47 lines
1.7 KiB
SQL
47 lines
1.7 KiB
SQL
-- trigger
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DROP TRIGGER IF EXISTS trg_rfa_revisions_is_current;
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DROP TRIGGER IF EXISTS trg_rfa_revisions_is_current_upd;
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DROP TRIGGER IF EXISTS trg_rfa_revisions_auto_reset;
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-- ============================================================
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-- ⚙️ TRIGGERS
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-- ============================================================
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-- ป้องกันไม่ให้มี revision ที่ is_current=TRUE ซ้ำใน rfa_id เดียวกัน
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DELIMITER $$
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CREATE TRIGGER trg_rfa_revisions_is_current
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BEFORE INSERT ON rfa_revisions
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FOR EACH ROW
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BEGIN
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IF NEW.is_current = TRUE THEN
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IF (SELECT COUNT(*) FROM rfa_revisions WHERE rfa_id = NEW.rfa_id AND is_current = TRUE) > 0 THEN
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SIGNAL SQLSTATE '45000'
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SET MESSAGE_TEXT = 'Cannot insert more than one current revision per RFA.';
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END IF;
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END IF;
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END$$
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DELIMITER ;
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DELIMITER $$
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CREATE TRIGGER trg_rfa_revisions_is_current_upd
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BEFORE UPDATE ON rfa_revisions
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FOR EACH ROW
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BEGIN
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IF NEW.is_current = TRUE AND (OLD.is_current IS NULL OR OLD.is_current = FALSE) THEN
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IF (SELECT COUNT(*) FROM rfa_revisions WHERE rfa_id = NEW.rfa_id AND is_current = TRUE AND correspondences_id <> OLD.correspondences_id) > 0 THEN
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SIGNAL SQLSTATE '45000'
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SET MESSAGE_TEXT = 'Cannot set more than one current revision per RFA.';
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END IF;
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END IF;
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END$$
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DELIMITER ;
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-- ทำให้เวลาสร้าง revision ใหม่ที่ is_current=TRUE ระบบจะ set revision เดิมเป็น FALSE อัตโนมัติ
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DELIMITER $$
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CREATE TRIGGER trg_rfa_revisions_auto_reset
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BEFORE INSERT ON rfa_revisions
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FOR EACH ROW
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BEGIN
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IF NEW.is_current = TRUE THEN
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UPDATE rfa_revisions
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SET is_current = FALSE
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WHERE rfa_id = NEW.rfa_id;
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END IF;
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END$$
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DELIMITER ; |