Re: Type of bare text strings

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Type of bare text strings
Date: 2006-06-08 16:14:39
Message-ID: 20060608161439.GC17421@surnet.cl
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

Alvaro Herrera wrote:
> Jim C. Nasby wrote:
> > What type are bare strings considered if they haven't been cast? I'm curious as
> > to how the first case is of size 5, and how the last case is 301...
> >
> > decibel=# select pg_column_size('test');
> > 5
>
> "unknown". This seems to be a cstring (i.e. length 5 considering the
> trailing \0)

Yup. This is handled by this code:

else if (typlen == -2)
{
/* cstring */
result = strlen(DatumGetCString(value)) + 1;
}

--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

In response to

Browse pgsql-hackers by date

  From Date Subject
Next Message Greg Stark 2006-06-08 16:19:49 Re: ADD/DROP INHERITS
Previous Message Joshua D. Drake 2006-06-08 16:13:33 Re: How to avoid transaction ID wrap