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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Dario V. Fassi <software@sistemat.com.ar>
Cc: pgsql-jdbc@postgresql.org
Cc: pgsql-admin@postgresql.org
Subject: Re: Migrate postgres databases from SQL_ASCII to UNICODE encoding
Date: Sat, 17 Jul 2004 17:18:16 -0400
Message-ID: <16994.1090099096@sss.pgh.pa.us> (raw)
In-Reply-To: <40F98613.1060405@sistemat.com.ar>
References: <40F98613.1060405@sistemat.com.ar>

"Dario V. Fassi" <software@sistemat.com.ar> writes:
> A simple question, we need to migrate many (>20) postgres databases from 
> SQL_ASCII encoding to UNICODE encoding, over a 7.3.6 server.

SQL_ASCII is not an encoding (it's more like the absence of knowledge
about an encoding).  What is the data actually stored as?

> With  Dump/Restore , we get an error (Invalid Unicode) in any field that 
> has a 8 bits character coming from the SQL_ASCII , even setting the 
> client_encoding to WIN, ISO-8859-1,  and others encodings.

It might work to just UPDATE pg_database to set datencoding to the
correct value reflecting what you have actually stored.  You might then
need to REINDEX any indexes on textual columns, but I don't think
anything else would go wrong.

If you have a mishmash of different encodings in a single database, then
of course there is no simple solution; you are in for some pain while
you try to fix the data.

			regards, tom lane



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