Hello 2013/2/2 Tom Lane <t...@sss.pgh.pa.us>: > 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.
updated version Regards Pavel > > regards, tom lane
gset_20130202.patch
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