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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
BEGIN
CHANGE COLUMN
COMMIT
CREATE DATABASE
CREATE INDEX
CREATE ROLE
CREATE TABLE LIKE
CREATE TABLE
CREATE USER
CREATE VIEW
DEALLOCATE
DELETE
DESC
DESCRIBE
DO
DROP COLUMN
DROP DATABASE
DROP INDEX
DROP ROLE
DROP TABLE
DROP USER
DROP VIEW
EXECUTE
EXPLAIN ANALYZE
EXPLAIN
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
REVOKE <privileges>
REVOKE <role>
ROLLBACK
SELECT
SET DEFAULT ROLE
SET [NAMES|CHARACTER SET]
SET PASSWORD
SET ROLE
SET TRANSACTION
SET [GLOBAL|SESSION] <variable>
SHOW ANALYZE STATUS
SHOW CHARACTER SET
SHOW COLLATION
SHOW [FULL] COLUMNS FROM
SHOW CREATE TABLE
SHOW CREATE USER
SHOW DATABASES
SHOW ENGINES
SHOW ERRORS
SHOW [FULL] FIELDS FROM
SHOW GRANTS
SHOW INDEXES [FROM|IN]
SHOW INDEX [FROM|IN]
SHOW KEYS [FROM|IN]
SHOW PRIVILEGES
SHOW [FULL] PROCESSSLIST
SHOW SCHEMAS
SHOW STATUS
SHOW [FULL] TABLES
SHOW TABLE REGIONS
SHOW TABLE STATUS
SHOW [GLOBAL|SESSION] VARIABLES
SHOW WARNINGS
SPLIT REGION
START TRANSACTION
TRACE
TRUNCATE
UPDATE
USE
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重要
你正在查看 TiDB 数据库的较旧版本 (TiDB v3.1) 的文档。
如无特殊需求,建议使用 TiDB 数据库的最新 LTS 版本。
TRACE
TRACE
语句用于提供查询执行的详细信息,可通过 TiDB 服务器状态端口所公开的图形界面进行查看。
语法图
TraceStmt:
TraceableStmt:
示例
trace format='row' select * from mysql.user;
+---------------------------+-----------------+------------+
| operation | startTS | duration |
+---------------------------+-----------------+------------+
| session.getTxnFuture | 10:33:34.647148 | 3.847µs |
| ├─session.Execute | 10:33:34.647146 | 536.233µs |
| ├─session.ParseSQL | 10:33:34.647182 | 19.868µs |
| ├─executor.Compile | 10:33:34.647219 | 295.688µs |
| ├─session.runStmt | 10:33:34.647533 | 116.229µs |
| ├─session.CommitTxn | 10:33:34.647631 | 5.44µs |
| ├─recordSet.Next | 10:33:34.647707 | 833.103µs |
| ├─tableReader.Next | 10:33:34.647709 | 806.783µs |
| ├─recordSet.Next | 10:33:34.648572 | 19.367µs |
| └─tableReader.Next | 10:33:34.648575 | 1.783µs |
+---------------------------+-----------------+------------+
10 rows in set (0.00 sec)
CREATE TABLE t1 (id int not null primary key AUTO_INCREMENT);
Query OK, 0 rows affected (0.11 sec)
INSERT INTO t1 VALUES (1),(2),(3),(4),(5);
Query OK, 5 rows affected (0.02 sec)
Records: 5 Duplicates: 0 Warnings: 0
TRACE FORMAT='json' SELECT * FROM t1 WHERE id = 2;
operation: [
{"ID":{"Trace":"60d20d005593de87","Span":"44e5b309242ffe2f","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"c2Vzc2lvbi5nZXRUeG5GdXR1cmU="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE2MTQ3ODYtMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE2MjA0MDYtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":[
{"ID":{"Trace":"60d20d005593de87","Span":"4dbf8f2ca373b4b0","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"c2Vzc2lvbi5QYXJzZVNRTA=="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE2NjE1MTQtMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3MDYxNjgtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"6b6d6916df809604","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"ZXhlY3V0b3IuQ29tcGlsZQ=="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3NTcyODUtMDY6MDA="},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3MzE0MjYtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"3f1bcdd402a72911","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"c2Vzc2lvbi5Db21taXRUeG4="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3OTgyNjItMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE4MDU1NzYtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"58c1f7d66dc5afbc","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"c2Vzc2lvbi5ydW5TdG10"},
{"Key":"_schema:name","Value":null},
{"Key":"Msg","Value":"eyJzcWwiOiJTRUxFQ1QgKiBGUk9NIHQxIFdIRVJFIGlkID0gMiJ9"},
{"Key":"Time","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3ODA1NjgtMDY6MDA="},
{"Key":"_schema:log","Value":null},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE4MTk5MzMtMDY6MDA="},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE3NzcyNDItMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"6bd8cc440fb31ed7","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"c2Vzc2lvbi5FeGVjdXRl"},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE2MTEwODktMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE4NTU0My0wNjowMA=="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"61d0b809f6cc018b","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"cmVjb3JkU2V0Lk5leHQ="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDE4NzQ1NTYtMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDIyOTg4NjYtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null},
{"ID":{"Trace":"60d20d005593de87","Span":"2bd2c3d47ccb1133","Parent":"79d146dac9a29a7e"},
"Annotations":[
{"Key":"Name","Value":"cmVjb3JkU2V0Lk5leHQ="},
{"Key":"_schema:name","Value":null},
{"Key":"Span.Start","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDIzMjY0ODgtMDY6MDA="},
{"Key":"Span.End","Value":"MjAxOS0wNC0xN1QxMDozOToxMC45NDIzMjkwMDMtMDY6MDA="},
{"Key":"_schema:Timespan","Value":null}
],
"Sub":null}
]
}
]
1 row in set (0.00 sec)
可将 JSON 格式的跟踪文件粘贴到跟踪查看器中。查看器可通过 TiDB 状态端口访问:
MySQL 兼容性
TRACE
语句是 TiDB 对 MySQL 语法的扩展。
另请参阅
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