hive - Decimal type columns in Spark -

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i have questions regarding decimal type columns.

  1. i not understand why got decimal type columns, , got double type column.

i did division operation in spark sql, looks like: 

select a/b c table

is because small number generated in data, spark determine column type decimal type?

  1. i got error when trying save table hive, using saveastable method:
java.lang.unsupportedoperationexception: parquet not support decimal.hiveexception: java.lang.unsupportedoperationexception:

parquet not support decimal. see hive-6384

what should do? convert column type double? there automatic way handle this, or tell spark use double type instead of decimal type @ time?


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