME	UPDATE_TIME	CHECK_TIME	CHECKSUM	PARTITION_COMMENT	NODEGROUP	TABLESPACE_NAME
def	test	t3	p0	NULL	1	NULL	HASH	NULL	month(`f1`)	NULL	NULL	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t3	p1	NULL	2	NULL	HASH	NULL	month(`f1`)	NULL	NULL	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t3	p2	NULL	3	NULL	HASH	NULL	month(`f1`)	NULL	NULL	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
create table t4 (f1 date, f2 int)
partition by key(f1,f2)
partitions 3;
select * from information_schema.partitions where table_schema="test"
and table_name="t4";
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	PARTITION_NAME	SUBPARTITION_NAME	PARTITION_ORDINAL_POSITION	SUBPARTITION_ORDINAL_POSITION	PARTITION_METHOD	SUBPARTITION_METHOD	PARTITION_EXPRESSION	SUBPARTITION_EXPRESSION	PARTITION_DESCRIPTION	TABLE_ROWS	AVG_ROW_LENGTH	DATA_LENGTH	MAX_DATA_LENGTH	INDEX_LENGTH	DATA_FREE	CREATE_TIME	UPDATE_TIME	CHECK_TIME	CHECKSUM	PARTITION_COMMENT	NODEGROUP	TABLESPACE_NAME
def	test	t4	p0	NULL	1	NULL	KEY	NULL	`f1`,`f2`	NULL	NULL	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t4	p1	NULL	2	NULL	KEY	NULL	`f1`,`f2`	NULL	NULL	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t4	p2	NULL	3	NULL	KEY	NULL	`f1`,`f2`	NULL	NULL	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
drop table t1,t2,t3,t4;
create table t1 (a int not null,b int not null,c int not null,primary key (a,b))
partition by range (a)
subpartition by hash (a+b)
( partition x1 values less than (1)
( subpartition x11,
subpartition x12),
partition x2 values less than (5)
( subpartition x21,
subpartition x22)
);
create table t2 (a int not null,b int not null,c int not null,primary key (a,b))
partition by range (a)
subpartition by key (a)
( partition x1 values less than (1)
( subpartition x11,
subpartition x12),
partition x2 values less than (5)
( subpartition x21,
subpartition x22)
);
select * from information_schema.partitions where table_schema="test";
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	PARTITION_NAME	SUBPARTITION_NAME	PARTITION_ORDINAL_POSITION	SUBPARTITION_ORDINAL_POSITION	PARTITION_METHOD	SUBPARTITION_METHOD	PARTITION_EXPRESSION	SUBPARTITION_EXPRESSION	PARTITION_DESCRIPTION	TABLE_ROWS	AVG_ROW_LENGTH	DATA_LENGTH	MAX_DATA_LENGTH	INDEX_LENGTH	DATA_FREE	CREATE_TIME	UPDATE_TIME	CHECK_TIME	CHECKSUM	PARTITION_COMMENT	NODEGROUP	TABLESPACE_NAME
def	test	t1	x1	x11	1	1	RANGE	HASH	`a`	(`a` + `b`)	1	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t1	x1	x12	1	2	RANGE	HASH	`a`	(`a` + `b`)	1	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t1	x2	x21	2	1	RANGE	HASH	`a`	(`a` + `b`)	5	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t1	x2	x22	2	2	RANGE	HASH	`a`	(`a` + `b`)	5	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t2	x1	x11	1	1	RANGE	KEY	`a`	`a`	1	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t2	x1	x12	1	2	RANGE	KEY	`a`	`a`	1	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t2	x2	x21	2	1	RANGE	KEY	`a`	`a`	5	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t2	x2	x22	2	2	RANGE	KEY	`a`	`a`	5	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
