Pavel Stehule <pavel.stehule@gmail.com> writes:
> 2013/2/2 Tom Lane <tgl@sss.pgh.pa.us>:
>> Shigeru Hanada <shigeru.hanada@gmail.com> writes:
>>> +1 for a). If users want to determine whether the result was NULL, or
>>> want to use substitute string for NULL result, they can use coalesce
>>> in SELECT clause. Anyway the feature should be documented clearly.
>> Yeah, I was considering that one too. Let's do it that way.
> updated version
Applied with corrections.
regards, tom lane
