From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: magic constant -1 |
Date: | 2009-11-06 05:18:17 |
Message-ID: | 162867790911052118r855502erd950a8a914c0a5dc@mail.gmail.com |
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Lists: | pgsql-hackers |
2009/11/5 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
> Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
>> we use a value -1 as two values: a) unknown typmod, b) unknown
>> location. Can we substitute it by some better identifier?
>
>> Maybe: UnknownTmod, UnknownLoc ... UnspecTmd, UnspecLoc???
>
> Doesn't really seem worth the trouble, especially since the checks
> for "unspecified" are coded as negative/nonnegative rather than
> simple equality.
I worked on enhancing an area where typmod is used, and I had a small
problem - because it wasn't simply clean, where -1 is typmod or
location.
This should be an idea for enhancing and increasing code quality. -1
is probably last wide used magic constant in pg.
Pavel
>
> regards, tom lane
>
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