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https://issues.apache.org/jira/browse/HIVE-2506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13128613#comment-13128613
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[email protected] commented on HIVE-2506:
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/2400/
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(Updated 2011-10-17 03:03:48.523189)
Review request for Carl Steinbach, John Sichi and Igor Kabiljo.
Changes
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Fix an errant comment.
Summary
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ConstantOIs are awesome in UDFs, let's also support them in UDAFs. Some side
things that needed to happen to make this a reality:
1.) The GenericUDAFParameterInfo was changed to also support ObjectInspectors
(and store things in OI rather than TypeInfo format). This ensures that info
is most flexibly available to the UDAF, and UDAFs no longer need to understand
how to manipulate both TI and OI.
2.) SemanticAnalyzer and FunctionRegistry was changed to use OIs in the node
creation process rather than converting back and forth between TI and OI.
3.) AbstractGenericUDAFResolver now overrides the TI method so that subclasses
of this don't have to implement both methods.
4.) Changed PercentileApprox as an example of what can be done with the new
interface. Things are simplified since the number of buckets and quantiles are
known in advance.
This addresses bug HIVE-2506.
https://issues.apache.org/jira/browse/HIVE-2506
Diffs (updated)
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ql/src/java/org/apache/hadoop/hive/ql/exec/FunctionRegistry.java cbbfffb
ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java 1110cfa
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/AbstractGenericUDAFResolver.java
766e473
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFParameterInfo.java
04cfc28
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFPercentileApprox.java
678607b
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/SimpleGenericUDAFParameterInfo.java
3277b98
Diff: https://reviews.apache.org/r/2400/diff
Testing
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udaf_percentile_approx.q
Thanks,
Jonathan
> Get ConstantObjectInspectors working in UDAFs
> ---------------------------------------------
>
> Key: HIVE-2506
> URL: https://issues.apache.org/jira/browse/HIVE-2506
> Project: Hive
> Issue Type: Improvement
> Reporter: Jonathan Chang
> Assignee: Jonathan Chang
> Attachments: HIVE-2506.patch
>
>
> ConstantObjectInspectors seem to do the right thing for UDFs, but don't work
> yet for UDAFs, in part of the complex getEvaluator path which converts back
> and forth between TypeInfo and ObjectInspectors. We should add an interface
> so that UDAFs can operate entirely on ObjectInspectors and expose
> constantness to these UDAFs.
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