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https://issues.apache.org/jira/browse/SPARK-17989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15585855#comment-15585855
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Apache Spark commented on SPARK-17989:
--------------------------------------

User 'HyukjinKwon' has created a pull request for this issue:
https://github.com/apache/spark/pull/15532

> Check ascendingOrder type in sort_array function ahead
> ------------------------------------------------------
>
>                 Key: SPARK-17989
>                 URL: https://issues.apache.org/jira/browse/SPARK-17989
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>            Reporter: Hyukjin Kwon
>            Priority: Trivial
>
> {code}
> spark-sql> SELECT sort_array(array('b', 'd', 'c', 'a'), '1');
> 16/10/19 00:28:54 ERROR SparkSQLDriver: Failed in [SELECT 
> sort_array(array('b', 'd', 'c', 'a'), '1')]
> java.lang.ClassCastException: org.apache.spark.unsafe.types.UTF8String cannot 
> be cast to java.lang.Boolean
>       at scala.runtime.BoxesRunTime.unboxToBoolean(BoxesRunTime.java:85)
>       at 
> org.apache.spark.sql.catalyst.expressions.SortArray.nullSafeEval(collectionOperations.scala:185)
>       at 
> org.apache.spark.sql.catalyst.expressions.BinaryExpression.eval(Expression.scala:416)
>       at 
> org.apache.spark.sql.catalyst.optimizer.ConstantFolding$$anonfun$apply$1$$anonfun$applyOrElse$1.applyOrElse(expressions.scala:50)
>       at 
> org.apache.spark.sql.catalyst.optimizer.ConstantFolding$$anonfun$apply$1$$anonfun$applyOrElse$1.applyOrElse(expressions.scala:43)
> {code}
> I guess we should also check this in `checkInputDataTypes`.



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