Tag: 配置单元

如何编译Hive UDF

我正在尝试编译这个UDF： package com.dataminelab.hive.udf; import org.apache.hadoop.hive.ql.exec.UDF; import org.apache.hadoop.io.Text; import java.security.*; /** * Calculate md5 of the string */ public final class Md5 extends UDF { public Text evaluate(final Text s) { if (s == null) { return null; } try { MessageDigest md = MessageDigest.getInstance(“MD5”); md.update(s.toString().getBytes()); byte[] md5hash = md.digest(); StringBuilder builder = new StringBuilder(); for […]