^^&&^^

Edit File: partition_sync.test

--source include/have_partition.inc
--source include/have_debug.inc
# Save the initial number of concurrent sessions.
--source include/count_sessions.inc

--echo #
--echo # Bug #43867 ALTER TABLE on a partitioned table 
--echo #            causes unnecessary deadlocks
--echo #

CREATE TABLE t1 (a int) PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (1),
 PARTITION p1 VALUES LESS THAN (2));

INSERT INTO t1 VALUES (0),(1);

connect(con1,localhost,root);

--echo # Connection 2
connection con1;
BEGIN;
SELECT * FROM t1;

--echo # Connection 1
connection default;
--error ER_DROP_PARTITION_NON_EXISTENT
ALTER TABLE t1 DROP PARTITION p3;

--echo # Connection 2
connection con1;
--echo # This failed with deadlock and should not do so.
SELECT * FROM t1;

--echo # Connection 1
connection default;
disconnect con1;
DROP TABLE t1;

--echo #
--echo # Bug #46654 False deadlock on concurrent DML/DDL 
--echo #            with partitions, inconsistent behavior
--echo #

--disable_warnings
DROP TABLE IF EXISTS tbl_with_partitions;
--enable_warnings

CREATE TABLE tbl_with_partitions ( i INT ) 
	PARTITION BY HASH(i);
INSERT INTO tbl_with_partitions VALUES (1);

connect(con2,localhost,root);
connect(con3,localhost,root);

--echo # Connection 3
connection con3;
LOCK TABLE tbl_with_partitions READ;

--echo # Connection 1
--echo # Access table with disabled autocommit
connection default;
SET AUTOCOMMIT = 0;
SELECT * FROM tbl_with_partitions;

--echo # Connection 2
--echo # Alter table, abort after prepare
connection con2;
set session debug="+d,abort_copy_table";
--error ER_LOCK_WAIT_TIMEOUT
ALTER TABLE tbl_with_partitions ADD COLUMN f INT;

--echo # Connection 1
--echo # Try accessing the table after Alter aborted.
--echo # This used to give ER_LOCK_DEADLOCK.
connection default;
SELECT * FROM tbl_with_partitions;

--echo # Connection 3
connection con3;
UNLOCK TABLES;

--echo # Connection 1
--echo # Cleanup
connection default;
disconnect con2;
disconnect con3;
DROP TABLE tbl_with_partitions;

# Check that all connections opened by test cases in this file are really
# gone so execution of other tests won't be affected by their presence.
--source include/wait_until_count_sessions.inc