我从Python调用了以下Impala查询，工作正常。
reference_ts = "2017-03-11 00:00:00"
q = """
select col_A, col_B, trunc(my_timestamp, 'D') as arrival_wk
from my_table
where my_timestamp < "%s"
""" % (reference_ts)
my_df = my_conn.exec_query(q)
然后，如果我稍微修改一下查询：
q1 = """
select col_A, col_B, trunc(my_timestamp, 'D') as arrival_wk
from my_table
where my_timestamp < "%s"
and col_C like 'AB%'
""" % (reference_ts)
my_df1 = my_conn.exec_query(q1)
我收到以下错误：
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-81-be1bb3b139a5> in <module>()
15
---> 16 """ % (reference_ts)
17
ValueError: unsupported format character ''' (0x27) at index 303
我猜Python与%中的col_C like 'AB%'混淆。我想知道是否有办法解决这个问题？谢谢！