Details
-
Bug
-
Status: Open (View Workflow)
-
Major
-
Resolution: Unresolved
-
10.2.24, 10.3.15, 10.4.5
-
None
Description
Problem found during RQG testing.
|
The output of the MTR based replay test
|
Two connections run many loops containing the sequence
|
DELETE FROM t0 WHERE col_int = 1 OR col_int IS NULL ; INSERT INTO t0 (col1,col2, col_int) VALUES (1,1,1) , (1,1,1) ; COMMIT ;
|
DELETE FROM t0 WHERE col_int = 1 OR col_int IS NULL ; INSERT INTO t0 (col1,col2, col_int) VALUES (1,1,1) , (1,1,1) ; COMMIT ;
|
ALTER TABLE t0 ADD COLUMN col_int_g_copy INTEGER GENERATED ALWAYS AS (col_int) VIRTUAL ; ALTER TABLE t0 DROP COLUMN col_int_g ; ALTER TABLE t0 CHANGE COLUMN col_int_g_copy col_int_g INTEGER GENERATED ALWAYS AS (col_int) VIRTUAL ;
|
SET @kill_id = CONNECTION_ID() ; KILL SOFT CONNECTION @kill_id ;
|
|
and a third connection observes the processlist is after some first phase like
|
SHOW PROCESSLIST;
|
Id User Host db Command Time State Info Progress
|
4 root localhost test Query 0 init SHOW PROCESSLIST 0.000
|
78 root localhost test Query 106 Waiting for table metadata lock ALTER TABLE t0 CHANGE COLUMN col_int_g_copy col_int_g INTEGER GENERATED ALWAYS AS (col_int) VIRTUAL 0.000
|
79 root localhost test Query 106 Waiting for table level lock INSERT INTO t0 (col1,col2, col_int) VALUES (1,1,1) , (1,1,1) 0.000
|
...
|
SHOW PROCESSLIST;
|
Id User Host db Command Time State Info Progress
|
4 root localhost test Query 0 init SHOW PROCESSLIST 0.000
|
78 root localhost test Query 115 Waiting for table metadata lock ALTER TABLE t0 CHANGE COLUMN col_int_g_copy col_int_g INTEGER GENERATED ALWAYS AS (col_int) VIRTUAL 0.000
|
79 root localhost test Query 115 Waiting for table level lock INSERT INTO t0 (col1,col2, col_int) VALUES (1,1,1) , (1,1,1) 0.000
|
with two connections showing no changes except raising time.
|
 |
10.2.24 commit 8f9c8579d0bfa12aa7966b773864d816d68be064 2019-05
|
10.3.15 commit 651a43e0a0361098c35164a128ca588a2989d8e1 2019-05-07
|
10.4.5 commit baadbe96019b205164167928d80e836ebbb6bcfe 2019-04-23
|