Re: WIP: extensible enums
Andrew Dunstan <andrew@dunslane.net>
From: Andrew Dunstan <andrew@dunslane.net>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Dean Rasheed <dean.a.rasheed@gmail.com>, Robert Haas <robertmhaas@gmail.com>, pgsql-hackers@postgresql.org
Date: 2010-10-17T15:35:24Z
Lists: pgsql-hackers
On 10/17/2010 10:38 AM, Tom Lane wrote: > Andrew Dunstan<andrew@dunslane.net> writes: >> On 10/17/2010 05:30 AM, Dean Rasheed wrote: >>> I just thought of another corner case, which can lead to a crash. The >>> comparison code assumes that the number of elements in the enumeration >>> is constant during a query, but that's not necessarily the case. >>> ... >>> Of course that's a pathalogical example, but we should protect against >>> it, preferrably without compromising performance in more normal cases. >> Yeah, good point. But how do we manage that? > Why is it crashing? I can see that this sort of thing might lead to > nonsensical answers, but a crash is harder to understand. > > regards, tom "haven't read the patch" lane Heh. I've been deep in buildfarm work, but I'll look at this now to see what I can find. cheers andrew