[jira] [Assigned] (SPARK-14580) HiveTypeCoercion.IfCoercion should preserve original predicates.

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-14580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-14580:
------------------------------------

    Assignee:     (was: Apache Spark)

> HiveTypeCoercion.IfCoercion should preserve original predicates.
> ----------------------------------------------------------------
>
>                 Key: SPARK-14580
>                 URL: https://issues.apache.org/jira/browse/SPARK-14580
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.6.1, 2.0.0
>            Reporter: Dongjoon Hyun
>
> Currently, `HiveTypeCoercion.IfCoercion` removes all predicates whose return-type is null. However, some UDFs need evaluations because they are designed to throw exceptions.
> *Hive*
> {code}
> hive> select if(assert_true(false),2,3);
> OK
> Failed with exception java.io.IOException:org.apache.hadoop.hive.ql.metadata.HiveException: ASSERT_TRUE(): assertion failed.
> {code}
>     
> *Before*
> {code}
> scala> sql("select if(assert_true(false),2,3)").head
> res2: org.apache.spark.sql.Row = [3]
> {code}
> `IfCoercion` works like the followings.
> {code}
> === Applying Rule org.apache.spark.sql.catalyst.analysis.HiveTypeCoercion$IfCoercion ===
> !'Project [unresolvedalias(if (HiveGenericUDF#org.apache.hadoop.hive.ql.udf.generic.GenericUDFAssertTrue(false)) 2 else 3)]   'Project [unresolvedalias(if (nu
> ll) 2 else 3)]
>  +- OneRowRelation$                                                                                                           +- OneRowRelation$      
> {code}



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