-- prc_order_bill: income_total + pay_total
SET NAMES utf8mb4;

SET @db := DATABASE();

SET @has_income := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_order_bill' AND COLUMN_NAME = 'income_total'
);
SET @has_payable := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_order_bill' AND COLUMN_NAME = 'payable_total'
);
SET @sql := IF(@has_income = 0 AND @has_payable > 0,
  'ALTER TABLE prc_order_bill CHANGE COLUMN payable_total income_total DECIMAL(10,2) DEFAULT NULL COMMENT \'应收总额\'',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @has_income2 := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_order_bill' AND COLUMN_NAME = 'income_total'
);
SET @sql := IF(@has_income2 = 0,
  'ALTER TABLE prc_order_bill ADD COLUMN income_total DECIMAL(10,2) DEFAULT NULL COMMENT \'应收总额\' AFTER surcharge_amount',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @has_pay := (
  SELECT COUNT(*) FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 'prc_order_bill' AND COLUMN_NAME = 'pay_total'
);
SET @sql := IF(@has_pay = 0,
  'ALTER TABLE prc_order_bill ADD COLUMN pay_total DECIMAL(10,2) DEFAULT NULL COMMENT \'应付总额\' AFTER income_total',
  'SELECT 1');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;