-- 两个开关默认关闭，保留现有账号的短链处理方式。
SET @column_exists := (
    SELECT COUNT(*)
    FROM information_schema.columns
    WHERE table_schema = DATABASE()
      AND table_name = 'tk_pool'
      AND column_name = 'enable_general_link_parse_pool'
);

SET @sql := IF(
    @column_exists = 0,
    'ALTER TABLE tk_pool ADD COLUMN enable_general_link_parse_pool TINYINT(1) NOT NULL DEFAULT 0 COMMENT ''加入万能解析账号池''',
    'SELECT 1'
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

SET @column_exists := (
    SELECT COUNT(*)
    FROM information_schema.columns
    WHERE table_schema = DATABASE()
      AND table_name = 'tk_pool'
      AND column_name = 'use_general_link_parse_pool'
);

SET @sql := IF(
    @column_exists = 0,
    'ALTER TABLE tk_pool ADD COLUMN use_general_link_parse_pool TINYINT(1) NOT NULL DEFAULT 0 COMMENT ''使用万能解析账号池处理短链''',
    'SELECT 1'
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;