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Oracle 11g Streams Implementer's Guide by Eric Yen, Ann L. R. McKinnell

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Apply process

We are over the hump and it's all downhill from here. From our previous image on Queues, we notice that we are now on the Target side of the Streams environment. On this side, we have a buffered queue and the Apply process. The queue on this side will be a secure queue that is the same kind as that on the Source. This secure queue (on the Target side) contains the LCRs sent over by the Propagation process.

At this point, the Apply process comes into the picture. The Apply process takes LCRs (or messages) from the secure queue and applies them to the Target database object, or hands it off to an Apply handler. An Apply handler is a user defined procedure that processes the LCR change. The user defined procedure takes a single LCR ...

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