-- 装货段、送货段增加「是否同市」。同市的易制毒段只校验、扣减购买证。
-- MySQL 5.7。可重复执行。历史数据默认 0，仍按购买证和运输证同时校验。
SET NAMES utf8mb4;

SET @schema_name = DATABASE();

SET @load_exists = (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @schema_name AND TABLE_NAME = 'pl_plan_load' AND COLUMN_NAME = 'same_city'
);
SET @load_sql = IF(
  @load_exists = 0,
  'ALTER TABLE pl_plan_load ADD COLUMN same_city tinyint NOT NULL DEFAULT 0 COMMENT ''是否同市 0-否 1-是；为 1 时本段易制毒只校验购买证'' AFTER dibang_direction',
  'SELECT 1'
);
PREPARE load_stmt FROM @load_sql;
EXECUTE load_stmt;
DEALLOCATE PREPARE load_stmt;

SET @delivery_exists = (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @schema_name AND TABLE_NAME = 'pl_plan_delivery' AND COLUMN_NAME = 'same_city'
);
SET @delivery_sql = IF(
  @delivery_exists = 0,
  'ALTER TABLE pl_plan_delivery ADD COLUMN same_city tinyint NOT NULL DEFAULT 0 COMMENT ''是否同市 0-否 1-是；为 1 时本段易制毒只校验购买证'' AFTER dibang_direction',
  'SELECT 1'
);
PREPARE delivery_stmt FROM @delivery_sql;
EXECUTE delivery_stmt;
DEALLOCATE PREPARE delivery_stmt;