Fix regex_fixed_prefix() to cope reasonably well with regex patterns of the
form '^(foo)$'. Before, these could never be optimized into indexscans.
The recent changes to make psql and pg_dump generate such patterns (for \d
commands and -t and related switches, respectively) therefore represented
a big performance hit for people with large pg_class catalogs, as seen in
recent gripe from Erik Jones. While at it, be more paranoid about
case-sensitivity checking in multibyte encodings, and fix some other
corner cases in which a regex might be interpreted too liberally.
regexp.c (r1.66 -> r1.67)
selfuncs.c (r1.216 -> r1.217)
builtins.h (r1.283 -> r1.284)
pgsql-committers by date
|Next:||From: Tom Lane||Date: 2007-01-03 22:39:35|
|Subject: pgsql: Fix regex_fixed_prefix() to cope reasonably well with regex |
|Previous:||From: Bruce Momjian||Date: 2007-01-03 22:05:00|
|Subject: pgsql: Update pow() tests to check for both errno==EDOM _and_ |