Multicolumn update trigger

Hello

I want to have a track history of any data that has already been updated in a table. Say that table1 has 100 columns and to store historical data on change, I did another table track_table1 with columns: updated_column_name, old_data, you see, mod_time.

For this history of data storage, I need to write a trigger in which I will identify all columns whose value update and insert the name and column values in the track_table1 table.

What I'm doing now is to check each of the 100 new and old value column inside the trigger to know what columns have been updated. This increases the code and oracle must also check the values of each column 100 to find out if it is updated.

Is there a way where oracle itself can give a list of columns that have values updated by the update? While there is no need to check the values old and new in each column of the table.

I am using oracle 9i and 10 g databases.

-----------------------------------
Thank you very much in advance,
Kawa

If the update (')
end if;

Issue of doc!

But I know that nobody here ever reads documentation. That requires an effort!

-----------
Sybrand Bakker
Senior Oracle DBA

Tags: Database

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