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#
# Bug#50561: ALTER PARTITIONS does not have adequate lock, breaks with
# concurrent I_S query
create table t1 (a int)
engine = innodb
partition by range (a)
(partition p0 values less than MAXVALUE);
insert into t1 values (1), (11), (21), (33);
SELECT * FROM t1;
a
1
11
21
33
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
/*!50100 PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN MAXVALUE ENGINE = InnoDB) */
t1#P#p0.ibd
t1.frm
t1.par
SET DEBUG_SYNC='before_open_in_get_all_tables SIGNAL parked WAIT_FOR open';
SET DEBUG_SYNC='partition_open_error SIGNAL alter WAIT_FOR finish';
SELECT * FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME = 't1' AND TABLE_SCHEMA = 'test';
SET DEBUG_SYNC = 'now WAIT_FOR parked';
# When waiting for the name lock in get_all_tables in sql_show.cc
# this will not be concurrent any more, thus the TIMEOUT
SET DEBUG_SYNC = 'before_rename_partitions SIGNAL open WAIT_FOR alter TIMEOUT 1';
# Needs to be executed twice, since first is this 'SET DEBUG_SYNC ...'
SET DEBUG_SYNC = 'before_close_thread_tables SIGNAL finish EXECUTE 2';
ALTER TABLE t1 REORGANIZE PARTITION p0 INTO
(PARTITION p0 VALUES LESS THAN (10),
PARTITION p10 VALUES LESS THAN MAXVALUE);
Warnings:
Warning 1639 debug sync point wait timed out
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
NULL test t1 p0 NULL 1 NULL RANGE NULL a NULL 10 1 16384 16384 NULL 0 0 NULL NULL NULL NULL default NULL
NULL test t1 p10 NULL 2 NULL RANGE NULL a NULL MAXVALUE 3 5461 16384 NULL 0 0 NULL NULL NULL NULL default NULL
t1#P#p0.ibd
t1#P#p10.ibd
t1.frm
t1.par
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
/*!50100 PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (10) ENGINE = InnoDB,
PARTITION p10 VALUES LESS THAN MAXVALUE ENGINE = InnoDB) */
SELECT * FROM t1;
a
1
11
21
33
drop table t1;
SET DEBUG_SYNC = 'RESET';
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