-- Phase 3.3: MarketApp 增加 orchestration（Agent 多 Agent 编排图，JSON）
-- 幂等：仅当列不存在时才 ALTER
SET @db = 'aiflow';
SET @tbl = 'market_apps';
SET @col = 'orchestration';
SET @exists = (
    SELECT COUNT(*) FROM information_schema.columns
    WHERE table_schema = @db AND table_name = @tbl AND column_name = @col
);
SET @sql = IF(@exists = 0,
    "ALTER TABLE market_apps ADD COLUMN orchestration JSON NULL COMMENT 'Agent 多Agent编排图(3.3)'",
    'SELECT 1');
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;