Re: Use UNKNOWN with PL/Perl spi_prepare()?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "David E(dot) Wheeler" <david(at)kineticode(dot)com>
Cc: PostgreSQL-development Hackers <pgsql-hackers(at)postgresql(dot)org>, Tim Bunce <Tim(dot)Bunce(at)pobox(dot)com>
Subject: Re: Use UNKNOWN with PL/Perl spi_prepare()?
Date: 2010-04-06 23:54:14
Message-ID: 1021.1270598054@sss.pgh.pa.us
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"David E. Wheeler" <david(at)kineticode(dot)com> writes:
> On Apr 6, 2010, at 4:40 PM, Tom Lane wrote:
>> Why would you think this is useful, considering that plperl has no
>> concept of SQL data types? Everything you could pass to
>> spi_exec_prepared is effectively text, no?

> try=# create or replace function try() returns void language plperl as $$
> spi_prepare('select abs($1)', 'text');
> $$;
> CREATE FUNCTION
> try=# select try();
> ERROR: error from Perl function "try": function abs(text) does not exist at line 2.

Well, yes; what's your point? How would you actually *use* this if you
had it? In particular what do you see yourself passing to the eventual
exec call?

regards, tom lane

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