whether the updated records are new values
I'm using Oracle 11.2.0.4.
update of table tmp_tbl
the value of col1 = new_value
I want to know if there are ways to tell if an update was updated again, IE <>new_value col1 values by. I know that I can add where col1 <>new_value and base on sql % rowcount, I can understand if the update happen. However, due to the number of columns and the tables involved, we are looking for other ways.
Previously, we have accomplished this by using less and flashback query.
insert into tmp_tbl (ID, K1) values (1, "OLD_VALUE")
commit; / * Note, we do not now have, so we are not able to use flashback query and looking for other more easy solution other than comparing each column for all the table * /.
Update tmp_tbl
the value of col1 = new_value
where id = 1
Yvert returning in v_scn;
Select count (*) in the v_cnt of)
Select * from tmp_tbl from SNA v_scn where id = 1
less
Select * from tmp_tbl where id = 1)
IF v_cnt > 1
v_data_changed_flag = TRUE;
END IF:
Now, this must be done within the same transaction, so there is no commit. It seems that the flashback query access only committed data, so we couldn't use flashback queries.
Thanks in advance.
Post edited by: spur230
If you just want to know some updated column, but not necessarily who, you can store a checksum for each line and check in a trigger, maybe?
OWA_OPT_LOCK
http://blog.sydoracle.com/2011/06/check-summing-table-row.html
If you need to know what columns have been updated, you will have to do a hash as they show here.
Tags: Database
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t
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/
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---- -- -------------------- --------------------
1001 T2 MAY 12, 2013 16:11:12 GRACIE
1002 T2 12 APRIL 2013 13:04:12 AMY
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Post edited by: 3000640
If I understand correctly, something like:
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4 union double all the
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6 to_date (July 29, 2015 09:03 ', 'dd.mm.yyyy hh24')
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14 double)
15 select a.id help, a.phone1 aphone1, a.phone2 aphone2,
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tablea 21) a
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26 on a.phone1 = b.phone1 and
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28 a.rn = b.rn;
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1 451923456789 541969432045 July 29, 2015 09:01 1 451923456789 541969432045 July 29, 2015 09:04
2 451923456789 541969432045 July 29, 2015 09:03 2 451923456789 541969432045 July 29, 2015 09:05
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