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Extensions of Hive for the Data Developer

There is a newer version: 0.6.0

package brickhouse.hbase;
/**
 * Copyright 2012 Klout, Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 **/

import java.text.DecimalFormat;

import org.apache.hadoop.hive.ql.exec.UDF;

/**
 *   Create a salted key from a BigInt, which 
 *    may not be distributed evenly across the 
 *     most significant bits ( ie. some large values, some low values)
 *     but are distributed evenly across the low bits
 *      ( ie. modulo 1000 )
 *
 */
@Deprecated
public class SaltedBigIntUDF extends UDF {
    private DecimalFormat saltFormat = new DecimalFormat("0000");

	public String evaluate( Long id ) {
        StringBuilder sb = new StringBuilder();	
        sb.append( saltFormat.format( id % 10000 ));
        sb.append(":");
        sb.append( id.toString());
		
        return sb.toString();
	}
}