-- t_auto_trigger 规则名与优先级（可重复执行）
-- 在 OMS 业务库执行：mysql -h<host> -u<user> -p<db> < migrate_t_auto_trigger_rule_meta.sql

SET @db = DATABASE();

SET @exist := (SELECT COUNT(*) FROM information_schema.COLUMNS
    WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 't_auto_trigger' AND COLUMN_NAME = 'RuleName');
SET @sql := IF(@exist = 0,
    'ALTER TABLE `t_auto_trigger` ADD COLUMN `RuleName` VARCHAR(128) NULL COMMENT ''规则名称'' AFTER `Status`',
    'SELECT ''skip RuleName''');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

SET @exist := (SELECT COUNT(*) FROM information_schema.COLUMNS
    WHERE TABLE_SCHEMA = @db AND TABLE_NAME = 't_auto_trigger' AND COLUMN_NAME = 'Priority');
SET @sql := IF(@exist = 0,
    'ALTER TABLE `t_auto_trigger` ADD COLUMN `Priority` INT NOT NULL DEFAULT 100 COMMENT ''优先级，数值越小越先执行'' AFTER `RuleName`',
    'SELECT ''skip Priority''');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;