Tom Lane schrieb: > Michael Enke <michael.enke@xxxxxxxxxxxxxxxxxx> writes: >> I updated pg_converion to set the condefault=false where I need it. > > Why are you needing to replace an existing default conversion? > Do we have a bug in it? No, not a bug. But I need CP852 encoding conversion. Maybe you can take a look at http://archives.postgresql.org/pgsql-general/2008-05/msg00185.php and give your comment. Is the CREATE CONVERSION only for the case that there is a bug in existing default conversions? ;-) >> pg_dumpall does NOT write that table out and therefore it is not possible to restore, this update get lost. > > pg_dump does not (and shouldn't) dump system-defined objects. It has > no way to know that you modified the definition of such an object. > >> Why can not the "CREATE DEFAULT CONVERSION ..." >> a) return with an error if there is another default conversion existing or > > AFAICS it does. You can try with attached library: CREATE FUNCTION utf82cp852(integer,integer,cstring,internal,integer) RETURNS void AS '/tmp/libencodings' LANGUAGE 'C'; CREATE FUNCTION cp8522utf8(integer,integer,cstring,internal,integer) RETURNS void AS '/tmp/libencodings' LANGUAGE 'C'; CREATE DEFAULT CONVERSION utf82cp852 FOR 'UNICODE' TO 'LATIN2' FROM utf82cp852; CREATE DEFAULT CONVERSION cp8522utf8 FOR 'LATIN2' TO 'UNICODE' FROM cp8522utf8; It doesn't complain but it also is not the encoding used now since utf8_to_iso_8859_2 / iso_8859_2_utf8 has still condefault=true. If I now set condefault to false, my conversion function is used. Regards, Michael -- Wincor Nixdorf International GmbH Sitz der Gesellschaft: Paderborn Registergericht Paderborn HRB 3507 Geschäftsführer: Eckard Heidloff (Vorsitzender), Stefan Auerbach, Dr. Jürgen Wunram Vorsitzender des Aufsichtsrats: Karl-Heinz Stiller Steuernummer: 339/5884/0020 - Ust-ID Nr.: DE812927716 - WEEE-Reg.-Nr. DE44477193 Diese E-Mail enthält vertrauliche Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese E-Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser E-Mail ist nicht gestattet. This e-mail may contain confidential information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden.
Attachment:
libencodings.so
Description: application/sharedlib
