| 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: | 2014-11-19 19:20:52 |
| Message-ID: | CAM3SWZSq4pyCGEyT7hquoQ_=qkQ7wB6syub88+Y=zE4q3gWQpQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Nov 19, 2014 at 11:13 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> Apparently what they're doing is charging 0 for a transposition (which
> we don't have as a separate concept), 2 for a substitution, 1 for an
> insertion, and 3 for a deletion, with the constraint that anything
> with a total distance of more than 6 isn't considered. And that does
> overall seem to give pretty good suggestions.
The git people know that no git command is longer than 4 or 5
characters. That doesn't apply to us. I certainly would not like to
have an absolute distance test of n characters.
--
Peter Geoghegan
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