Github user chenghao-intel commented on the pull request:
https://github.com/apache/spark/pull/6828#issuecomment-112662507
There are 2 Struct UDFs in Hive:
https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFStruct.java
(struct)
https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFNamedStruct.java
(named_struct)
For the previous one, we will give the default names for its fields, but
for the later, we will create the struct type by given names. We need to
implement both of them, but this PR seems only for solve the bug of the former
one.
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