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Hi,
Trying to identify last modified (updated or inserted) rows in a table, I
thought I could use xmin.
I tried is to get some lines sorted by xmin.
When doing it on a slonified database, I had no problem getting these lines.
But, trying the same query on a non slonified DB, I got an error, as there is
no ordering operator for xid.
I think that in the slon case, the query uses the implicit cast xid->xxid, and
then the operator to sort xxid.
What would be the best way to get last modified rows?
What I tried :
db=# select id_table, date_table, code_table from tb_table order by xmin desc
limit 10;
ERROR: could not identify an ordering operator for type xid
ASTUCE : Use an explicit ordering operator or modify the query.
Thanks in advance.
Best regards,
- --
Stéphane Schildknecht
PostgreSQLFr - http://www.postgresql.fr
Dalibo - http://www.dalibo.com
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