增加分区功能

bms-back/sql/price/zone_country_code_alter.sql

@@ -0,0 +1,16 @@
+-- Add country_code to existing prc_zone (skip if re-running full zone_country.sql)
+-- charset: utf8mb4
+
+ALTER TABLE prc_zone
+  ADD COLUMN country_code VARCHAR(10) NULL COMMENT 'ISO2 country code from bms_region' AFTER region_id;
+
+UPDATE prc_zone z
+INNER JOIN bms_region r ON r.region_id = z.region_id
+SET z.country_code = r.country_code_2
+WHERE z.country_code IS NULL OR z.country_code = '';
+
+ALTER TABLE prc_zone
+  MODIFY COLUMN country_code VARCHAR(10) NOT NULL COMMENT 'ISO2 country code from bms_region';
+
+ALTER TABLE prc_zone
+  ADD INDEX idx_zone_country_code (country_code);