From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Aren't lseg_eq and lseg_ne broken? |
Date: | 2002-11-29 18:03:34 |
Message-ID: | 200211291803.gATI3Yn26305@candle.pha.pa.us |
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Lists: | pgsql-hackers |
Tom Lane wrote:
> By chance I just noticed that lseg equality is coded as
>
> Datum
> lseg_eq(PG_FUNCTION_ARGS)
> {
> LSEG *l1 = PG_GETARG_LSEG_P(0);
> LSEG *l2 = PG_GETARG_LSEG_P(1);
>
> PG_RETURN_BOOL(FPeq(l1->p[0].x, l2->p[0].x) &&
> FPeq(l1->p[1].y, l2->p[1].y) &&
> FPeq(l1->p[0].x, l2->p[0].x) &&
> FPeq(l1->p[1].y, l2->p[1].y));
> }
>
> Surely this should be
>
> PG_RETURN_BOOL(FPeq(l1->p[0].x, l2->p[0].x) &&
> FPeq(l1->p[0].y, l2->p[0].y) &&
> FPeq(l1->p[1].x, l2->p[1].x) &&
> FPeq(l1->p[1].y, l2->p[1].y));
Yep, there could be no possible reason to double-test something like the
original code does. It must be wrong.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
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