From: Tom Lane <tgl@sss.pgh.pa.us>
To: Bryan White <bryan@arcamax.com>
Cc: pgsql-sql@hub.org
Cc: pgsql-hackers@postgreSQL.org
Subject: Re: [SQL] Functional Indexes
Date: Sat, 06 Feb 1999 12:27:47 -0500
Message-ID: <20086.918322067@sss.pgh.pa.us> (raw)
In-Reply-To: <199902060400.XAA31039@hub.org>
"Bryan White" <bryan@arcamax.com> writes:
> The documentation for CREATE INDEX implies that functions are allowed in
> index definitions but when I execute:
> create unique index idxtest on customer (lower(email));
> the result is:
> ERROR: DefineIndex: (null) class not found
> Should this work? Do I have the syntax wrong?
I tried this wih 6.4.2 and found that it was only accepted if I
explicitly identified which index operator class to use:
play=> create table customer (email text);
CREATE
play=> create unique index idxtest on customer (lower(email));
ERROR: DefineIndex: class not found
play=> create unique index idxtest on customer (lower(email) text_ops);
CREATE
play=>
That'll do as a workaround for Bryan, but isn't this a bug? Surely
the system ought to know what type the result of lower() is...
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, bryan@arcamax.com, pgsql-sql@hub.org, pgsql-hackers@postgreSQL.org
Subject: Re: [SQL] Functional Indexes
In-Reply-To: <20086.918322067@sss.pgh.pa.us>
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