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Asked: 2026-05-10T22:42:26+00:00

I have a webservice in java that receives a list of information to be

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I have a webservice in java that receives a list of information to be inserted or updated in a database. I don’t know which one is to insert or update.

Which one is the best approach to abtain better performance results:

  1. Iterate over the list(a object list, with the table pk on it), try to insert the entry on Database. If the insert failed, run a update

  2. Try to load the entry from database. if the results retrieved update, if not insert the entry.

  3. another option? tell me about it 🙂

In first calls, i believe that most of the entries will be new bd entries, but there will be a saturation point that most of the entries will be to update.

I’m talking about a DB table that could reach over 100 million entries in a mature form.

What will be your approach? Performance is my most important goal.

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1 Answer

  1. If your database supports MERGE, I would have thought that was most efficient (and treats all the data as a single set).

    See:

    http://www.oracle.com/technology/products/oracle9i/daily/Aug24.html

    https://web.archive.org/web/1/http://blogs.techrepublic%2ecom%2ecom/datacenter/?p=194

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