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https://issues.apache.org/jira/browse/SPARK-19311?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Gregor Moehler updated SPARK-19311:
-----------------------------------
Description:
When you define UDTs based on hierarchical traits UDFs disregard the type
hierarchy:
E.g. I have 2 UDTs based on 2 hierarchical traits. I then define 2 UDFs: The
first one returns the derived type, the second takes the base type. This
results in an error, although i believe it should be feasible:
(...)cannot resolve 'UDF(UDF(22))' due to data type mismatch: argument 1
requires exampleBaseType type, however, 'UDF(22)' is of exampleFirstSubType
type.
The reason is that DataType defines
override private[sql] def acceptsType(dataType: DataType) =
this.getClass == dataType.getClass
However I believe it should be:
override private[sql] def acceptsType(dataType: DataType) = dataType match {
case other: UserDefinedType[_] =>
this.getClass == other.getClass ||
this.userClass.isAssignableFrom(other.userClass)
case _ => false
}
was:
When you define UDTs based on hierarchical traits UDFs disregard the type
hierarchy:
E.g. I have 2 UDTs based on 2 hierarchical traits. I then define 2 UDFs: The
first one returns the derived type, the second takes the base type. This
results in an error, although i believe it should be feasible:
(...)cannot resolve 'UDF(UDF(22))' due to data type mismatch: argument 1
requires exampleBaseType type, however, 'UDF(22)' is of exampleFirstSubType
type.
The reason is that DataType defines
override private[sql] def acceptsType(dataType: DataType) =
this.getClass == dataType.getClass
However I believe it should be:
```override private[sql] def acceptsType(dataType: DataType) = dataType match {
case other: UserDefinedType[_] =>
this.getClass == other.getClass ||
this.userClass.isAssignableFrom(other.userClass)
case _ => false
}```
> UDFs disregard UDT type hierarchy
> ---------------------------------
>
> Key: SPARK-19311
> URL: https://issues.apache.org/jira/browse/SPARK-19311
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: Gregor Moehler
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> When you define UDTs based on hierarchical traits UDFs disregard the type
> hierarchy:
> E.g. I have 2 UDTs based on 2 hierarchical traits. I then define 2 UDFs: The
> first one returns the derived type, the second takes the base type. This
> results in an error, although i believe it should be feasible:
> (...)cannot resolve 'UDF(UDF(22))' due to data type mismatch: argument 1
> requires exampleBaseType type, however, 'UDF(22)' is of exampleFirstSubType
> type.
> The reason is that DataType defines
> override private[sql] def acceptsType(dataType: DataType) =
> this.getClass == dataType.getClass
> However I believe it should be:
> override private[sql] def acceptsType(dataType: DataType) = dataType match {
> case other: UserDefinedType[_] =>
> this.getClass == other.getClass ||
> this.userClass.isAssignableFrom(other.userClass)
> case _ => false
> }
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