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https://issues.apache.org/jira/browse/HIVE-4963?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phabricator updated HIVE-4963:
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Attachment: HIVE-4963.D12279.2.patch
hbutani updated the revision "HIVE-4963 [jira] Support in memory PTF
partitions".
- Merge remote-tracking branch 'origin' into HIVE-4963-2
- update RowContainer based on template parameter change from Row to ROW
Reviewers: JIRA, ashutoshc
REVISION DETAIL
https://reviews.facebook.net/D12279
CHANGE SINCE LAST DIFF
https://reviews.facebook.net/D12279?vs=37983&id=38391#toc
AFFECTED FILES
ql/src/java/org/apache/hadoop/hive/ql/exec/PTFOperator.java
ql/src/java/org/apache/hadoop/hive/ql/exec/PTFPartition.java
ql/src/java/org/apache/hadoop/hive/ql/exec/PTFPersistence.java
ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/PTFRowContainer.java
ql/src/java/org/apache/hadoop/hive/ql/exec/persistence/RowContainer.java
ql/src/java/org/apache/hadoop/hive/ql/parse/PTFTranslator.java
ql/src/java/org/apache/hadoop/hive/ql/plan/PTFDesc.java
ql/src/java/org/apache/hadoop/hive/ql/plan/PTFDeserializer.java
ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/TableFunctionEvaluator.java
ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/TableFunctionResolver.java
ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/WindowingTableFunction.java
To: JIRA, ashutoshc, hbutani
> Support in memory PTF partitions
> --------------------------------
>
> Key: HIVE-4963
> URL: https://issues.apache.org/jira/browse/HIVE-4963
> Project: Hive
> Issue Type: Bug
> Components: PTF-Windowing
> Reporter: Harish Butani
> Attachments: HIVE-4963.D11955.1.patch, HIVE-4963.D12279.1.patch,
> HIVE-4963.D12279.2.patch, PTFRowContainer.patch
>
>
> PTF partitions apply the defensive mode of assuming that partitions will not
> fit in memory. Because of this there is a significant deserialization
> overhead when accessing elements.
> Allow the user to specify that there is enough memory to hold partitions
> through a 'hive.ptf.partition.fits.in.mem' option.
> Savings depends on partition size and in case of windowing the number of
> UDAFs and the window ranges. For eg for the following (admittedly extreme)
> case the PTFOperator exec times went from 39 secs to 8 secs.
>
> {noformat}
> select t, s, i, b, f, d,
> min(t) over(partition by 1 rows between unbounded preceding and current row),
> min(s) over(partition by 1 rows between unbounded preceding and current row),
> min(i) over(partition by 1 rows between unbounded preceding and current row),
> min(b) over(partition by 1 rows between unbounded preceding and current row)
> from over10k
> {noformat}
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