Hi,
On 21 December 2012 04:29, Charles Gomes <charlesrg@xxxxxxxxxxx> wrote:
> When I target the MASTER table on all the inserts and let
> the trigger decide what partition to choose from it takes 4 hours.
>
> If I target the partitioned table directly during the
> insert I can get 4 times better performance. It takes 1 hour.
Yes, that's my experience as well. Triggers are the slowest.
Performance of "DO INSTEAD" rule is close to direct inserts but rule
setup is complex (each partition needs one):
create or replace rule <master_table>_insert_<partition_name> as on
insert to <master_table>
where new.<part_column> >= ... and
new.<part_column> < ....
do instead
insert into <master_table>_<partition_name>
values (new.*)
The best is used to direct inserts (into partition) if you can.
--
Ondrej Ivanic
(http://www.linkedin.com/in/ondrejivanic)
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