Index of /stories/2007/09/07

      Name                    Last modified      Size  Description
Parent Directory - Employee.sql 2007-09-07 18:36 41K couchdb.rb 2007-09-07 18:36 1.6K demo.rb 2007-09-07 18:36 1.7K

The demo denormalizes this data and loads it into a CouchDB mock-up, defines a map-reduce view over the data, fetches one page of the output, updates a record, and refetches that same page. This demonstrates incremental and continuous updates of a view defined using both map and reduce functions.

To execute the demo, simply run ruby demo.rb.

A few notes: the evaluation of reduce could be defered until the first time the page is fetched. It could even be called on every GET. Either way, last modified/ETag data could be associated with each entry in the reduce_input data structure, and the results would play nice with HTTP's caching infrastructure...

In this mock-up deletes are not fleshed out, but essentially are the same as update, but with new_map=[].

Attribution: Employee.sql was extracted from here:

http://www.oracle.com/technology/tech/xml/xdk_sample/EmployeeInformationSample.html