| From: | Peter Geoghegan <pg(at)heroku(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, 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 19:57:36 |
| Message-ID: | CAM3SWZQs3BhzLyE7FRhOvTObHNePiC5Ra9Kb=+AqG8YpjCt=WA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Nov 19, 2014 at 11:54 AM, Alvaro Herrera
<alvherre(at)2ndquadrant(dot)com> wrote:
> Peter Geoghegan wrote:
>> On Wed, Nov 19, 2014 at 11:34 AM, Alvaro Herrera
>> <alvherre(at)2ndquadrant(dot)com> wrote:
>> > 0 for a transposition, wow.
>>
>> Again, they're optimizing for short strings (git commands) only. There
>> just isn't that many transposition errors possible with a 4 character
>> string.
>
> If there's logic in your statement, I can't see it.
The point is that transposition errors should not have no cost. If git
did not have an absolute quality test of a distance of 6, which they
can only have because all git commands are terse, then you could
construct a counter example.
--
Peter Geoghegan
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