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Why Are My MySQL CHECK Constraints Not Working?

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2025-01-10 12:16:41806browse

Why Are My MySQL CHECK Constraints Not Working?

Debugging MySQL CHECK Constraint Problems

When implementing a CHECK constraint on the "SD" column within your "Customer" table, you might find that MySQL doesn't report an error even when the constraint is violated. This is often due to your MySQL version.

MySQL's support for CHECK constraints began with version 8.0.16. Older versions will process the CHECK clause but effectively ignore it. The solution is to upgrade to MySQL 8.0.16 or a newer release.

If problems persist after upgrading, consider using a trigger as a workaround. Triggers can monitor insert operations and correct any data that violates the constraint before it's saved to the database.

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