Re: Bulkloading using COPY - ignore duplicates?

> However my application code is assuming that duplicate rows will
> simply be ignored (this is the case in Ingres, and I believe Oracle's
> bulkloader too). I propose modifying _bt_check_unique() in
> /backend/access/nbtree/nbtinsert.c to emit a NOTICE (rather than
> ERROR) elog() and return NULL (or appropriate) to the calling function
> if a duplicate key is detected and a 'COPY FROM' is in progress (add
> new parameter to flag this).

If you have a UNIQUE index on the table, just throwing away duplicates
seems really bad to me.  I know Ingres had that heapsort structure that
would remove duplicates.  That may be an interesting feature to add as
an operation that can be performed.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026