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From: Paul M. Aoki <aoki@cs.berkeley.edu>
To: Eric P Dean <ericdean@iastate.edu>
Cc: postgres@postgres.Berkeley.EDU
Subject: Re: Searching on seperate words in an attribute
Date: Fri, 19 Aug 94 16:24:08 -0700
Message-ID: <199408192324.QAA15965@faerie.CS.Berkeley.EDU> (raw)
In-Reply-To: <9408161741.AA07392@pv081c.vincent.iastate.edu>

Eric P Dean <ericdean@iastate.edu> writes:
> If I have an attribute "artist = Gogh, Vincent van" I would like to
> be able to locate the instance by doing a "retrieve (xxx.all) where
> xxx.artist = "gogh"" or "retrieve (xxx.all) where xxx.artist =
> "VAN"". I would like searches to be case-insensitive and have some
> type of truncation feature.

there are some regular expression operators, such as the text regex
operator "~":

	where xxx.artist ~ "gogh"::text

or

	where xxx.artist ~ "[vV][aA][nN]"::text

if you want case insensitivity as opposed to using case-conscious
regular expressions, you would have to hack on the routines in
src/utils/adt/regexp.c.

as with most of the abstract data type stuff, the source is the
ultimate documentation for its behavior.
--
  Paul M. Aoki          |  University of California at Berkeley
  aoki@CS.Berkeley.EDU  |  Dept. of EECS, Computer Science Division (#1776) 
                        |  Berkeley, CA 94720-1776

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