[SNAP-2158] DataFrame update API. #941
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added 4 commits
January 30, 2018 11:56
This rdd uses a pooled connection. Application has to pass the configuration.
added 4 commits
February 6, 2018 15:31
In case of empty build side map, further scanning is not done.
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Changes proposed in this pull request
Added update API to DataFrame.
Both row and column tables can be updated df.write.update("table")
Also added a utility method to get JDBC data frames using pooled connection settings. Otherwise, JDBC relation will create a new connection every time, which is very expensive in streaming applications.
Added a check in SnappyHashJoin to skip scanning of tables, if the built map size is zero. This is helpful if some join operation is happening in an empty dataframe.
Patch testing
pre-checkin
ReleaseNotes.txt changes
Na
Other PRs
NA