Edit File: partition_datatype.test
# # Simple test for the partition storage engine # with most datatypes and null / not null # as partition by key # Created to verify the fix for Bug#31705 # Partitions: crash if varchar length > 65530 # BUG#48164 limited size to 3072 bytes # -- source include/have_partition.inc -- source include/have_innodb.inc --disable_warnings drop table if exists t1; --enable_warnings -- echo # test with not null create table t1 (a bit not null) partition by key (a); insert into t1 values (b'1'); select hex(a) from t1 where a = b'1'; drop table t1; create table t1 (a tinyint not null) partition by key (a); insert into t1 values (2); select * from t1 where a = 2; drop table t1; create table t1 (a smallint not null) partition by key (a); insert into t1 values (2); select * from t1 where a = 2; drop table t1; create table t1 (a mediumint not null) partition by key (a); insert into t1 values (2); select * from t1 where a = 2; drop table t1; create table t1 (a int not null) partition by key (a); insert into t1 values (2); select * from t1 where a = 2; drop table t1; create table t1 (a bigint not null) partition by key (a); insert into t1 values (2); select * from t1 where a = 2; drop table t1; create table t1 (a float not null) partition by key (a); insert into t1 values (0.5); select * from t1 where a = 0.5; drop table t1; create table t1 (a double not null) partition by key (a); insert into t1 values (0.5); select * from t1 where a = 0.5; drop table t1; create table t1 (a decimal(4,2) not null) partition by key (a); insert into t1 values (2.1); select * from t1 where a = 2.1; drop table t1; create table t1 (a date not null) partition by key (a); insert into t1 values ('2001-01-01'); select * from t1 where a = '2001-01-01'; drop table t1; create table t1 (a datetime not null) partition by key (a); insert into t1 values ('2001-01-01 01:02:03'); select * from t1 where a = '2001-01-01 01:02:03'; drop table t1; create table t1 (a timestamp not null) partition by key (a); insert into t1 values ('2001-01-01 01:02:03'); select * from t1 where a = '2001-01-01 01:02:03'; drop table t1; create table t1 (a time not null) partition by key (a); insert into t1 values ('01:02:03'); select * from t1 where a = '01:02:03'; drop table t1; create table t1 (a year not null) partition by key (a); insert into t1 values ('2001'); select * from t1 where a = '2001'; drop table t1; create table t1 (a varchar(10) character set utf8 not null) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a varchar(300) character set utf8 not null) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a varchar(10) character set latin1 not null) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a varchar(300) character set latin1 not null) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a char(10) character set utf8 not null) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a char(10) character set latin1 not null) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a enum('y','n') not null) partition by key (a); insert into t1 values ('y'); select * from t1 where a = 'y'; drop table t1; create table t1 (a set('y','n') not null) partition by key (a); insert into t1 values ('y'); select * from t1 where a = 'y'; drop table t1; -- echo # test with null allowed create table t1 (a bit) partition by key (a); insert into t1 values (b'1'); insert into t1 values (NULL); select hex(a) from t1 where a = b'1'; select hex(a) from t1 where a is NULL; select hex(a) from t1 order by a; drop table t1; create table t1 (a