GitHub user maropu opened a pull request:
https://github.com/apache/spark/pull/17028
[SPARK-19691][SQL] Fix ClassCastException when calculating percentile of
decimal column
## What changes were proposed in this pull request?
This pr fixed a class-cast exception below;
```
scala> spark.range(10).selectExpr("cast (id as decimal) as
x").selectExpr("percentile(x, 0.5)").collect()
java.lang.ClassCastException: org.apache.spark.sql.types.Decimal cannot be
cast to java.lang.Number
at
org.apache.spark.sql.catalyst.expressions.aggregate.Percentile.update(Percentile.scala:141)
at
org.apache.spark.sql.catalyst.expressions.aggregate.Percentile.update(Percentile.scala:58)
at
org.apache.spark.sql.catalyst.expressions.aggregate.TypedImperativeAggregate.update(interfaces.scala:514)
at
org.apache.spark.sql.execution.aggregate.AggregationIterator$$anonfun$1$$anonfun$applyOrElse$1.apply(AggregationIterator.scala:171)
at
org.apache.spark.sql.execution.aggregate.AggregationIterator$$anonfun$1$$anonfun$applyOrElse$1.apply(AggregationIterator.scala:171)
at
org.apache.spark.sql.execution.aggregate.AggregationIterator$$anonfun$generateProcessRow$1.apply(AggregationIterator.scala:187)
at
org.apache.spark.sql.execution.aggregate.AggregationIterator$$anonfun$generateProcessRow$1.apply(AggregationIterator.scala:181)
at
org.apache.spark.sql.execution.aggregate.ObjectAggregationIterator.processInputs(ObjectAggregationIterator.scala:151)
at
org.apache.spark.sql.execution.aggregate.ObjectAggregationIterator.<init>(ObjectAggregationIterator.scala:78)
at
org.apache.spark.sql.execution.aggregate.ObjectHashAggregateExec$$anonfun$doExecute$1$$anonfun$2.apply(ObjectHashAggregateExec.scala:109)
at
```
This fix simply converts catalyst values (i.e., `Decimal`) into scala ones
by using `CatalystTypeConverters`.
## How was this patch tested?
Added a test in `DataFrameSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/maropu/spark SPARK-19691
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17028.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #17028
----
commit b216fa104a17b076f246ef236a6deab94ed16246
Author: Takeshi Yamamuro <[email protected]>
Date: 2017-02-22T14:03:20Z
Fix ClassCastException
----
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