drop table t1,t2;
create table t1 (
a int not null,
b int not null,
c int not null,
primary key (a,b))
partition by range (a)
subpartition by hash (a+b)
( partition x1 values less than (1)
( subpartition x11 nodegroup 0,
subpartition x12 nodegroup 1),
partition x2 values less than (5)
( subpartition x21 nodegroup 0,
subpartition x22 nodegroup 1),
partition x3 values less than (10)
( subpartition x31 max_rows=50,
subpartition x32 nodegroup 1)
);
select * from information_schema.partitions where table_schema="test";
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	PARTITION_NAME	SUBPARTITION_NAME	PARTITION_ORDINAL_POSITION	SUBPARTITION_ORDINAL_POSITION	PARTITION_METHOD	SUBPARTITION_METHOD	PARTITION_EXPRESSION	SUBPARTITION_EXPRESSION	PARTITION_DESCRIPTION	TABLE_ROWS	AVG_ROW_LENGTH	DATA_LENGTH	MAX_DATA_LENGTH	INDEX_LENGTH	DATA_FREE	CREATE_TIME	UPDATE_TIME	CHECK_TIME	CHECKSUM	PARTITION_COMMENT	NODEGROUP	TABLESPACE_NAME
def	test	t1	x1	x11	1	1	RANGE	HASH	`a`	(`a` + `b`)	1	0	0	16384	#	0	0	#	#	NULL	NULL		0	NULL
def	test	t1	x1	x12	1	2	RANGE	HASH	`a`	(`a` + `b`)	1	0	0	16384	#	0	0	#	#	NULL	NULL		1	NULL
def	test	t1	x2	x21	2	1	RANGE	HASH	`a`	(`a` + `b`)	5	0	0	16384	#	0	0	#	#	NULL	NULL		0	NULL
def	test	t1	x2	x22	2	2	RANGE	HASH	`a`	(`a` + `b`)	5	0	0	16384	#	0	0	#	#	NULL	NULL		1	NULL
def	test	t1	x3	x31	3	1	RANGE	HASH	`a`	(`a` + `b`)	10	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t1	x3	x32	3	2	RANGE	HASH	`a`	(`a` + `b`)	10	0	0	16384	#	0	0	#	#	NULL	NULL		1	NULL
show tables;
Tables_in_test
t1
drop table t1;
create table t1(f1 int, f2 int);
select * from information_schema.partitions where table_schema="test";
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	PARTITION_NAME	SUBPARTITION_NAME	PARTITION_ORDINAL_POSITION	SUBPARTITION_ORDINAL_POSITION	PARTITION_METHOD	SUBPARTITION_METHOD	PARTITION_EXPRESSION	SUBPARTITION_EXPRESSION	PARTITION_DESCRIPTION	TABLE_ROWS	AVG_ROW_LENGTH	DATA_LENGTH	MAX_DATA_LENGTH	INDEX_LENGTH	DATA_FREE	CREATE_TIME	UPDATE_TIME	CHECK_TIME	CHECKSUM	PARTITION_COMMENT	NODEGROUP	TABLESPACE_NAME
def	test	t1	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	0	0	16384	#	0	0	#	#	NULL	NULL			NULL
drop table t1;
create table t1 (f1 date)
partition by linear hash(month(f1))
partitions 3;
select * from information_schema.partitions where table_schema="test"
and table_name="t1";
TABLE_CATALOG	TABLE_SCHEMA	TABLE_NAME	PARTITION_NAME	SUBPARTITION_NAME	PARTITION_ORDINAL_POSITION	SUBPARTITION_ORDINAL_POSITION	PARTITION_METHOD	SUBPARTITION_METHOD	PARTITION_EXPRESSION	SUBPARTITION_EXPRESSION	PARTITION_DESCRIPTION	TABLE_ROWS	AVG_ROW_LENGTH	DATA_LENGTH	MAX_DATA_LENGTH	INDEX_LENGTH	DATA_FREE	CREATE_TIME	UPDATE_TIME	CHECK_TIME	CHECKSUM	PARTITION_COMMENT	NODEGROUP	TABLESPACE_NAME
def	test	t1	p0	NULL	1	NULL	LINEAR HASH	NULL	month(`f1`)	NULL	NULL	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t1	p1	NULL	2	NULL	LINEAR HASH	NULL	month(`f1`)	NULL	NULL	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
def	test	t1	p2	NULL	3	NULL	LINEAR HASH	NULL	month(`f1`)	NULL	NULL	0	0	16384	#	0	0	#	#	NULL	NULL		default	NULL
