/**
* 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.common.type.Decimal128;
import org.apache.hadoop.hive.ql.exec.vector.DecimalColumnVector;
import org.apache.hadoop.hive.ql.exec.vector.VectorExpressionDescriptor.Descriptor;
import org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch;
import java.util.HashSet;
/**
* Evaluate IN filter on a batch for a vector of decimals.
*/
public class FilterDecimalColumnInList extends VectorExpression implements IDecimalInExpr {
private static final long serialVersionUID = 1L;
private int inputCol;
private Decimal128[] inListValues;
// The set object containing the IN list.
private transient HashSet<Decimal128> inSet;
public FilterDecimalColumnInList() {
super();
inSet = null;
}
/**
* After construction you must call setInListValues() to add the values to the IN set.
*/
public FilterDecimalColumnInList(int colNum) {
this.inputCol = colNum;
inSet = null;
}
@Override
public void evaluate(VectorizedRowBatch batch) {
if (childExpressions != null) {
super.evaluateChildren(batch);
}
if (inSet == null) {
inSet = new HashSet<Decimal128>(inListValues.length);
for (Decimal128 val : inListValues) {
inSet.add(val);
}
}
DecimalColumnVector inputColVector = (DecimalColumnVector) batch.cols[inputCol];
int[] sel = batch.selected;
boolean[] nullPos = inputColVector.isNull;
int n = batch.size;
Decimal128[] vector = inputColVector.vector;
// return immediately if batch is empty
if (n == 0) {
return;
}
if (inputColVector.noNulls) {
if (inputColVector.isRepeating) {
// All must be selected otherwise size would be zero
// Repeating property will not change.
if (!(inSet.contains(vector[0]))) {
//Entire batch is filtered out.
batch.size = 0;
}
} else if (batch.selectedInUse) {
int newSize = 0;
for(int j = 0; j != n; j++) {
int i = sel[j];
if (inSet.contains(vector[i])) {
sel[newSize++] = i;
}
}
batch.size = newSize;
} else {
int newSize = 0;
for(int i = 0; i != n; i++) {
if (inSet.contains(vector[i])) {
sel[newSize++] = i;
}
}
if (newSize < n) {
batch.size = newSize;
batch.selectedInUse = true;
}
}
} else {
if (inputColVector.isRepeating) {
//All must be selected otherwise size would be zero
//Repeating property will not change.
if (!nullPos[0]) {
if (!inSet.contains(vector[0])) {
//Entire batch is filtered out.
batch.size = 0;
}
} else {
batch.size = 0;
}
} else if (batch.selectedInUse) {
int newSize = 0;
for(int j = 0; j != n; j++) {
int i = sel[j];
if (!nullPos[i]) {
if (inSet.contains(vector[i])) {
sel[newSize++] = i;
}
}
}
// Change the selected vector
batch.size = newSize;
} else {
int newSize = 0;
for(int i = 0; i != n; i++) {
if (!nullPos[i]) {
if (inSet.contains(vector[i])) {
sel[newSize++] = i;
}
}
}
if (newSize < n) {
batch.size = newSize;
batch.selectedInUse = true;
}
}
}
}
@Override
public String getOutputType() {
return "boolean";
}
@Override
public int getOutputColumn() {
return -1;
}
@Override
public Descriptor getDescriptor() {
// This VectorExpression (IN) is a special case, so don't return a descriptor.
return null;
}
public Decimal128[] getInListValues() {
return this.inListValues;
}
public void setInListValues(Decimal128[] a) {
this.inListValues = a;
}
}