-- Qihu-AIFlow 全局默认模型功能（幂等）
USE aiflow;

-- 添加 is_default 列到 models 表
SET @dbname = DATABASE();
SET @tablename = 'models';
SET @columnname = 'is_default';
SET @prepared_stmt = (SELECT IF(
    (SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = @dbname AND TABLE_NAME = @tablename AND COLUMN_NAME = @columnname) = 0,
    CONCAT('ALTER TABLE ', @tablename, ' ADD COLUMN ', @columnname, ' TINYINT(1) DEFAULT 0 COMMENT ''全局默认模型'''),
    CONCAT('SELECT ''Column ', @columnname, ' already exists''')
));
PREPARE stmt FROM @prepared_stmt;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;