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package org.apache.hadoop.hive.ql.udf;
@Description(name = "power,pow",
    value = "_FUNC_(x1, x2) - raise x1 to the power of x2",
    extended = "Example:\n"
    + "  > SELECT _FUNC_(2, 3) FROM src LIMIT 1;\n" + "  8")
public class UDFPower extends UDF {
  private DoubleWritable result = new DoubleWritable();
  public UDFPower() {

Raise a to the power of b.
    if (a == null || b == null) {
      return null;
    } else {
      .set(Math.pow(a.get(), b.get()));
      return ;
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