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ADD COLUMN
ADD INDEX
ADMIN
ADMIN CANCEL DDL
ADMIN CHECKSUM TABLE
ADMIN CHECK [TABLE|INDEX]
ADMIN SHOW DDL [JOBS|QUERIES]
ALTER DATABASE
ALTER INSTANCE
ALTER TABLE
ALTER USER
ANALYZE TABLE
BACKUP
BEGIN
CHANGE COLUMN
CHANGE DRAINER
CHANGE PUMP
COMMIT
CREATE [GLOBAL|SESSION] BINDING
CREATE DATABASE
CREATE INDEX
CREATE ROLE
CREATE SEQUENCE
CREATE TABLE LIKE
CREATE TABLE
CREATE USER
CREATE VIEW
DEALLOCATE
DELETE
DESC
DESCRIBE
DO
DROP [GLOBAL|SESSION] BINDING
DROP COLUMN
DROP DATABASE
DROP INDEX
DROP ROLE
DROP SEQUENCE
DROP STATS
DROP TABLE
DROP USER
DROP VIEW
EXECUTE
EXPLAIN ANALYZE
EXPLAIN
FLASHBACK TABLE
FLUSH PRIVILEGES
FLUSH STATUS
FLUSH TABLES
GRANT <privileges>
GRANT <role>
INSERT
KILL [TIDB]
LOAD DATA
LOAD STATS
MODIFY COLUMN
PREPARE
RECOVER TABLE
RENAME INDEX
RENAME TABLE
REPLACE
RESTORE
REVOKE <privileges>
REVOKE <role>
ROLLBACK
SELECT
SET DEFAULT ROLE
SET [NAMES|CHARACTER SET]
SET PASSWORD
SET ROLE
SET TRANSACTION
SET [GLOBAL|SESSION] <variable>
SHOW [BACKUPS|RESTORES]
SHOW ANALYZE STATUS
SHOW [GLOBAL|SESSION] BINDINGS
SHOW BUILTINS
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SHOW COLLATION
SHOW [FULL] COLUMNS FROM
SHOW CONFIG
SHOW CREATE SEQUENCE
SHOW CREATE TABLE
SHOW CREATE USER
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SHOW ERRORS
SHOW [FULL] FIELDS FROM
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SHOW [FULL] PROCESSSLIST
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SHOW STATS_HISTOGRAMS
SHOW STATS_META
SHOW STATUS
SHOW TABLE NEXT_ROW_ID
SHOW TABLE REGIONS
SHOW TABLE STATUS
SHOW [FULL] TABLES
SHOW [GLOBAL|SESSION] VARIABLES
SHOW WARNINGS
SHUTDOWN
SPLIT REGION
START TRANSACTION
TRACE
TRUNCATE
UPDATE
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ADMIN SHOW DDL [JOBS|QUERIES]
ADMIN SHOW DDL [JOBS|QUERIES]
语句显示了正在运行和最近完成的 DDL 作业的信息。
语法图
- 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?
示例
ADMIN SHOW DDL
可以通过 ADMIN SHOW DDL
语句查看当前正在运行的 DDL 作业:
ADMIN SHOW DDL;
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
ADMIN SHOW DDL JOBS
语句用于查看当前 DDL 作业队列中的所有结果(包括正在运行以及等待运行的任务)以及已执行完成的 DDL 作业队列中的最近十条结果。
ADMIN SHOW DDL JOBS;
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)
由上述 ADMIN
查询结果可知:
job_id
为 59 的 DDL 作业当前正在进行中(STATE
列显示为running
)。SCHEMA_STATE
列显示了表当前处于write reorganization
状态,一旦任务完成,将更改为public
,以便用户会话可以公开观察到状态变更。end_time
列显示为NULL
,表明当前作业的完成时间未知。job_id
为 60 的JOB_TYPE
显示为add index
,表明正在排队等待job_id
为 59 的作业完成。当作业 59 完成时,作业 60 的STATE
将更改为running
。对于破坏性的更改(例如删除索引或删除表),当作业完成时,
SCHEMA_STATE
将变为none
。对于附加更改,SCHEMA_STATE
将变为public
。
若要限制表中显示的行数,可以指定 NUM
和 WHERE
条件:
ADMIN SHOW DDL JOBS [NUM] [WHERE where_condition];
NUM
:用于查看已经执行完成的 DDL 作业队列中最近NUM
条结果;未指定时,默认值为 10。WHERE
:WHERE
子句,用于添加过滤条件。
ADMIN SHOW DDL JOB QUERIES
ADMIN SHOW DDL JOB QUERIES
语句用于查看 job_id
对应的 DDL 任务的原始 SQL 语句:
ADMIN SHOW DDL JOBS;
ADMIN SHOW DDL JOB QUERIES 51;
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)
只能在 DDL 历史作业队列中最近十条结果中搜索与 job_id
对应的正在运行中的 DDL 作业。
MySQL 兼容性
ADMIN SHOW DDL [JOBS|QUERIES]
语句是 TiDB 对 MySQL 语法的扩展。