为什么chunksize参数在pandas.read\u sql\u查询中不起作用？

Question

我想在pd.read\u sql\u query（）中实现chunksize的使用，但是当我实现代码时，出现了一个意外的参数错误。不确定我是否遗漏了一些明显的东西

def readFromSQL(SQLSentence, chunksize = None):

    try:
        engine = sa.create_engine(engine_definition)
        return_value = pd.read_sql_query(SQLSentence, engine,
                                         chunksize = chunksize)

    except sa.exc.DBAPIError:
        sys.exit("Error (DBAPIError)")

    return(return_value)

pdvs = readFromSQL("SELECT GOOGLE.* \
                           ,creation_time \
                        FROM [dbo].[DM_SOURCE_GOOGLE_DETAILS] AS GOOGLE\
                        JOIN \
                        ( \
                            SELECT place_id \
                                ,max(datetime) AS datetime \
                                , min(datetime) AS creation_time \
                            FROM [dbo].[DM_SOURCE_GOOGLE_DETAILS] \
                            GROUP BY place_id \
                        )AS date_updated \
                        ON GOOGLE.datetime = date_updated.datetime \
                            AND GOOGLE.place_id = date_updated.place_id", chunksize = 5)

但是我得到了以下错误readFromSQL（）得到了一个意外的关键字参数'chunksize'