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https://reviews.apache.org/r/21168/
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Review request for hive and Ashutosh Chauhan.
Bugs: HIVE-6999
https://issues.apache.org/jira/browse/HIVE-6999
Repository: hive-git
Description
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There are a set of use cases where the Table Function can operate on a
Partition row by row or on a subset(window) of rows as it is being streamed to
it.
Windowing has couple of use cases of this:processing of Rank functions,
processing of Window Aggregations.
But this is a generic concept: any analysis that operates on an Ordered
partition maybe able to operate in Streaming mode.
This patch introduces streaming mode in PTFs and provides the mechanics to
handle PTF chains that contain both modes of PTFs.
Subsequent patches will introduce Streaming mode for Windowing.
Diffs
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ql/src/java/org/apache/hadoop/hive/ql/exec/FunctionRegistry.java 3bb8fa9
ql/src/java/org/apache/hadoop/hive/ql/exec/PTFOperator.java 4d314b7
ql/src/java/org/apache/hadoop/hive/ql/parse/PTFTranslator.java 34aebf0
ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/NoopStreaming.java PRE-CREATION
ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/NoopWithMapStreaming.java
PRE-CREATION
ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/TableFunctionEvaluator.java
1087bbf
ql/src/test/queries/clientpositive/ptf_streaming.q PRE-CREATION
ql/src/test/results/clientpositive/ptf_streaming.q.out PRE-CREATION
Diff: https://reviews.apache.org/r/21168/diff/
Testing
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added new tests
Thanks,
Harish Butani
