Re: Extracting fields from 'infinity'::TIMESTAMP[TZ]

On 11/17/15 2:09 AM, Vitaly Burovoy wrote:
> I suppose behavior of monotonic values (julian, century, decade,
> isoyear, millennium and year) should be the same as for epoch (which
> obviously also monotonic value).
> Proposed patch has that behavior: ±infinity for epoch, julian,
> century, decade, isoyear, millennium and year; NULL for other fields.

What's the logic behind NULL here? Infinity is infinity, whether it's 
minutes or years. It's absolutely NOT the same thing as a NULL 
timestamp. I don't see why the normal constraint of minute < 60 should 
apply here; infinity isn't a normal number.

My specific fear is that now people will have to do a bunch of IF 
timestamp IS NOT NULL THEN ... to get the behavior they need.
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Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
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