| From: | Peter Geoghegan <pg(at)heroku(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Abhijit Menon-Sen <ams(at)2ndquadrant(dot)com>, PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org>, Josh Berkus <josh(at)agliodbs(dot)com>, Ian Barwick <ian(at)2ndquadrant(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, Greg Stark <stark(at)mit(dot)edu>, Jim Nasby <jim(at)nasby(dot)net>, Albe Laurenz <laurenz(dot)albe(at)wien(dot)gv(dot)at> |
| Subject: | Re: Doing better at HINTing an appropriate column within errorMissingColumn() |
| Date: | 2014-12-08 17:43:57 |
| Message-ID: | CAM3SWZRPVR_W-Y4A3=RzYp8X3XkcrN+5jBVP-a_LNnD8zgN-ww@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Dec 8, 2014 at 9:31 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> Just that that's the case in which it seems useful to give a hint.
I think it's very possible that the wrong alias may be provided by the
user, and that we should consider that when providing a hint. Besides,
considering every visible RTE (while penalizing non-exact alias names
iff the user provided an alias name) is actually going to make bad
hints less likely, by increasing the number of equidistant low quality
matches in a way that swamps the mechanism into providing no actual
match at all. That's an important additional protection against low
quality matches.
What do other people think here?
--
Peter Geoghegan
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