From: Stephan Szabo <sszabo@megazone.bigpanda.com>
To: Yasir Malik <ymalik@cs.stevens-tech.edu>
Cc: pgsql-sql@postgresql.org
Subject: Re: Addition and subtraction on BIT type
Date: Sun, 16 Nov 2003 21:40:45 -0800 (PST)
Message-ID: <20031116213918.P81284@megazone.bigpanda.com> (raw)
In-Reply-To: <Pine.SGI.4.58.0311162055350.144387@guinness.cs.stevens-tech.edu>
References: <Pine.SGI.4.58.0311161117410.129151@guinness.cs.stevens-tech.edu>
<Pine.SGI.4.58.0311162055350.144387@guinness.cs.stevens-tech.edu>
On Sun, 16 Nov 2003, Yasir Malik wrote:
> I think I am almost at a solution to my last question. I can do
> select int4(a) from test;
> to convert to an integer. So now addition and
> subtraction can be done between bit types. But how do I convert back to
> BIT type? If I do
> select bit(int4(b'1001'));
>
> I get the following message:
> ERROR: parser: parse error at or near "int4" at character 12
>
> Can anyone tell me why the bit function is not working? It's under the
> pg_catalog schema.
It's also the name of a type that takes a precision in parentheses, so
you'd have to say "bit"(...) with the quotes. As a note, I think
that's going to effectively return you a bit(32), so
sszabo=# select "bit"(int4(b'1001'));
bit
----------------------------------
00000000000000000000000000001001
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To: pgsql-sql@postgresql.org
Cc: sszabo@megazone.bigpanda.com, ymalik@cs.stevens-tech.edu
Subject: Re: Addition and subtraction on BIT type
In-Reply-To: <20031116213918.P81284@megazone.bigpanda.com>
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