Shigeru Hanada <shigeru.han...@gmail.com> writes:
> On Sat, Feb 2, 2013 at 7:30 PM, Pavel Stehule <pavel.steh...@gmail.com> wrote:
>> possible variants
>>
>> a) don't store NULL values - and remove existing variable when NULL
>> be assigned - it is probably best, but should be confusing for users
>> b) implement flag IS NULL - for variables
>> c) use nullPrint
>> d) use empty String
> +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.
regards, tom lane
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