start-transaction.md

title	summary	category
START TRANSACTION | TiDB SQL Statement Reference	An overview of the usage of START TRANSACTION for the TiDB database.	reference

START TRANSACTION

This statement starts a new transaction inside of TiDB. It is similar to the statements BEGIN and SET autocommit=0.

In the absense of a START TRANSACTION statement, every statement will by default autocommit in its own transaction. This behavior ensures MySQL compatibility.

Synopsis

BeginTransactionStmt:

Examples

mysql> CREATE TABLE t1 (a int NOT NULL PRIMARY KEY);
Query OK, 0 rows affected (0.12 sec)

mysql> START TRANSACTION;
Query OK, 0 rows affected (0.00 sec)

mysql> INSERT INTO t1 VALUES (1);
Query OK, 1 row affected (0.00 sec)

mysql> COMMIT;
Query OK, 0 rows affected (0.01 sec)

MySQL compatibility

This statement is understood to be fully compatible with MySQL. Any compatibility differences should be reported via an issue on GitHub.

See also

• COMMIT
• ROLLBACK
• BEGIN