Re: Bit string help, please

Hi Ed,

I tried exactly what you did and it works for me.
My postgres is 8.3.0 running on redhat advanced
server. This is what it told me:

prompt=# SELECT ('1' || repeat('0', 7))::bit varying;
varbit
----------
10000000
(1 row)

prompt=#

Regards,

Tena Sakai
tsakai(at)gallo(dot)ucsf(dot)edu

-----Original Message-----
From: pgsql-sql-owner(at)postgresql(dot)org on behalf of tyrrill_ed(at)emc(dot)com
Sent: Thu 3/6/2008 10:24 AM
To: dev(at)archonet(dot)com
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: [SQL] Bit string help, please

I tried this real quick at the psql command prompt, and unfortunately it
doesn't work:

mydb=# select ('1' || repeat('0',7))::bit varying;
ERROR: cannot cast type text to bit varying

I appreciate the try though. Any other ideas? I am using PostgreSQL
8.2.3.1. I don't know if that matters too much.

Thanks,
Ed

-----Original Message-----
From: Richard Huxton [mailto:dev(at)archonet(dot)com]
Sent: Thursday, March 06, 2008 12:14 AM
To: Tyrrill, Ed
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: [SQL] Bit string help, please

tyrrill_ed(at)emc(dot)com wrote:
>
> insert into table1 values( DEFAULT, B'1'::bit( n ) );
>
> Where n is one of the parameters to the PL/pgSQL function, but that
> doesn't work. PostgreSQL doesn't like having a variable for the bit
> string length. Does anyone have any ideas how I could achieve this?

Try casting from a string:
SELECT ('1' || repeat('0', n-1))::bit varying;

--
Richard Huxton
Archonet Ltd

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