/*
* 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.drill.exec.physical.impl.filter;
import java.io.IOException;
import java.util.List;
import org.apache.drill.common.expression.ErrorCollector;
import org.apache.drill.common.expression.ErrorCollectorImpl;
import org.apache.drill.common.expression.LogicalExpression;
import org.apache.drill.exec.exception.ClassTransformationException;
import org.apache.drill.exec.exception.OutOfMemoryException;
import org.apache.drill.exec.exception.SchemaChangeException;
import org.apache.drill.exec.expr.ClassGenerator;
import org.apache.drill.exec.expr.CodeGenerator;
import org.apache.drill.exec.expr.ExpressionTreeMaterializer;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.physical.config.Filter;
import org.apache.drill.exec.record.AbstractSingleRecordBatch;
import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode;
import org.apache.drill.exec.record.RecordBatch;
import org.apache.drill.exec.record.TransferPair;
import org.apache.drill.exec.record.VectorWrapper;
import org.apache.drill.exec.record.selection.SelectionVector2;
import org.apache.drill.exec.record.selection.SelectionVector4;
import org.apache.drill.exec.vector.ValueVector;
import com.google.common.collect.Lists;
public class FilterRecordBatch extends AbstractSingleRecordBatch<Filter>{
//private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(FilterRecordBatch.class);
private SelectionVector2 sv2;
private SelectionVector4 sv4;
private Filterer filter;
public FilterRecordBatch(Filter pop, RecordBatch incoming, FragmentContext context) throws OutOfMemoryException {
super(pop, context, incoming);
}
@Override
public FragmentContext getContext() {
return context;
}
@Override
public int getRecordCount() {
return sv2 != null ? sv2.getCount() : sv4.getCount();
}
@Override
public SelectionVector2 getSelectionVector2() {
return sv2;
}
@Override
public SelectionVector4 getSelectionVector4() {
return sv4;
}
@Override
protected IterOutcome doWork() {
container.zeroVectors();
int recordCount = incoming.getRecordCount();
try {
filter.filterBatch(recordCount);
} catch (SchemaChangeException e) {
throw new UnsupportedOperationException(e);
}
return IterOutcome.OK;
}
@Override
public void close() {
if (sv2 != null) {
sv2.clear();
}
if (sv4 != null) {
sv4.clear();
}
super.close();
}
@Override
protected boolean setupNewSchema() throws SchemaChangeException {
if (sv2 != null) {
sv2.clear();
}
switch (incoming.getSchema().getSelectionVectorMode()) {
case NONE:
if (sv2 == null) {
sv2 = new SelectionVector2(oContext.getAllocator());
}
this.filter = generateSV2Filterer();
break;
case TWO_BYTE:
sv2 = new SelectionVector2(oContext.getAllocator());
this.filter = generateSV2Filterer();
break;
case FOUR_BYTE:
/*
* Filter does not support SV4 handling. There are couple of minor issues in the
* logic that handles SV4 + filter should always be pushed beyond sort so disabling
* it in FilterPrel.
*
// set up the multi-batch selection vector
this.svAllocator = oContext.getAllocator().getNewPreAllocator();
if (!svAllocator.preAllocate(incoming.getRecordCount()*4))
throw new SchemaChangeException("Attempted to filter an SV4 which exceeds allowed memory (" +
incoming.getRecordCount() * 4 + " bytes)");
sv4 = new SelectionVector4(svAllocator.getAllocation(), incoming.getRecordCount(), Character.MAX_VALUE);
this.filter = generateSV4Filterer();
break;
*/
default:
throw new UnsupportedOperationException();
}
if (container.isSchemaChanged()) {
container.buildSchema(SelectionVectorMode.TWO_BYTE);
return true;
}
return false;
}
protected Filterer generateSV4Filterer() throws SchemaChangeException {
final ErrorCollector collector = new ErrorCollectorImpl();
final List<TransferPair> transfers = Lists.newArrayList();
final ClassGenerator<Filterer> cg = CodeGenerator.getRoot(Filterer.TEMPLATE_DEFINITION4, context.getFunctionRegistry(), context.getOptions());
final LogicalExpression expr = ExpressionTreeMaterializer.materialize(popConfig.getExpr(), incoming, collector, context.getFunctionRegistry());
if (collector.hasErrors()) {
throw new SchemaChangeException(String.format("Failure while trying to materialize incoming schema. Errors:\n %s.", collector.toErrorString()));
}
cg.addExpr(new ReturnValueExpression(expr), ClassGenerator.BlkCreateMode.FALSE);
for (final VectorWrapper<?> vw : incoming) {
for (final ValueVector vv : vw.getValueVectors()) {
final TransferPair pair = vv.getTransferPair(oContext.getAllocator());
container.add(pair.getTo());
transfers.add(pair);
}
}
// allocate outgoing sv4
container.buildSchema(SelectionVectorMode.FOUR_BYTE);
try {
final TransferPair[] tx = transfers.toArray(new TransferPair[transfers.size()]);
final Filterer filter = context.getImplementationClass(cg);
filter.setup(context, incoming, this, tx);
return filter;
} catch (ClassTransformationException | IOException e) {
throw new SchemaChangeException("Failure while attempting to load generated class", e);
}
}
protected Filterer generateSV2Filterer() throws SchemaChangeException {
final ErrorCollector collector = new ErrorCollectorImpl();
final List<TransferPair> transfers = Lists.newArrayList();
final ClassGenerator<Filterer> cg = CodeGenerator.getRoot(Filterer.TEMPLATE_DEFINITION2, context.getFunctionRegistry(), context.getOptions());
final LogicalExpression expr = ExpressionTreeMaterializer.materialize(popConfig.getExpr(), incoming, collector,
context.getFunctionRegistry(), false, unionTypeEnabled);
if (collector.hasErrors()) {
throw new SchemaChangeException(String.format("Failure while trying to materialize incoming schema. Errors:\n %s.", collector.toErrorString()));
}
cg.addExpr(new ReturnValueExpression(expr), ClassGenerator.BlkCreateMode.FALSE);
for (final VectorWrapper<?> v : incoming) {
final TransferPair pair = v.getValueVector().makeTransferPair(container.addOrGet(v.getField(), callBack));
transfers.add(pair);
}
try {
final TransferPair[] tx = transfers.toArray(new TransferPair[transfers.size()]);
CodeGenerator<Filterer> codeGen = cg.getCodeGenerator();
codeGen.plainJavaCapable(true);
// Uncomment out this line to debug the generated code.
// cg.saveCodeForDebugging(true);
final Filterer filter = context.getImplementationClass(codeGen);
filter.setup(context, incoming, this, tx);
return filter;
} catch (ClassTransformationException | IOException e) {
throw new SchemaChangeException("Failure while attempting to load generated class", e);
}
}
}