/**
* 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.torel;
import java.util.List;
import java.util.Map;
import net.hydromatic.optiq.prepare.Prepare;
import org.apache.drill.common.expression.LogicalExpression;
import org.apache.drill.common.logical.LogicalPlan;
import org.apache.drill.common.logical.data.Filter;
import org.apache.drill.common.logical.data.GroupingAggregate;
import org.apache.drill.common.logical.data.Join;
import org.apache.drill.common.logical.data.Limit;
import org.apache.drill.common.logical.data.LogicalOperator;
import org.apache.drill.common.logical.data.Order;
import org.apache.drill.common.logical.data.Project;
import org.apache.drill.common.logical.data.Scan;
import org.apache.drill.common.logical.data.Union;
import org.apache.drill.common.logical.data.visitors.AbstractLogicalVisitor;
import org.apache.drill.exec.planner.logical.DrillAggregateRel;
import org.apache.drill.exec.planner.logical.DrillJoinRel;
import org.apache.drill.exec.planner.logical.DrillLimitRel;
import org.apache.drill.exec.planner.logical.DrillRel;
import org.apache.drill.exec.planner.logical.DrillSortRel;
import org.apache.drill.exec.planner.logical.DrillUnionRel;
import org.apache.drill.exec.planner.logical.ScanFieldDeterminer;
import org.apache.drill.exec.planner.logical.ScanFieldDeterminer.FieldList;
import org.eigenbase.rel.InvalidRelException;
import org.eigenbase.rel.RelNode;
import org.eigenbase.relopt.RelOptCluster;
import org.eigenbase.relopt.RelOptTable;
import org.eigenbase.relopt.RelOptTable.ToRelContext;
import org.eigenbase.relopt.RelTraitSet;
import org.eigenbase.reltype.RelDataType;
import org.eigenbase.reltype.RelDataTypeFactory;
import org.eigenbase.rex.RexBuilder;
import org.eigenbase.rex.RexNode;
public class ConversionContext implements ToRelContext {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ConversionContext.class);
private static final ConverterVisitor VISITOR = new ConverterVisitor();
private final Map<Scan, FieldList> scanFieldLists;
private final RelOptCluster cluster;
private final Prepare prepare;
public ConversionContext(RelOptCluster cluster, LogicalPlan plan) {
super();
scanFieldLists = ScanFieldDeterminer.getFieldLists(plan);
this.cluster = cluster;
this.prepare = null;
}
@Override
public RelOptCluster getCluster() {
return cluster;
}
private FieldList getFieldList(Scan scan) {
assert scanFieldLists.containsKey(scan);
return scanFieldLists.get(scan);
}
public RexBuilder getRexBuilder(){
return cluster.getRexBuilder();
}
public RelTraitSet getLogicalTraits(){
RelTraitSet set = RelTraitSet.createEmpty();
set.add(DrillRel.DRILL_LOGICAL);
return set;
}
public RelNode toRel(LogicalOperator operator) throws InvalidRelException{
return operator.accept(VISITOR, this);
}
public RexNode toRex(LogicalExpression e){
return null;
}
public RelDataTypeFactory getTypeFactory(){
return cluster.getTypeFactory();
}
public RelOptTable getTable(Scan scan){
FieldList list = getFieldList(scan);
return null;
}
@Override
public RelNode expandView(RelDataType rowType, String queryString, List<String> schemaPath) {
throw new UnsupportedOperationException();
}
private static class ConverterVisitor extends AbstractLogicalVisitor<RelNode, ConversionContext, InvalidRelException>{
@Override
public RelNode visitScan(Scan scan, ConversionContext context){
//return BaseScanRel.convert(scan, context);
return null;
}
@Override
public RelNode visitFilter(Filter filter, ConversionContext context) throws InvalidRelException{
//return BaseFilterRel.convert(filter, context);
return null;
}
@Override
public RelNode visitProject(Project project, ConversionContext context) throws InvalidRelException{
//return BaseProjectRel.convert(project, context);
return null;
}
@Override
public RelNode visitOrder(Order order, ConversionContext context) throws InvalidRelException{
return DrillSortRel.convert(order, context);
}
@Override
public RelNode visitJoin(Join join, ConversionContext context) throws InvalidRelException{
return DrillJoinRel.convert(join, context);
}
@Override
public RelNode visitLimit(Limit limit, ConversionContext context) throws InvalidRelException{
return DrillLimitRel.convert(limit, context);
}
@Override
public RelNode visitUnion(Union union, ConversionContext context) throws InvalidRelException{
return DrillUnionRel.convert(union, context);
}
@Override
public RelNode visitGroupingAggregate(GroupingAggregate groupBy, ConversionContext context)
throws InvalidRelException {
return DrillAggregateRel.convert(groupBy, context);
}
}
}