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pgsql: Adjust string comparison so that only bitwise-equal strings are

From: tgl(at)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Adjust string comparison so that only bitwise-equal strings are
Date: 2005-12-22 22:50:00
Message-ID: 20051222225000.EB0439DCC7C@postgresql.org (view raw or flat)
Thread:
Lists: pgsql-committers
Log Message:
-----------
Adjust string comparison so that only bitwise-equal strings are considered
equal: if strcoll claims two strings are equal, check it with strcmp, and
sort according to strcmp if not identical.  This fixes inconsistent
behavior under glibc's hu_HU locale, and probably under some other locales
as well.  Also, take advantage of the now-well-defined behavior to speed up
texteq, textne, bpchareq, bpcharne: they may as well just do a bitwise
comparison and not bother with strcoll at all.

NOTE: affected databases may need to REINDEX indexes on text columns to be
sure they are self-consistent.

Modified Files:
--------------
    pgsql/src/backend/access/hash:
        hashfunc.c (r1.45 -> r1.46)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/hash/hashfunc.c.diff?r1=1.45&r2=1.46)
    pgsql/src/backend/utils/adt:
        varchar.c (r1.113 -> r1.114)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/varchar.c.diff?r1=1.113&r2=1.114)
        varlena.c (r1.141 -> r1.142)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/varlena.c.diff?r1=1.141&r2=1.142)

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Next:From: Tom LaneDate: 2005-12-22 22:50:07
Subject: pgsql: Adjust string comparison so that only bitwise-equal strings are
Previous:From: Bruce MomjianDate: 2005-12-22 21:45:30
Subject: pgsql: Update interval documenation to mention the storage system used.

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