On Fri, Jul 25, 2014 at 10:56 AM, Sachini Jayasekara <[email protected]> wrote:
> Hi all, > > I have started working on the $subject. > > In current Siddhi implementation, for a partition query execution will be > carried out for each partition key separately and results will be directed > to a single stream. Ones the results of the partition query is sent to the > output stream there is no way to identify from which partition key the > event was generated and carry out operations to events generated by each > partition key separately. > > To overcome that we are introducing inner streams. Inner streams reside > inside a partition and they are only visible to the queries in that > partition. Inner stream allows carrying out same operation to results of > each partition key separately. If an inner stream is used as the output > stream of a query inside a partition, then events generated by each > partition key will be directed to a different stream with same stream > definition. > > As shown in the diagram for query1, stream A will get partitioned based on > a partition key and operations are carried out separately for each > partition key. Using an inner stream we can further carryout operations to > results of each partition key individually. Queries outside the partition > will not have any knowledge about stream B as it is an inner stream. > > > > +1 for the approach In the Siddhi Query syntax we are thing of calling inner-stream B as "#B" Regards Suho > Thanks > > > -- > > > > *Thanks & Regards, Sachini JayasekaraSoftware Engineer; **WSO2 Inc. * > > *lean . enterprise . middleware | http://wso2.com <http://wso2.com> * > -- *S. Suhothayan* Technical Lead & Team Lead of WSO2 Complex Event Processor *WSO2 Inc. *http://wso2.com * <http://wso2.com/>* lean . enterprise . middleware *cell: (+94) 779 756 757 | blog: http://suhothayan.blogspot.com/ <http://suhothayan.blogspot.com/>twitter: http://twitter.com/suhothayan <http://twitter.com/suhothayan> | linked-in: http://lk.linkedin.com/in/suhothayan <http://lk.linkedin.com/in/suhothayan>*
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