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https://issues.apache.org/jira/browse/SPARK-44616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Grove updated SPARK-44616:
-------------------------------
Description:
PR https://github.com/apache/spark/pull/39555 changed DeferredObject to no
longer contain a function, and instead contains a value. This removes the
deferred evaluation capability and means that HiveGenericUDF implementations
can no longer short-circuit the evaluation of their arguments, which could be a
performance issue for some users.
Here is a relevant javadoc comment from the Hive source for DeferredObject:
{{{
/**
* A Defered Object allows us to do lazy-evaluation and short-circuiting.
* GenericUDF use DeferedObject to pass arguments.
*/
public static interface DeferredObject {
}}}
was:PR https://github.com/apache/spark/pull/39555 changed DeferredObject to
no longer contain a function, and instead contains a value. This removes the
deferred evaluation capability and means that HiveGenericUDF implementations
can no longer short-circuit the evaluation of their arguments, which could be a
performance issue for some users.
> Hive Generic UDF support no longer supports short-circuiting of argument
> evaluation
> -----------------------------------------------------------------------------------
>
> Key: SPARK-44616
> URL: https://issues.apache.org/jira/browse/SPARK-44616
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.5.0
> Reporter: Andy Grove
> Priority: Major
>
> PR https://github.com/apache/spark/pull/39555 changed DeferredObject to no
> longer contain a function, and instead contains a value. This removes the
> deferred evaluation capability and means that HiveGenericUDF implementations
> can no longer short-circuit the evaluation of their arguments, which could be
> a performance issue for some users.
> Here is a relevant javadoc comment from the Hive source for DeferredObject:
> {{{
> /**
> * A Defered Object allows us to do lazy-evaluation and short-circuiting.
> * GenericUDF use DeferedObject to pass arguments.
> */
> public static interface DeferredObject {
> }}}
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