| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Juriy Goloveshkin <juriy(at)avias(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: like and optimization |
| Date: | 2001-01-21 00:22:57 |
| Message-ID: | 5704.980036577@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Juriy Goloveshkin <juriy(at)avias(dot)com> writes:
> Hello, I didn't know pgsql-sources close,
> so I wrote this code just as example of idea.
> Can somebody review and make patch for pgsql?
AFAICT this only deals with the issue of single-byte characters that
sort in an order different from their numeric order. The existing
make_greater_string() code already deals with that case. Where it
falls down is cases where sorting is context-dependent (multi-pass
sort rules, digraphs, things like that). But I don't see anything
here that would make such cases work.
If you're trying to tell us that the 7.0.* code works correctly for
KOI8-R locale, we'd be glad to re-enable LIKE optimization for that
locale ...
regards, tom lane
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