SingleStore DB

BEGIN

Commits any existing open transaction on the current connection and starts a new transaction.

Syntax
START TRANSACTION | BEGIN [WORK]
Remarks
  • This command must be run on the master aggregator or a child aggregator node (see Node Requirements for SingleStore DB Commands. Note that you must connect to the master aggregator when running this command on reference tables.

  • If the transaction is successful, execute the COMMIT command to commit the changes; if the transaction is unsuccessful or needs to be reverted, then execute the ROLLBACK command to revert the changes.

Example

For this example, consider the following Employee table:

ID

Name

30

Jim

20

Rob

40

Rick

BEGIN;
UPDATE Employee SET Name = "John" WHERE ID = 300;
****
Query OK, 0 rows affected (0.00 sec)
Rows matched: 0  Changed: 0  Warnings: 0

Run the SELECT query to verify if the UPDATE is correct:

SELECT * FROM Employee;
****
+------+-------+
| ID   | Name  |
+------+-------+
|   30 | Jim   |
|   20 | Rob   |
|   40 | Rick  |
+------+-------+

Run ROLLBACK since there were no matching results for the ID and the UPDATE was not successful.

ROLLBACK;

Note: Before the user runs COMMIT or ROLLBACK, only that user can see the updates made after BEGIN was run.