MBO Performance Tip N.5 - Avoid using setQbe method, use setWhere instead

This entry is part of the Java MBO performance optimization golden rules series.

The MboSet.setQbe() method is designed to be used to build filters from the user interface. Using the MboSet.setQbe() method will automatically add jolly characters in text searches preventing the database server to be able to use indexes.
For example let's look at the following code snippet.

MboSetRemote assetMboSet = session.getMboSet("ASSET");
assetMboSet.setQbe("ASSETNUM", "1000");

This tells the TPAE server to execute an SQL query like this:

SELECT * FROM asset WHERE assetnum LIKE '%1000%'

This will lead to an inefficient table scan.
Therefore, where conditions on a MboSet should be set using the setWhere() method unless you explicitly need the functionality provided by setQbe().