-- Running upgrade f3a8c2d61b47 -> 7f4f7b918bc4

UPDATE approval_orders ao JOIN (SELECT id, ROW_NUMBER() OVER (  PARTITION BY order_type, ref_id ORDER BY id) AS rn   FROM approval_orders   WHERE (order_type, ref_id) IN (    SELECT order_type, ref_id FROM approval_orders     GROUP BY order_type, ref_id     HAVING COUNT(*) > COUNT(DISTINCT version_no))) t ON ao.id = t.id SET ao.version_no = t.rn;

SET @uk_exists := (SELECT COUNT(*) FROM information_schema.TABLE_CONSTRAINTS WHERE CONSTRAINT_SCHEMA = DATABASE() AND TABLE_NAME = 'approval_orders' AND CONSTRAINT_NAME = 'uk_approval_orders_order_type_ref_version');

SET @ddl := IF(@uk_exists = 0, 'ALTER TABLE approval_orders ADD CONSTRAINT uk_approval_orders_order_type_ref_version UNIQUE (order_type, ref_id, version_no)', 'DO 0');

PREPARE stmt FROM @ddl;

EXECUTE stmt;

DEALLOCATE PREPARE stmt;

UPDATE alembic_version SET version_num='7f4f7b918bc4' WHERE alembic_version.version_num = 'f3a8c2d61b47';