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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.drill.exec.planner.physical;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.calcite.rex.RexBuilder;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.config.Filter;
import org.apache.drill.exec.planner.common.DrillFilterRelBase;
import org.apache.drill.exec.planner.common.DrillRelOptUtil;
import org.apache.drill.exec.planner.logical.DrillParseContext;
import org.apache.drill.exec.planner.physical.visitor.PrelVisitor;
import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.plan.RelOptCluster;
import org.apache.calcite.plan.RelTraitSet;
import org.apache.calcite.rex.RexNode;
public class FilterPrel extends DrillFilterRelBase implements Prel {
protected FilterPrel(RelOptCluster cluster, RelTraitSet traits, RelNode child, RexNode condition) {
super(Prel.DRILL_PHYSICAL, cluster, traits, child, condition);
}
@Override
public org.apache.calcite.rel.core.Filter copy(RelTraitSet traitSet, RelNode input, RexNode condition) {
return new FilterPrel(getCluster(), traitSet, input, condition);
}
@Override
public PhysicalOperator getPhysicalOperator(PhysicalPlanCreator creator) throws IOException {
Prel child = (Prel) this.getInput();
PhysicalOperator childPOP = child.getPhysicalOperator(creator);
Filter p = new Filter(childPOP, getFilterExpression(new DrillParseContext(PrelUtil.getSettings(getCluster()))), 1.0f);
return creator.addMetadata(this, p);
}
@Override
public Iterator<Prel> iterator() {
return PrelUtil.iter(getInput());
}
@Override
public <T, X, E extends Throwable> T accept(PrelVisitor<T, X, E> logicalVisitor, X value) throws E {
return logicalVisitor.visitPrel(this, value);
}
@Override
public SelectionVectorMode[] getSupportedEncodings() {
return SelectionVectorMode.NONE_AND_TWO;
}
/**
* FilterPrel adds an SV2 (TWO_BYTE mode SelectionVector).
*/
@Override
public SelectionVectorMode getEncoding() {
return SelectionVectorMode.TWO_BYTE;
}
@Override
public boolean needsFinalColumnReordering() {
return true;
}
@Override
public Prel addImplicitRowIDCol(List<RelNode> children) {
RexBuilder builder = this.getCluster().getRexBuilder();
return (Prel) this.copy(this.traitSet, children.get(0), DrillRelOptUtil.transformExpr(builder, condition, buildMap()));
}
private Map<Integer, Integer> buildMap() {
Map<Integer, Integer> map = new HashMap<>();
for (int i=0;i<this.getInput().getRowType().getFieldCount();i++) {
map.put(i, i+1);
}
return map;
}
}
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