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Priyanka Garg commented on SPARK-18048:
---------------------------------------
I am working on it.
> If expression behaves differently if true and false expression are interchanged in case
of different data types.
> ----------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-18048
> URL: https://issues.apache.org/jira/browse/SPARK-18048
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Priyanka Garg
>
> If expression behaves differently if true and false expression are interchanged in case
of different data types.
> For eg.
> If(Literal.create(geo != null, BooleanType),
> Literal.create(null, DateType),
> Literal.create(null, TimestampType)) is throwing error while
> If(Literal.create(geo != null, BooleanType),
> Literal.create(null, TimestampType),
> Literal.create(null, DateType )) works fine.
> The reason for the same is that the If expression 's datatype only considers trueValue.dataType.
> Also,
> If(Literal.create(geo != null, BooleanType),
> Literal.create(null, DateType),
> Literal.create(null, TimestampType))
> is breaking only in case of Generated mutable Projection and Unsafe projection. For
all other types its working fine.
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