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Configuring a SQL Blacklist
Updated on 2024-07-30 GMT+08:00
Configuring a SQL Blacklist
To prevent some SQL statements being executed, you can configure a blacklist and add those statements to it.
SQL statement concurrency control aims to keep DDM instances running stably even if there is a sudden increase in concurrent SQL statements.
Procedure
- Log in to the DDM console.
- In the instance list, locate the instance that you want to configure a SQL blacklist for and click its name.
- On the displayed page, in the navigation pane on the left, choose Schemas.
- In the schema list, locate the schema that you want to configure a blacklist for and click More > Configure SQL Blacklist in the Operation column.
Figure 1 Configuring SQL blacklist
- In the displayed dialog box, click Edit, enter the required SQL statements or regular expressions in prefix match, full-text, and regular expression match boxes, and click OK.
- Prefix Match: Enter SQL statements that contain keywords such as DROP or DELETE and are not allowed by the current schema.
- Full-text Match: Enter full-text SQL statements that are not allowed by the current schema. Multiple spaces and line breaks will not be treated as if they were replaced or truncated as a single space.
- Regular Expression Match: Enter regular expressions that are not allowed by the current schema.
- Separate SQL statements in the blacklist with semicolons (;). The size of SQL statements for prefix match, full-text match, and regular expression match cannot exceed 1 KB, respectively.
- If you want to clear all the SQL statements in prefix match and full-text match areas, clear them separately and click OK.
Parent topic: Schema Management
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