tinyint) partition by key (a); insert into t1 values (2); select * from t1 where a = 2; drop table t1; create table t1 (a smallint) partition by key (a); insert into t1 values (2); select * from t1 where a = 2; drop table t1; create table t1 (a mediumint) partition by key (a); insert into t1 values (2); select * from t1 where a = 2; drop table t1; create table t1 (a int) partition by key (a); insert into t1 values (2); select * from t1 where a = 2; drop table t1; create table t1 (a bigint) partition by key (a); insert into t1 values (2); select * from t1 where a = 2; drop table t1; create table t1 (a float) partition by key (a); insert into t1 values (0.5); select * from t1 where a = 0.5; drop table t1; create table t1 (a double) partition by key (a); insert into t1 values (0.5); select * from t1 where a = 0.5; drop table t1; create table t1 (a decimal(4,2)) partition by key (a); insert into t1 values (2.1); select * from t1 where a = 2.1; drop table t1; create table t1 (a date) partition by key (a); insert into t1 values ('2001-01-01'); select * from t1 where a = '2001-01-01'; drop table t1; create table t1 (a datetime) partition by key (a); insert into t1 values ('2001-01-01 01:02:03'); select * from t1 where a = '2001-01-01 01:02:03'; drop table t1; create table t1 (a timestamp null) partition by key (a); insert into t1 values ('2001-01-01 01:02:03'); select * from t1 where a = '2001-01-01 01:02:03'; drop table t1; create table t1 (a time) partition by key (a); insert into t1 values ('01:02:03'); select * from t1 where a = '01:02:03'; drop table t1; create table t1 (a year) partition by key (a); insert into t1 values ('2001'); select * from t1 where a = '2001'; drop table t1; create table t1 (a varchar(10) character set utf8) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a varchar(300) character set utf8) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a varchar(10) character set latin1) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a varchar(300) character set latin1) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a char(10) character set utf8) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a char(10) character set latin1) partition by key (a); insert into t1 values ('abc'); select * from t1 where a = 'abc'; drop table t1; create table t1 (a enum('y','n')) partition by key (a); insert into t1 values ('y'); select * from t1 where a = 'y'; drop table t1; create table t1 (a set('y','n')) partition by key (a); insert into t1 values ('y'); select * from t1 where a = 'y'; drop table t1; create table t1 (a varchar(3068)) partition by key (a); insert into t1 values ('bbbb'); insert into t1 values ('aaaa'); select * from t1 where a = 'aaaa'; select * from t1 where a like 'aaa%'; select * from t1 where a = 'bbbb'; drop table t1; create table t1 (a varchar(3069)) partition by key (a); insert into t1 values ('bbbb'); insert into t1 values ('aaaa'); select * from t1 where a = 'aaaa'; select * from t1 where a like 'aaa%'; select * from t1 where a = 'bbbb'; drop table t1; create table t1 (a varchar(3070) not null) partition by key (a); insert into t1 values ('bbbb'); insert into t1 values ('aaaa'); select * from t1 where a = 'aaaa'; select * from t1 where a like 'aaa%'; select * from t1 where a = 'bbbb'; drop table t1; -- error ER_PARTITION_FIELDS_TOO_LONG create table t1 (a varchar(3070)) partition by key (a); -- error ER_TOO_BIG_ROWSIZE create table t1 (a varchar(65533)) partition by key (a); -- error ER_TOO_BIG_ROWSIZE create table t1 (a varchar(65534) not null) partition