Re: Cast text to bytea

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От Godshall Michael
Тема Re: Cast text to bytea
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Msg-id A596FA3368757645AF862C701495CA0001B44A38@hor1mspmx01.gmachs.com
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Ответ на Cast text to bytea  (Alvar Freude <alvar@a-blast.org>)
Ответы Re: Cast text to bytea
Список pgsql-admin

Have you seen this?
http://www.postgresql.org/docs/current/static/datatype-binary.html

Maybe you need some backslashes?

-----Original Message-----
From: pgsql-admin-owner@postgresql.org
[mailto:pgsql-admin-owner@postgresql.org]On Behalf Of Alvar Freude
Sent: Tuesday, December 02, 2003 5:07 PM
To: pgsql-admin@postgresql.org
Subject: [ADMIN] Cast text to bytea

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Hi,

I want to change a column from text to bytea; since it seems that alter
table can't change the column type, i have to add a temporary column and
copy the data from the old one to the new, delete the old and rename the
new.

But it seems that Postgres can't cast text to bytea:

 > UPDATE forum_gtree SET gid2=gid::bytea;
 ERROR:  Cannot cast type text to bytea

How can I do this?

encode/decode seems to handle only bytea data:

  http://www.postgresql.org/docs/current/interactive/functions-string.html

Thanks && Ciao
  Alvar

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** Alvar C.H. Freude -- http://alvar.a-blast.org/
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