pyflink的where该如何使用？如何筛选？

[洗你的头]

尊敬的开发者您好：我想要在输出表中进行条件筛选，使用了where语句，结果不行
我的代码如下：
# 处理流程
t_env.from_path('mySource') \
    .select("pickup_datetime, dropoff_datetime, pickup_longitude, pickup_latitude, dropoff_longitude, dropoff_latitude, distance_meters(pickup_longitude, pickup_latitude) as O, distance_meters(dropoff_longitude, dropoff_latitude) as D, compute_duration_time(pickup_datetime, dropoff_datetime) as duration") \
&nbsp;&nbsp;&nbsp; .where("duration &gt;= 120 &amp;&amp; duration <= 3600") \
&nbsp;&nbsp;&nbsp; .select("pickup_datetime, dropoff_datetime, pickup_longitude, pickup_latitude, dropoff_longitude, dropoff_latitude, O, D, is_same_od(O, D) as same_od, duration") \
&nbsp;&nbsp;&nbsp; .where("same_od == 0") \
&nbsp;&nbsp;&nbsp; .select("pickup_datetime, dropoff_datetime, pickup_longitude, pickup_latitude, dropoff_longitude, dropoff_latitude, O, D, duration") \
&nbsp;&nbsp;&nbsp; .insert_into('mySink')
请问我这样使用where为什么不行呢？我应该如何去筛选出想要的结果呢？
（尝试了去掉where是可以正常运行的）