org.apache.hadoop.hive.ql.exec.vector.expressions.Decimal64Util Maven / Gradle / Ivy
/*
* 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.hadoop.hive.ql.exec.vector.expressions;
import org.apache.hadoop.hive.ql.exec.vector.DecimalColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.LongColumnVector;
import org.apache.hadoop.hive.ql.udf.generic.RoundUtils;
import org.apache.hadoop.hive.serde2.io.HiveDecimalWritable;
import org.apache.hadoop.hive.serde2.typeinfo.DecimalTypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils;
/**
* Utility functions for vector operations on decimal64 values.
*/
public class Decimal64Util {
public static long getDecimal64AbsMaxFromDecimalTypeString(String typeString) {
TypeInfo typeInfo = TypeInfoUtils.getTypeInfoFromTypeString(typeString);
if (!(typeInfo instanceof DecimalTypeInfo)) {
throw new RuntimeException(
"Expected decimal type but found " + typeInfo.toString());
}
DecimalTypeInfo decimalTypeInfo = (DecimalTypeInfo) typeInfo;
final int precision = decimalTypeInfo.precision();
if (!HiveDecimalWritable.isPrecisionDecimal64(precision)) {
throw new RuntimeException(
"Expected decimal type " + typeInfo.toString() +
" to have a decimal64 precision (i.e. <= " + HiveDecimalWritable.DECIMAL64_DECIMAL_DIGITS + ")");
}
return HiveDecimalWritable.getDecimal64AbsMax(precision);
}
}