by key (a); -- error ER_TOO_BIG_ROWSIZE create table t1 (a varchar(65535)) partition by key (a); # # Bug#34358: error in key_restore for bitfields with uneven bits # create table t1 (a bit(27), primary key (a)) engine=myisam partition by hash (a) (partition p0, partition p1, partition p2); show create table t1; insert into t1 values (1),(4),(7),(10),(13),(16),(19),(22),(25),(28),(31),(34); select hex(a) from t1 where a = 7; drop table t1; --echo # --echo # Bug#28928: UNIX_TIMESTAMP() should be considered unary monotonic --echo # by partition pruning SET @old_time_zone= @@session.time_zone; SET @@session.time_zone = 'UTC'; --echo # Using MyISAM to get stable values on TABLE_ROWS in I_S.PARTITIONS CREATE TABLE t1 (a TIMESTAMP NULL, tz varchar(16)) ENGINE = MyISAM; CREATE TABLE t2 LIKE t1; ALTER TABLE t2 PARTITION BY RANGE (UNIX_TIMESTAMP(a)) (PARTITION `p0` VALUES LESS THAN (0), PARTITION `p-2000` VALUES LESS THAN (UNIX_TIMESTAMP('2000-01-01')), PARTITION `p-2011-MSK` VALUES LESS THAN (UNIX_TIMESTAMP('2011-03-26 23:00:00')), PARTITION `p-2011-MSD-1` VALUES LESS THAN (UNIX_TIMESTAMP('2011-10-29 22:00:00')), PARTITION `p-2011-MSD-2` VALUES LESS THAN (UNIX_TIMESTAMP('2011-10-29 23:00:00')), PARTITION `p-2012-MSK-1` VALUES LESS THAN (UNIX_TIMESTAMP('2011-10-30 00:00:00')), PARTITION `p-2012-MSK-2` VALUES LESS THAN (UNIX_TIMESTAMP('2012-03-24 23:00:00')), PARTITION `pEnd` VALUES LESS THAN (UNIX_TIMESTAMP('2038-01-19 03:14:07')), PARTITION `pMax` VALUES LESS THAN MAXVALUE); --echo # Test 'odd' values INSERT INTO t1 VALUES (NULL, 'UTC'); INSERT INTO t1 VALUES ('0000-00-00 00:00:00', 'UTC'); --echo # Test invalid values INSERT INTO t1 VALUES ('1901-01-01 00:00:00', 'UTCI'); INSERT INTO t1 VALUES ('1969-12-31 23:59:59', 'UTCI'); INSERT INTO t1 VALUES ('2038-01-19 03:14:08', 'UTCI'); INSERT INTO t1 VALUES ('1970-01-01 00:00:00', 'UTCI'); --echo # Test start range INSERT INTO t1 VALUES ('1970-01-01 00:00:01', 'UTC'); INSERT INTO t1 VALUES ('1974-02-05 21:28:16', 'UTC'); --echo # Test end range INSERT INTO t1 VALUES ('2038-01-19 03:14:06', 'UTC'); INSERT INTO t1 VALUES ('2038-01-19 03:14:07', 'UTC'); --echo # Test Daylight saving shift INSERT INTO t1 VALUES ('2011-03-26 22:59:59', 'UTC'); INSERT INTO t1 VALUES ('2011-03-26 23:00:00', 'UTC'); INSERT INTO t1 VALUES ('2011-03-26 23:00:01', 'UTC'); INSERT INTO t1 VALUES ('2011-10-29 21:59:59', 'UTC'); INSERT INTO t1 VALUES ('2011-10-29 22:00:00', 'UTC'); INSERT INTO t1 VALUES ('2011-10-29 22:00:01', 'UTC'); INSERT INTO t1 VALUES ('2011-10-29 22:59:59', 'UTC'); INSERT INTO t1 VALUES ('2011-10-29 23:00:00', 'UTC'); INSERT INTO t1 VALUES ('2011-10-29 23:00:01', 'UTC'); INSERT INTO t1 VALUES ('2011-10-29 23:59:59', 'UTC'); INSERT INTO t1 VALUES ('2011-10-30 00:00:00', 'UTC'); INSERT INTO t1 VALUES ('2011-10-30 00:00:01', 'UTC'); SET @@session.time_zone = 'Europe/Moscow'; --echo # Test 'odd' values INSERT INTO t1 VALUES (NULL, 'Moscow'); INSERT INTO t1 VALUES ('0000-00-00 00:00:00', 'Moscow'); --echo # Test invalid values INSERT INTO t1 VALUES ('0000-00-00 03:00:00', 'MoscowI'); INSERT INTO t1 VALUES ('1901-01-01 00:00:00', 'MoscowI'); INSERT INTO t1 VALUES ('1969-12-31 23:59:59', 'MoscowI'); INSERT INTO t1 VALUES ('1970-01-01 02:29:29', 'MoscowI'); INSERT INTO t1 VALUES ('2038-01-19 06:14:08', 'MoscowI'); INSERT INTO t1 VALUES ('1970-01-01 03:00:00', 'MoscowI'); --echo # values truncated to 03:00:00 due to daylight saving shift INSERT INTO t1 VALUES ('2011-03-27 02:00:00', 'MoscowI'); INSERT INTO t1 VALUES ('2011-03-27 02:00:01', 'MoscowI'); INSERT INTO t1 