varsql=$@"SELECT column_name,column_comment FROM information_schema.`COLUMNS` WHERE table_schema = @table_schema AND table_name = @table_name AND COLUMN_KEY <> 'PRI' ";
varsql=$@"SELECT column_name as Name,ifnull(column_comment,column_name) as comment FROM information_schema.`COLUMNS` WHERE table_schema = @table_schema AND table_name = @table_name AND COLUMN_KEY <> 'PRI' ";