/**
* 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 java.sql.Timestamp;
import org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression;
import org.apache.hadoop.hive.ql.exec.vector.*;
import org.apache.hadoop.hive.ql.exec.vector.expressions.NullUtil;
import org.apache.hadoop.hive.ql.util.DateTimeMath;
import org.apache.hadoop.hive.serde2.io.DateWritable;
// A type date (LongColumnVector storing epoch days) minus a type date produces a
// type interval_day_time (TimestampColumnVector storing nanosecond interval in 2 longs).
public class DateScalarSubtractDateColumn extends VectorExpression {
private static final long serialVersionUID = 1L;
private int colNum;
private Timestamp value;
private int outputColumn;
private Timestamp scratchTimestamp2;
private DateTimeMath dtm = new DateTimeMath();
public DateScalarSubtractDateColumn(long value, int colNum, int outputColumn) {
this.colNum = colNum;
this.value = new Timestamp(0);
this.value.setTime(DateWritable.daysToMillis((int) value));
this.outputColumn = outputColumn;
scratchTimestamp2 = new Timestamp(0);
}
public DateScalarSubtractDateColumn() {
}
@Override
/**
* Method to evaluate scalar-column operation in vectorized fashion.
*
* @batch a package of rows with each column stored in a vector
*/
public void evaluate(VectorizedRowBatch batch) {
if (childExpressions != null) {
super.evaluateChildren(batch);
}
// Input #2 is type date (epochDays).
LongColumnVector inputColVector2 = (LongColumnVector) batch.cols[colNum];
// Output is type HiveIntervalDayTime.
IntervalDayTimeColumnVector outputColVector = (IntervalDayTimeColumnVector) batch.cols[outputColumn];
int[] sel = batch.selected;
boolean[] inputIsNull = inputColVector2.isNull;
boolean[] outputIsNull = outputColVector.isNull;
outputColVector.noNulls = inputColVector2.noNulls;
outputColVector.isRepeating = inputColVector2.isRepeating;
int n = batch.size;
long[] vector2 = inputColVector2.vector;
// return immediately if batch is empty
if (n == 0) {
return;
}
if (inputColVector2.isRepeating) {
scratchTimestamp2.setTime(DateWritable.daysToMillis((int) vector2[0]));
dtm.subtract(value, scratchTimestamp2, outputColVector.getScratchIntervalDayTime());
outputColVector.setFromScratchIntervalDayTime(0);
// Even if there are no nulls, we always copy over entry 0. Simplifies code.
outputIsNull[0] = inputIsNull[0];
} else if (inputColVector2.noNulls) {
if (batch.selectedInUse) {
for(int j = 0; j != n; j++) {
int i = sel[j];
scratchTimestamp2.setTime(DateWritable.daysToMillis((int) vector2[i]));
dtm.subtract(value, scratchTimestamp2, outputColVector.getScratchIntervalDayTime());
outputColVector.setFromScratchIntervalDayTime(i);
}
} else {
for(int i = 0; i != n; i++) {
scratchTimestamp2.setTime(DateWritable.daysToMillis((int) vector2[i]));
dtm.subtract(value, scratchTimestamp2, outputColVector.getScratchIntervalDayTime());
outputColVector.setFromScratchIntervalDayTime(i);
}
}
} else { /* there are nulls */
if (batch.selectedInUse) {
for(int j = 0; j != n; j++) {
int i = sel[j];
scratchTimestamp2.setTime(DateWritable.daysToMillis((int) vector2[i]));
dtm.subtract(value, scratchTimestamp2, outputColVector.getScratchIntervalDayTime());
outputColVector.setFromScratchIntervalDayTime(i);
outputIsNull[i] = inputIsNull[i];
}
} else {
for(int i = 0; i != n; i++) {
scratchTimestamp2.setTime(DateWritable.daysToMillis((int) vector2[i]));
dtm.subtract(value, scratchTimestamp2, outputColVector.getScratchIntervalDayTime());
outputColVector.setFromScratchIntervalDayTime(i);
}
System.arraycopy(inputIsNull, 0, outputIsNull, 0, n);
}
}
NullUtil.setNullOutputEntriesColScalar(outputColVector, batch.selectedInUse, sel, n);
}
@Override
public int getOutputColumn() {
return outputColumn;
}
@Override
public String getOutputType() {
return "timestamp";
}
@Override
public String vectorExpressionParameters() {
return "val " + value + ", col " + colNum;
}
@Override
public VectorExpressionDescriptor.Descriptor getDescriptor() {
return (new VectorExpressionDescriptor.Builder())
.setMode(
VectorExpressionDescriptor.Mode.PROJECTION)
.setNumArguments(2)
.setArgumentTypes(
VectorExpressionDescriptor.ArgumentType.getType("date"),
VectorExpressionDescriptor.ArgumentType.getType("date"))
.setInputExpressionTypes(
VectorExpressionDescriptor.InputExpressionType.SCALAR,
VectorExpressionDescriptor.InputExpressionType.COLUMN).build();
}
}