Examples of GenericUDF

org.apache.hadoop.hive.ql.udf.generic.GenericUDF
A Generic User-defined function (GenericUDF) for the use with Hive. New GenericUDF classes need to inherit from this GenericUDF class. The GenericUDF are superior to normal UDFs in the following ways: 1. It can accept arguments of complex types, and return complex types. 2. It can accept variable length of arguments. 3. It can accept an infinite number of function signature - for example, it's easy to write a GenericUDF that accepts array, array> and so on (arbitrary levels of nesting). 4. It can do short-circuit evaluations using DeferedObject.

Examples of org.apache.hadoop.hive.ql.udf.generic.GenericUDF

      long numRows = stats.getNumRows();


      if (child instanceof ExprNodeGenericFuncDesc) {


        ExprNodeGenericFuncDesc genFunc = (ExprNodeGenericFuncDesc) child;
        GenericUDF udf = genFunc.getGenericUDF();


        if (udf instanceof GenericUDFOPEqual ||
            udf instanceof GenericUDFOPEqualNS) {
          String colName = null;
          String tabAlias = null;

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