@Override
  public String vectorExpressionParameters() {
    return getColumnParamString(0, inputColumnNum[0]) + ", " + getColumnParamString(1, inputColumnNum[1]);
  }
Base class for vectorized implementation of GenericUDFMurmurHash. See subclasses for int/string
parameter variations.
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/expressions/MurmurHashExpression.java