pgsql: At the head of wchareq, length of (multibyte) character is

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От momjian@svr1.postgresql.org (Bruce Momjian)
Тема pgsql: At the head of wchareq, length of (multibyte) character is
Дата
Msg-id 20050525225934.191A052815@svr1.postgresql.org
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Log Message:
-----------
At the head of wchareq, length of (multibyte) character is compared by
using pg_mblen. Therefore, pg_mblen is executed many times, and it
becomes a bottleneck.

This patch makes a short cut, and reduces execution frequency of
pg_mblen by comparing the first byte first.

a_ogawa

Modified Files:
--------------
    pgsql/src/backend/utils/adt:
        like.c (r1.59 -> r1.60)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/like.c.diff?r1=1.59&r2=1.60)

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