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https://issues.apache.org/jira/browse/SPARK-14580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dongjoon Hyun updated SPARK-14580:
----------------------------------
Description:
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}
*Spark*
{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}
was:
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}
> 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}
>
> *Spark*
> {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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