drop table t1;
create table t1 (a int)
PARTITION BY RANGE (a)
SUBPARTITION BY LINEAR HASH (a)
(PARTITION p0 VALUES LESS THAN (10));
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
/*!50100 PARTITION BY RANGE (`a`)
SUBPARTITION BY LINEAR HASH (`a`)
(PARTITION p0 VALUES LESS THAN (10) ENGINE = InnoDB) */
select SUBPARTITION_METHOD FROM information_schema.partitions WHERE
table_schema="test" AND table_name="t1";
SUBPARTITION_METHOD
LINEAR HASH
drop table t1;
create table t1 (a int)
PARTITION BY LIST (a)
(PARTITION p0 VALUES IN
(10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,
32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53));
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
/*!50100 PARTITION BY LIST (`a`)
(PARTITION p0 VALUES IN (10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53) ENGINE = InnoDB) */
SELECT PARTITION_DESCRIPTION FROM information_schema.partitions WHERE
table_schema = "test" AND table_name = "t1";
PARTITION_DESCRIPTION
10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53
drop table t1;
drop table if exists t1;
create table t1 (f1 int key) partition by key(f1) partitions 2;
select create_options from information_schema.tables where table_schema="test";
CREATE_OPTIONS
partitioned
drop table t1;
# Bug #29870919  INFORMATION SCHEMA STATS EXPIRY RESULTS IN BAD
# STATS FOR PARTITIONED TABLES
#
# Without the fix the cardinality values by SHOW INDEXES is invalid.
#
CREATE TABLE t1
(f1 INT NOT NULL AUTO_INCREMENT,
f2 INT NOT NULL,
PRIMARY KEY (f1,f2)) ENGINE=InnoDB
PARTITION BY RANGE (f2)
(PARTITION p0 VALUES LESS THAN (100),
PARTITION p1 VALUES LESS THAN (200),
PARTITION p2 VALUES LESS THAN (300),
PARTITION p3 VALUES LESS THAN (MAXVALUE));
INSERT INTO t1 VALUES (NULL, 1);
INSERT INTO t1 VALUES (NULL, 2);
INSERT INTO t1 SELECT NULL, 3
FROM t1 a, t1 b, t1 c, t1 d, t1 e, t1 f, t1 g;
# This SELECT caches the cardinality, as there is non cached yet.
SHOW INDEXES IN t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	PRIMARY	1	f1	A	130	NULL	NULL		BTREE			YES	NULL
t1	0	PRIMARY	2	f2	A	130	NULL	NULL		BTREE			YES	NULL
# We do not account INSERTed rows into cardinality
# because the cached value is not expired yet.
INSERT INTO t1 SELECT NULL, 4 FROM t1;
SHOW INDEXES IN t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	PRIMARY	1	f1	A	130	NULL	NULL		BTREE			YES	NULL
t1	0	PRIMARY	2	f2	A	130	NULL	NULL		BTREE			YES	NULL
# We force update cache by calling ANALYZE TABLE.
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	OK
SHOW INDEXES IN t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	PRIMARY	1	f1	A	260	NULL	NULL		BTREE			YES	NULL
t1	0	PRIMARY	2	f2	A	260	NULL	NULL		BTREE			YES	NULL
# We do see INSERTed rows accounted into cardinality
# because we ignore cache with expiry seconds set to 0.
SET session information_schema_stats_expiry = 0;
INSERT INTO t1 SELECT NULL, 4 FROM t1;
SHOW INDEXES IN t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Visible	Expression
t1	0	PRIMARY	1	f1	A	520	NULL	NULL		BTREE			YES	NULL
t1	0	PRIMARY	2	f2	A	520	NULL	NULL		BTREE			YES	NULL
DROP TABLE t1;