Sequence Skipping
- From: "Kenneth Naim" <kennethnaim@xxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 13 Jun 2012 15:32:22 -0400
I use the following two merge statements to load data into a dimension table
nightly. Every night the process runs the sequence (seq_procedure_key) gets
incremented by approximetly 57,000 values even though only 4-37 rows are
added. There are about 57,000 in the procedures table, Millions in the
medical_bill_detail tables and 17k in the cpt table. It seems one of the two
merge statements is wasting 1 sequence value for every row that does not get
inserted. I've tried searching metalink for bugs and so far have come up
empty. I am experiencing this in 10.2.0.3 prod environment and an 11.2.0.3
test environment. If this is expected behavior, any known workarounds. I
don't mind losing some values but 57k per day is too many. The load failed
as the column related to the sequence was defined as number(8) and the
sequence was into the 9th digit. BTW the cache on the sequence is 50.
merge into procedures a using
(select nvl(replace(cpt_code,' '),'None') cpt_code, cpt_descr
from cpt
where cpt_code is not null) b
on (a.cpt_code=b.cpt_code)
when matched
then update
set a.procedure_name=b.cpt_descr
where nvl(procedure_name,'~')<>nvl(b.cpt_descr,'~')
and cpt_descr is not null
when not matched
then insert (procedure_key, cpt_code, procedure_name)
values (seq_procedure_key.nextval, b.cpt_code, b.cpt_descr);
v_number_of_records:=sql%rowcount;
pkg_etl.p_end_process(v_process_id, v_number_of_records, null, false);
v_process_type_id:=129;
pkg_etl.p_start_process(v_process_type_id, load_id_in, null, null, null,
v_process_id);
merge into procedures a using
(select distinct replace(cpt_code,' ')
cpt_code, null cpt_descr
from wcis_dba.medical_bill_detail
where cpt_code is not null) b
on (a.cpt_code=b.cpt_code)
when not matched
then insert (procedure_key, cpt_code, procedure_name)
values (seq_procedure_key.nextval, b.cpt_code, b.cpt_descr);
Thanks,
Ken
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