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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Opinion on duplicate values
I'd do it based on which is more likely to succeed. That will give you the best performance. Also, I think there's some new DML in Oracle9i that combines insert/update into one statement.
Marc Perkowitz
MTP Systems Consulting
In a message dated 2/6/2001 3:43:09 PM Central Standard Time, kimberly.smith_at_gmd.fujitsu.com writes:
<< There is a coder here who has a lot of code that goes like this: PROCEDURE fsf IS
It is quite a legitimate thing that there could be duplicates because of the fact that data is being read out of files, etc. I do not know if its the norm or the unusual.
If I was coding it and I new there was a possibility of duplicates and I either did not want to insert it or wanted to update the record instead I would check the database first via a SELECT and then base my code on what got returned.
Is one really any better then the other. I am kind of against letting ORA errors being raised on purpose. Its one thing if something goes wrong but this is expected. Which would be harder on the database? They both have to get the data from disk (or memory as the case may be).
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