How can I do a bulk update?

Question

Hi
In our BC4J application I need to perform a "bulk update", that is, I need to iterate over all the rows of a View and set one attribute on each one. Tracing the SQL session, I note that the BC4J framework is doing a select for update where pk = ... for each row. Is there something similar to the "executeQuery" view method, that does a "select for update"? something like an "executeQueryAndLockAllRows()?"
I'm using PESSIMISTIC locking mode.
Thanks,
Ramiro

Answer 1

Hi
In our BC4J application I need to perform a "bulk update", that is, I need to iterate over all the rows of a View and set one attribute on each one. Tracing the SQL session, I note that the BC4J framework is doing a select for update where pk = ... for each row. Is there something similar to the "executeQuery" view method, that does a "select for update"? something like an "executeQueryAndLockAllRows()?"You can use batch-update features on an entity for update if your entity does not contain any refresh-on-update flags and any large data types (lobs). See help on Batch Update in the Tuning panel of an entity wizard/editor.
It will still execute select..for..update but the network roundtrip will occur in a batch rather than one roundtrip for every row leading to a much faster batch-update performance.
I'm using PESSIMISTIC locking mode.
Thanks,
Ramiro