优化

deploy/sql/migrations/cn/baiyue_firstleg/V1__align_schema_baseline.sql

@@ -8,10 +8,14 @@ SET NAMES utf8mb4;
 
 SET @guard = IF(
   EXISTS (SELECT 1 FROM fl_dropship_pallet WHERE pallet_no IS NULL LIMIT 1),
-  'SIGNAL SQLSTATE ''45000'' SET MESSAGE_TEXT = ''fl_dropship_pallet.pallet_no contains NULL''',
+  'SELECT 1 FROM migration_blocked_firstleg_pallet_no_contains_null',
   'SELECT 1'
 );
 PREPARE stmt FROM @guard; EXECUTE stmt; DEALLOCATE PREPARE stmt;
 
-ALTER TABLE fl_dropship_pallet
-  MODIFY COLUMN pallet_no varchar(32) NOT NULL COMMENT '现场扫描的系统DP托盘码';
+SET @ddl = IF(
+  EXISTS (SELECT 1 FROM information_schema.columns WHERE table_schema = DATABASE() AND table_name = 'fl_dropship_pallet' AND column_name = 'pallet_no' AND (column_type <> 'varchar(32)' OR is_nullable <> 'NO')),
+  'ALTER TABLE fl_dropship_pallet MODIFY COLUMN pallet_no varchar(32) NOT NULL COMMENT ''现场扫描的系统DP托盘码''',
+  'SELECT 1'
+);
+PREPARE stmt FROM @ddl; EXECUTE stmt; DEALLOCATE PREPARE stmt;