org.apache.hadoop.hive.ql.exec.vector.expressions.RoundWithNumDigitsDoubleToDouble Maven / Gradle / Ivy
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* 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.VectorExpressionDescriptor;
import org.apache.hadoop.hive.ql.udf.generic.RoundUtils;
import org.apache.hadoop.io.IntWritable;
// Vectorized implementation of ROUND(Col, N) function
public class RoundWithNumDigitsDoubleToDouble extends MathFuncDoubleToDouble
implements ISetLongArg {
private static final long serialVersionUID = 1L;
private IntWritable decimalPlaces;
public RoundWithNumDigitsDoubleToDouble(int colNum, long scalarVal, int outputColumn) {
super(colNum, outputColumn);
this.decimalPlaces = new IntWritable();
decimalPlaces.set((int) scalarVal);
}
public RoundWithNumDigitsDoubleToDouble() {
super();
}
// Round to the specified number of decimal places using the standard Hive round function.
@Override
public double func(double d) {
return RoundUtils.round(d, decimalPlaces.get());
}
void setDecimalPlaces(IntWritable decimalPlaces) {
this.decimalPlaces = decimalPlaces;
}
public IntWritable getDecimalPlaces() {
return this.decimalPlaces;
}
@Override
public void setArg(long l) {
this.decimalPlaces.set((int) l);
}
@Override
public VectorExpressionDescriptor.Descriptor getDescriptor() {
VectorExpressionDescriptor.Builder b = new VectorExpressionDescriptor.Builder();
b.setMode(VectorExpressionDescriptor.Mode.PROJECTION)
.setNumArguments(2)
.setArgumentTypes(
VectorExpressionDescriptor.ArgumentType.FLOAT_FAMILY,
VectorExpressionDescriptor.ArgumentType.INT_FAMILY)
.setInputExpressionTypes(
VectorExpressionDescriptor.InputExpressionType.COLUMN,
VectorExpressionDescriptor.InputExpressionType.SCALAR);
return b.build();
}
}