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.

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