/**
* 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.util.Calendar;
import org.apache.hadoop.hive.ql.exec.vector.ColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.LongColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.VectorExpressionDescriptor;
import org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch;
import org.apache.hadoop.hive.serde2.io.DateWritable;
import org.apache.hive.common.util.DateUtils;
import com.google.common.base.Preconditions;
/**
* Abstract class to return various fields from a Timestamp or Date.
*/
public abstract class VectorUDFTimestampFieldDate extends VectorExpression {
private static final long serialVersionUID = 1L;
protected int colNum;
protected int outputColumn;
protected int field;
protected transient final Calendar calendar = Calendar.getInstance();
public VectorUDFTimestampFieldDate(int field, int colNum, int outputColumn) {
this();
this.colNum = colNum;
this.outputColumn = outputColumn;
this.field = field;
}
public VectorUDFTimestampFieldDate() {
super();
}
protected long getDateField(long days) {
calendar.setTimeInMillis(DateWritable.daysToMillis((int) days));
return calendar.get(field);
}
@Override
public void evaluate(VectorizedRowBatch batch) {
Preconditions.checkState(inputTypes[0] == VectorExpression.Type.DATE);
if (childExpressions != null) {
super.evaluateChildren(batch);
}
LongColumnVector outV = (LongColumnVector) batch.cols[outputColumn];
ColumnVector inputColVec = batch.cols[this.colNum];
/* every line below this is identical for evaluateLong & evaluateString */
final int n = inputColVec.isRepeating ? 1 : batch.size;
int[] sel = batch.selected;
final boolean selectedInUse = (inputColVec.isRepeating == false) && batch.selectedInUse;
if(batch.size == 0) {
/* n != batch.size when isRepeating */
return;
}
/* true for all algebraic UDFs with no state */
outV.isRepeating = inputColVec.isRepeating;
LongColumnVector longColVector = (LongColumnVector) inputColVec;
if (inputColVec.noNulls) {
outV.noNulls = true;
if (selectedInUse) {
for(int j=0; j < n; j++) {
int i = sel[j];
outV.vector[i] = getDateField(longColVector.vector[i]);
}
} else {
for(int i = 0; i < n; i++) {
outV.vector[i] = getDateField(longColVector.vector[i]);
}
}
} else {
// Handle case with nulls. Don't do function if the value is null, to save time,
// because calling the function can be expensive.
outV.noNulls = false;
if (selectedInUse) {
for(int j=0; j < n; j++) {
int i = sel[j];
outV.isNull[i] = inputColVec.isNull[i];
if (!inputColVec.isNull[i]) {
outV.vector[i] = getDateField(longColVector.vector[i]);
}
}
} else {
for(int i = 0; i < n; i++) {
outV.isNull[i] = inputColVec.isNull[i];
if (!inputColVec.isNull[i]) {
outV.vector[i] = getDateField(longColVector.vector[i]);
}
}
}
}
}
@Override
public int getOutputColumn() {
return this.outputColumn;
}
@Override
public String getOutputType() {
return "long";
}
public int getColNum() {
return colNum;
}
public void setColNum(int colNum) {
this.colNum = colNum;
}
public int getField() {
return field;
}
public void setField(int field) {
this.field = field;
}
public void setOutputColumn(int outputColumn) {
this.outputColumn = outputColumn;
}
@Override
public String vectorExpressionParameters() {
if (field == -1) {
return "col " + colNum;
} else {
return "col " + colNum + ", field " + DateUtils.getFieldName(field);
}
}
@Override
public VectorExpressionDescriptor.Descriptor getDescriptor() {
VectorExpressionDescriptor.Builder b = new VectorExpressionDescriptor.Builder();
b.setMode(VectorExpressionDescriptor.Mode.PROJECTION)
.setNumArguments(1)
.setArgumentTypes(
VectorExpressionDescriptor.ArgumentType.DATE)
.setInputExpressionTypes(
VectorExpressionDescriptor.InputExpressionType.COLUMN);
return b.build();
}
}