SET @current_schema := DATABASE();

SET @add_voice_room_rocket_preview_url_sql := IF(
  NOT EXISTS (
    SELECT 1
    FROM information_schema.columns
    WHERE table_schema = @current_schema
      AND table_name = 'voice_room_rocket_level_config'
      AND column_name = 'preview_rocket_url'
  ),
  'ALTER TABLE `voice_room_rocket_level_config` ADD COLUMN `preview_rocket_url` varchar(512) DEFAULT NULL COMMENT ''预览火箭资源URL'' AFTER `shake_threshold_percent`',
  'SELECT 1'
);
PREPARE add_voice_room_rocket_preview_url_stmt FROM @add_voice_room_rocket_preview_url_sql;
EXECUTE add_voice_room_rocket_preview_url_stmt;
DEALLOCATE PREPARE add_voice_room_rocket_preview_url_stmt;