28 lines
922 B
SQL
28 lines
922 B
SQL
-- Remove invalid record types before applying constraint
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DELETE FROM dns_records WHERE record_type NOT IN ('A', 'AAAA', 'CNAME', 'TXT');
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-- Now apply the constraint
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-- MySQL doesn't support DROP CONSTRAINT syntax for CHECK constraints
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-- ALTER TABLE dns_records DROP CONSTRAINT dns_records_record_type_check;
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-- MySQL doesn't support table-level CHECK constraints, using trigger instead
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DELIMITER //
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CREATE TRIGGER check_record_type_before_insert
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BEFORE INSERT ON dns_records
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FOR EACH ROW
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BEGIN
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IF NEW.record_type NOT IN ('A', 'AAAA', 'CNAME', 'TXT') THEN
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SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Invalid record type';
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END IF;
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END;
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//
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CREATE TRIGGER check_record_type_before_update
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BEFORE UPDATE ON dns_records
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FOR EACH ROW
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BEGIN
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IF NEW.record_type NOT IN ('A', 'AAAA', 'CNAME', 'TXT') THEN
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SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Invalid record type';
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END IF;
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END;
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//
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DELIMITER ; |