Help Center/ Data Admin Service/ User Guide (ME-Abu Dhabi Region)/ User Guide/ Enterprise Change Approval/ Data Schemes/ SQL Modification
Updated on 2023-03-28 GMT+08:00
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SQL Modification

Scenarios

When you need to change the data or structure of a database, you can use SQL Modification.

Procedure

  1. On the top menu bar, choose Data Schemes > SQL Modification.
  2. In the Basic Information area, select the target database. You can select multiple databases.
  3. Enter the SQL statements or upload a SQL file.
  4. Enter the estimated number of rows that may be affected in this modification.
  5. In the Task Control Items area, select an execution mode. Set Execute Transaction, Skip Error, and Back Up Data.

    • Execution Mode: Select an execution mode as required.
    • Execute Transaction: This function is disabled by default. When disabled, SQL statements are executed one by one. If a SQL fails to execute, the execution will stop but will not roll back. When this function is enabled, if a SQL fails to execute, all the executed SQL statements will be rolled back (DML only, DDL not included).
    • Skip Error: It is recommended that you enable this function. If an error occurs during execution, the system skips the SQL statement that fails to execute and continue to execute the next statement.
    • Back Up Data:
      • This function is disabled by default. To ensure your data security, it is recommended that you enable this function before making SQL modifications. The number of rows to be backed up cannot exceed 100,000.
      • If this function is enabled, the SQL statement set or imported SQL file used during modification will be automatically backed up in case that you want to roll back the modification.

  6. Click Submit to go to the Perform Prechecks page.
  7. Check whether the precheck is passed.

    If the precheck fails, view the failure cause. If you need to update the uploaded file, click Modify Ticket to return to the previous page. Alternatively, click Modify SQL Statements.

    After the modification is complete, click OK. The system automatically performs the precheck again.

  8. After the precheck is passed, click Submit for Approval.
  9. The system performs the approval according to the approval process set for the database. After the approval is complete, click View Task Execution Info to view the approval progress.
  10. If you select Manually execute after approval for Execution Mode, click Execute Modification.

    SQL statements that can be backed up include delete, update, insert_select, and replace_select.

  11. The SQL modification is complete after the backup.
Parent topic: Data Schemes