Saturday, February 2, 2008

joining an existing transaction

an EJB method has 6 transaction attributes (described in tref). A basic concept is "joining a transaction". It means "joining an existing transaction".

This joining concept is important not only in EJB.

According to the DB2 trainer, DB2 triggers and functions JOIN transactions, whereas sproc often CONTROL transactions. Let's explore

* a function is used in a single select.
* a trigger is invoked as part of a CUD

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