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Can I Do Transforms Or Add New Functionality? |
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Answer» Impala adds support for UDFs in Impala 1.2. You can write your own functions in C++, or REUSE existing Java-based Hive UDFs. The UDF support INCLUDES scalar functions and user-defined aggregate functions (UDAS). User-defined table functions (UDTFs) are not currently supported. Impala does not currently support an extensible serialization-deserialization framework (SerDes), and so adding EXTRA functionality to Impala is not as straightforward as for Hive or Pig. Impala adds support for UDFs in Impala 1.2. You can write your own functions in C++, or reuse existing Java-based Hive UDFs. The UDF support includes scalar functions and user-defined aggregate functions (UDAs). User-defined table functions (UDTFs) are not currently supported. Impala does not currently support an extensible serialization-deserialization framework (SerDes), and so adding extra functionality to Impala is not as straightforward as for Hive or Pig. |
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