/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.drill.common.util;
public class DecimalScalePrecisionAddFunction extends DrillBaseComputeScalePrecision {
public DecimalScalePrecisionAddFunction(int leftPrecision, int leftScale, int rightPrecision, int rightScale) {
super(leftPrecision, leftScale, rightPrecision, rightScale);
}
@Override
public void computeScalePrecision(int leftPrecision, int leftScale, int rightPrecision, int rightScale) {
// compute the output scale and precision here
outputScale = Math.max(leftScale, rightScale);
int maxResultIntegerDigits = Math.max((leftPrecision - leftScale), (rightPrecision - rightScale)) + 1;
outputPrecision = (outputScale + maxResultIntegerDigits);
// If we are beyond the maximum precision range, cut down the fractional part
if (outputPrecision > 38) {
outputPrecision = 38;
outputScale = (outputPrecision - maxResultIntegerDigits >= 0) ? (outputPrecision - maxResultIntegerDigits) : 0;
}
}
}