ADMIN SHOW DDL [JOBS|JOB QUERIES]
The ADMIN SHOW DDL [JOBS|JOB QUERIES] statement shows information about running and recently completed DDL jobs.
Synopsis
- AdminStmt
- NumList
- WhereClauseOptional
AdminStmt ::=
'ADMIN' ( 'SHOW' ( 'DDL' ( 'JOBS' Int64Num? WhereClauseOptional | 'JOB' 'QUERIES' NumList )? | TableName 'NEXT_ROW_ID' | 'SLOW' AdminShowSlow ) | 'CHECK' ( 'TABLE' TableNameList | 'INDEX' TableName Identifier ( HandleRange ( ',' HandleRange )* )? ) | 'RECOVER' 'INDEX' TableName Identifier | 'CLEANUP' ( 'INDEX' TableName Identifier | 'TABLE' 'LOCK' TableNameList ) | 'CHECKSUM' 'TABLE' TableNameList | 'CANCEL' 'DDL' 'JOBS' NumList | 'RELOAD' ( 'EXPR_PUSHDOWN_BLACKLIST' | 'OPT_RULE_BLACKLIST' | 'BINDINGS' ) | 'PLUGINS' ( 'ENABLE' | 'DISABLE' ) PluginNameList | 'REPAIR' 'TABLE' TableName CreateTableStmt | ( 'FLUSH' | 'CAPTURE' | 'EVOLVE' ) 'BINDINGS' )
NumList ::=
Int64Num ( ',' Int64Num )*
WhereClauseOptional ::=
WhereClause?
Examples
ADMIN SHOW DDL
To view the currently running DDL jobs, use ADMIN SHOW DDL:
ADMIN SHOW DDL;
mysql> ADMIN SHOW DDL;
+------------+--------------------------------------+---------------+--------------+--------------------------------------+-------+
| SCHEMA_VER | OWNER_ID | OWNER_ADDRESS | RUNNING_JOBS | SELF_ID | QUERY |
+------------+--------------------------------------+---------------+--------------+--------------------------------------+-------+
| 26 | 2d1982af-fa63-43ad-a3d5-73710683cc63 | 0.0.0.0:4000 | | 2d1982af-fa63-43ad-a3d5-73710683cc63 | |
+------------+--------------------------------------+---------------+--------------+--------------------------------------+-------+
1 row in set (0.00 sec)
ADMIN SHOW DDL JOBS
To view all the results in the current DDL job queue (including tasks that are running and waiting to be run) and the last ten results in the completed DDL job queue, use ADMIN SHOW DDL JOBS:
ADMIN SHOW DDL JOBS;
mysql> ADMIN SHOW DDL JOBS;
+--------+---------+--------------------+--------------+----------------------+-----------+----------+-----------+---------------------+---------------------+---------+
| JOB_ID | DB_NAME | TABLE_NAME | JOB_TYPE | SCHEMA_STATE | SCHEMA_ID | TABLE_ID | ROW_COUNT | START_TIME | END_TIME | STATE |
+--------+---------+--------------------+--------------+----------------------+-----------+----------+-----------+---------------------+---------------------+---------+
| 59 | test | t1 | add index | write reorganization | 1 | 55 | 88576 | 2020-08-17 07:51:58 | NULL | running |
| 60 | test | t2 | add index | none | 1 | 57 | 0 | 2020-08-17 07:51:59 | NULL | none |
| 58 | test | t2 | create table | public | 1 | 57 | 0 | 2020-08-17 07:41:28 | 2020-08-17 07:41:28 | synced |
| 56 | test | t1 | create table | public | 1 | 55 | 0 | 2020-08-17 07:41:02 | 2020-08-17 07:41:02 | synced |
| 54 | test | t1 | drop table | none | 1 | 50 | 0 | 2020-08-17 07:41:02 | 2020-08-17 07:41:02 | synced |
| 53 | test | t1 | drop index | none | 1 | 50 | 0 | 2020-08-17 07:35:44 | 2020-08-17 07:35:44 | synced |
| 52 | test | t1 | add index | public | 1 | 50 | 451010 | 2020-08-17 07:34:43 | 2020-08-17 07:35:16 | synced |
| 51 | test | t1 | create table | public | 1 | 50 | 0 | 2020-08-17 07:34:02 | 2020-08-17 07:34:02 | synced |
| 49 | test | t1 | drop table | none | 1 | 47 | 0 | 2020-08-17 07:34:02 | 2020-08-17 07:34:02 | synced |
| 48 | test | t1 | create table | public | 1 | 47 | 0 | 2020-08-17 07:33:37 | 2020-08-17 07:33:37 | synced |
| 46 | mysql | stats_extended | create table | public | 3 | 45 | 0 | 2020-08-17 06:42:38 | 2020-08-17 06:42:38 | synced |
| 44 | mysql | opt_rule_blacklist | create table | public | 3 | 43 | 0 | 2020-08-17 06:42:38 | 2020-08-17 06:42:38 | synced |
+--------+---------+--------------------+--------------+----------------------+-----------+----------+-----------+---------------------+---------------------+---------+
12 rows in set (0.00 sec)
From the output above:
Job 59 is currently in progress (
STATEofrunning). The schema state is currently inwrite reorganization, but will switch topubliconce the task is completed to note that the change can be observed publicly by user sessions. Theend_timecolumn is alsoNULLindicating that the completion time for the job is currently not known.Job 60 is an
add indexjob, which is currently queued waiting for job 59 to complete. When job 59 completes, theSTATEof job 60 will switch torunning.For destructive changes such as dropping an index or dropping a table, the
SCHEMA_STATEwill change tononewhen the job is complete. For additive changes, theSCHEMA_STATEwill change topublic.
To limit the number of rows shown, specify a number and a where condition:
ADMIN SHOW DDL JOBS [NUM] [WHERE where_condition];
NUM: to view the lastNUMresults in the completed DDL job queue. If not specified,NUMis by default 10.WHERE: to add filter conditions.
ADMIN SHOW DDL JOB QUERIES
To view the original SQL statements of the DDL job corresponding to job_id, use ADMIN SHOW DDL JOB QUERIES:
ADMIN SHOW DDL JOBS;
ADMIN SHOW DDL JOB QUERIES 51;
mysql> ADMIN SHOW DDL JOB QUERIES 51;
+--------------------------------------------------------------+
| QUERY |
+--------------------------------------------------------------+
| CREATE TABLE t1 (id INT NOT NULL PRIMARY KEY auto_increment) |
+--------------------------------------------------------------+
1 row in set (0.02 sec)
You can only search the running DDL job corresponding to job_id within the last ten results in the DDL history job queue.
MySQL compatibility
This statement is a TiDB extension to MySQL syntax.