On 2013-09-13 19:20:11 -0700, Kevin Grittner wrote: > Andres Freund <and...@2ndquadrant.com> wrote: > > > Not one that's dependendant on padding bytes, null bitmaps that > > can or cannot be present and such. > > Can you provide an example of where that's an issue with this > patch?
I haven't yet tested your patch, but what I am talking about is that e.g.: SELECT (ARRAY[1,2,3,NULL])[1:3] = ARRAY[1,2,3]; obviously should be true. But both arrays don't have the same binary representation since the former has a null bitmap, the latter not. So, if you had a composite type like (int4[]) and would compare that without invoking operators you'd return something false in some cases because of the null bitmaps. Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
