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> The above is an operation that would not help me a lot, but a way of
> performing currval() without knowing the sequence name would be good.
You could do this with a function. Here is a quick one in SQL:
CREATE OR REPLACE FUNCTION seqname(NAME,NAME) RETURNS TEXT AS '
SELECT TRIM(BOTH \'\'\'\' FROM SUBSTRING(d.adsrc, \'\'\'.*\'\'\'))
FROM pg_catalog.pg_attrdef d, pg_catalog.pg_attribute a, pg_class c
WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef
AND c.relname = $1
AND c.oid = a.attrelid
AND a.attname = $2;
' LANGUAGE SQL;
Usage: SELECT nextval(seqname('tablename','colname'));
You might also want to simply keep a table of the sequence names
if you plan on doing this a lot, or make sure you name them in
a consistent and unsurprising manner.
- --
Greg Sabino Mullane greg(at)turnstep(dot)com
PGP Key: 0x14964AC8 200312022159
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