From: Tom Lane <tgl@sss.pgh.pa.us>
To: Daniel Ordobas Bortolas <bortolas@inf.UFSM.br>
Cc: pgsql-sql@postgresql.org
Subject: Re: simple problem
Date: Wed, 06 Mar 2002 15:06:39 -0500
Message-ID: <25416.1015445199@sss.pgh.pa.us> (raw)
In-Reply-To: <20020306150845.39034.qmail@inf.ufsm.br>
References: <20020306150845.39034.qmail@inf.ufsm.br>
"Daniel Ordobas Bortolas" <bortolas@inf.UFSM.br> writes:
> -->create table loco( id_loco int4 not null, primary key (id_loco), check(
> (select count(*) from loco ) < 3 ) );
> ->insert into loco values(1);
> the result is: ERROR: ExecEvalExpr: unknown expression type 108
Subselects aren't supported in check constraints (and if you were
running a version newer than 7.0.*, it would've told you so ...)
Possibly you could do what you want with a trigger function.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, bortolas@inf.UFSM.br
Subject: Re: simple problem
In-Reply-To: <25416.1015445199@sss.pgh.pa.us>
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