VALUES ('2011-03-27 02:59:59', 'MoscowI'); --echo # Test start range INSERT INTO t1 VALUES ('1970-01-01 03:00:01', 'Moscow'); INSERT INTO t1 VALUES ('1974-02-05 21:28:16', 'Moscow'); --echo # Test end range INSERT INTO t1 VALUES ('2038-01-19 06:14:06', 'Moscow'); INSERT INTO t1 VALUES ('2038-01-19 06:14:07', 'Moscow'); --echo # Test Daylight saving shift INSERT INTO t1 VALUES ('2011-03-27 01:59:59', 'Moscow'); INSERT INTO t1 VALUES ('2011-03-27 03:00:00', 'Moscow'); INSERT INTO t1 VALUES ('2011-03-27 03:00:01', 'Moscow'); INSERT INTO t1 VALUES ('2011-10-30 01:59:59', 'Moscow'); --echo # All values between 02:00 and 02:59:59 will be interpretated as DST INSERT INTO t1 VALUES ('2011-10-30 02:00:00', 'MoscowD'); INSERT INTO t1 VALUES ('2011-10-30 02:00:01', 'MoscowD'); INSERT INTO t1 VALUES ('2011-10-30 02:59:59', 'MoscowD'); INSERT INTO t1 VALUES ('2011-10-30 03:00:00', 'Moscow'); INSERT INTO t1 VALUES ('2011-10-30 03:00:01', 'Moscow'); SET @@session.time_zone = 'UTC'; INSERT INTO t2 SELECT * FROM t1; SELECT PARTITION_NAME, TABLE_ROWS FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME = 't2'; SELECT * FROM t1 ORDER BY a, tz; SELECT * FROM t2 ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-03-01 00:00:00' and '2011-03-26 23:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-03-01 00:00:00' and '2011-03-26 23:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-03-01 00:00:00' and '2011-03-26 22:59:59' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-03-01 00:00:00' and '2011-03-26 22:59:59' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-03-26 22:59:59' and '2011-03-28 00:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-03-26 22:59:59' and '2011-03-28 00:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-03-26 23:00:00' and '2011-03-28 00:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-03-26 23:00:00' and '2011-03-28 00:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 23:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 23:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 22:59:59' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 22:59:59' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 22:59:59' and '2011-10-31 00:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 22:59:59' and '2011-10-31 00:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 23:00:00' and '2011-10-31 00:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 23:00:00' and '2011-10-31 00:00:00' ORDER BY a, tz; --echo # Test end range changes DELETE FROM t2 WHERE a = 0; INSERT INTO t2 VALUES ('1970-01-01 00:00:00', 'UTC'); SELECT COUNT(*) FROM t2; SELECT COUNT(*) FROM t2 WHERE a = 0; SELECT * FROM t2 ORDER BY a, tz LIMIT 3; SELECT * FROM t2 ORDER BY a DESC, tz LIMIT 3; UPDATE t2 SET a = TIMESTAMPADD(SECOND, 1, a); SELECT MIN(a), MAX(a) FROM t2; SELECT COUNT(*) FROM t2; SELECT COUNT(*) FROM t2 WHERE a = 0; SELECT PARTITION_NAME, TABLE_ROWS FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME = 't2'; SELECT * FROM t2 ORDER BY a, tz; --echo # Test start range changes INSERT INTO t2 VALUES ('1970-01-01 00:00:00', 'UTC'); SELECT COUNT(*) FROM t2; SELECT COUNT(*) FROM t2 WHERE a = 0; SELECT * FROM t2 ORDER BY a, tz LIMIT 3; SELECT * FROM t2 ORDER BY a DESC, tz LIMIT 3; UPDATE t2 SET a = TIMESTAMPADD(SECOND, -1, a); SELECT MIN(a), MAX(a) FROM t2; SELECT COUNT(*) FROM t2; SELECT COUNT(*) FROM t2 WHERE a = 0; SELECT PARTITION_NAME, TABLE_ROWS FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME = 't2'; SELECT * FROM t2 ORDER BY a, tz; SHOW CREATE TABLE t2; TRUNCATE