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Type:
Bug
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Status: Done
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Priority:
Low
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Resolution: Fixed
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Affects Version/s: 3.0.10
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Fix Version/s: 3.0.12
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Component/s: None
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Labels:None
pt-osc fails with the following error, when using a table with a (nullable) unique key and a row with NULL values:
2018-06-26T14:21:48 Error copying rows from `test`.`t1` to `test`.`_t1_new`: Use of uninitialized value in string ne at ./pt-online-schema-change line 6133.
$ pt-online-schema-change --version pt-online-schema-change 3.0.10
How to repeat:
CREATE TABLE `t1` (
`id` int(11) DEFAULT NULL,
`site_name` varchar(25) DEFAULT NULL,
`last_update` datetime DEFAULT NULL,
UNIQUE KEY `idx_id` (`id`),
KEY `idx_last_update` (`last_update`),
KEY `idx_site_name` (`site_name`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO `t1` VALUES (1385108873,'Carolyn Ryan','2018-01-13 17:05:24'),(2140660022,'Patricia Garza','2018-01-13 19:07:51'),(1473481373,'Rachel George','2017-12-05 21:09:53'),(1394124308,'Mrs. Ms. Miss Janet Dixon','2017-10-28 07:07:41'),(1978918050,'Louis Gray Jr. Sr. I II I','2017-11-01 22:10:39'),(1275940242,'Lois Spencer','2018-02-22 01:01:38'),(NULL,NULL,NULL);
pt-online-schema-change --chunk-index idx_id --chunk-size 1 --nocheck-plan --execute h=127.0.0.1,P=5713,u=root,p=msandbox,D=test,t=t1
Full output from the run:
pt-online-schema-change --chunk-index idx_id --chunk-size 1 --nocheck-plan --execute h=127.0.0.1,P=5713,u=root,p=msandbox,D=test,t=t1 No slaves found. See --recursion-method if host bm-support01 has slaves. Not checking slave lag because no slaves were found and --check-slave-lag was not specified. Operation, tries, wait: analyze_table, 10, 1 copy_rows, 10, 0.25 create_triggers, 10, 1 drop_triggers, 10, 1 swap_tables, 10, 1 update_foreign_keys, 10, 1 Altering `test`.`t1`... Creating new table... Created new table test._t1_new OK. 2018-06-26T14:47:06 Creating triggers... 2018-06-26T14:47:06 Created triggers OK. 2018-06-26T14:47:06 Copying approximately 5 rows... 2018-06-26T14:47:06 Dropping triggers... 2018-06-26T14:47:06 Dropped triggers OK. 2018-06-26T14:47:06 Dropping new table... 2018-06-26T14:47:06 Dropped new table OK. `test`.`t1` was not altered. 2018-06-26T14:47:06 Error copying rows from `test`.`t1` to `test`.`_t1_new`: Use of uninitialized value in string ne at ./pt-online-schema-change line 6133.
I'll attach debug run too, in case it's needed.
PTDEBUG=1 pt-online-schema-change --chunk-index idx_id --chunk-size 1 --nocheck-plan --execute h=127.0.0.1,P=5713,u=root,p=msandbox,D=test,t=t1 > pt-osc.debug.out 2>&1
An interesting thing to note is that error message changes while doing debug outputs:
2018-06-26T14:50:50 Error copying rows from `test`.`t1` to `test`.`_t1_new`: Use of uninitialized value in join or string at ./pt-online-schema-change line 6092.
