| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Nikita Glukhov <n(dot)gluhov(at)postgrespro(dot)ru> |
| Cc: | Filip Rembiałkowski <filip(dot)rembialkowski(at)gmail(dot)com>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>, Oleg Bartunov <obartunov(at)postgrespro(dot)ru>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Teodor Sigaev <teodor(at)sigaev(dot)ru> |
| Subject: | Re: fix for BUG #3720: wrong results at using ltree |
| Date: | 2020-03-30 22:12:42 |
| Message-ID: | 3843.1585606362@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
I wrote:
> I dunno, that doesn't really seem clearer to me (although some of it
> might be that you expended no effort on making the comments match
> the new code logic).
... although looking closer, this formulation does have one very nice
advantage: for the typical non-star case with high = low = 1, the
only recursive call is a tail recursion, so it ought to consume less
stack space than what I wrote.
Let me see what I can do with the comments.
regards, tom lane
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