TABLE t2; SET @@session.time_zone = 'Europe/Moscow'; INSERT INTO t2 SELECT * FROM t1; SELECT PARTITION_NAME, TABLE_ROWS FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME = 't2'; SELECT * FROM t1 ORDER BY a, tz; SELECT * FROM t2 ORDER BY a, tz; --echo # Testing the leap from 01:59:59 to 03:00:00 SELECT * FROM t2 WHERE a BETWEEN '2011-03-01 00:00:00' and '2011-03-27 03:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-03-01 00:00:00' and '2011-03-27 03:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-03-01 00:00:00' and '2011-03-27 01:59:59' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-03-01 00:00:00' and '2011-03-27 01:59:59' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-03-26 01:59:59' and '2011-03-28 00:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-03-26 01:59:59' and '2011-03-28 00:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-03-26 03:00:00' and '2011-03-28 00:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-03-26 03:00:00' and '2011-03-28 00:00:00' ORDER BY a, tz; --echo # Testing the leap from 02:59:59 to 02:00:00 SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 02:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 02:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 02:59:59' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 02:59:59' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 03:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 03:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 01:59:59' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-01 00:00:00' and '2011-10-29 01:59:59' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 02:00:00' and '2011-10-31 00:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 02:00:00' and '2011-10-31 00:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 02:59:59' and '2011-10-31 00:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 02:59:59' and '2011-10-31 00:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 03:00:00' and '2011-10-31 00:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 03:00:00' and '2011-10-31 00:00:00' ORDER BY a, tz; SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 01:59:59' and '2011-10-31 00:00:00' ORDER BY a, tz; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a BETWEEN '2011-10-29 01:59:59' and '2011-10-31 00:00:00' ORDER BY a, tz; --echo # Test end range changes DELETE FROM t2 WHERE a = 0; INSERT INTO t2 VALUES ('1970-01-01 00:00:00', 'Moscow'); SELECT COUNT(*) FROM t2; SELECT COUNT(*) FROM t2 WHERE a = 0; SELECT * FROM t2 ORDER BY a, tz LIMIT 3; SELECT * FROM t2 ORDER BY a DESC, tz LIMIT 3; UPDATE t2 SET a = TIMESTAMPADD(SECOND, 1, a); SELECT MIN(a), MAX(a) FROM t2; SELECT COUNT(*) FROM t2; SELECT COUNT(*) FROM t2 WHERE a = 0; SELECT PARTITION_NAME, TABLE_ROWS FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME = 't2'; SELECT * FROM t2 ORDER BY a, tz; --echo # Test start range changes INSERT INTO t2 VALUES ('1970-01-01 00:00:00', 'Moscow'); SELECT COUNT(*) FROM t2; SELECT COUNT(*) FROM t2 WHERE a = 0; SELECT * FROM t2 ORDER BY a, tz LIMIT 3; SELECT * FROM t2 ORDER BY a DESC, tz LIMIT 3; UPDATE t2 SET a = TIMESTAMPADD(SECOND, -1, a); SELECT MIN(a), MAX(a) FROM t2; SELECT COUNT(*) FROM t2; SELECT COUNT(*) FROM t2 WHERE a = 0; SELECT PARTITION_NAME, TABLE_ROWS FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME = 't2'; SELECT * FROM t2 ORDER BY a, tz; SHOW CREATE TABLE t2; TRUNCATE TABLE t2; DROP TABLE t1, t2; SET @@session.time_zone= @old_time_zone;
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