org.apache.calcite.adapter.geode.rel.GeodeProject Maven / Gradle / Ivy
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* 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
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.calcite.adapter.geode.rel;
import org.apache.calcite.adapter.geode.rel.GeodeRules.RexToGeodeTranslator;
import org.apache.calcite.plan.RelOptCluster;
import org.apache.calcite.plan.RelOptCost;
import org.apache.calcite.plan.RelOptPlanner;
import org.apache.calcite.plan.RelTraitSet;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.core.Project;
import org.apache.calcite.rel.metadata.RelMetadataQuery;
import org.apache.calcite.rel.type.RelDataType;
import org.apache.calcite.rex.RexNode;
import org.apache.calcite.util.Pair;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* Implementation of
* {@link Project}
* relational expression in Geode.
*/
public class GeodeProject extends Project implements GeodeRel {
GeodeProject(RelOptCluster cluster, RelTraitSet traitSet,
RelNode input, List projects, RelDataType rowType) {
super(cluster, traitSet, input, projects, rowType);
assert getConvention() == GeodeRel.CONVENTION;
assert getConvention() == input.getConvention();
}
@Override public Project copy(RelTraitSet traitSet, RelNode input,
List projects, RelDataType rowType) {
return new GeodeProject(getCluster(), traitSet, input, projects, rowType);
}
@Override public RelOptCost computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq) {
return super.computeSelfCost(planner, mq).multiplyBy(0.1);
}
@Override public void implement(GeodeImplementContext geodeImplementContext) {
geodeImplementContext.visitChild(getInput());
final RexToGeodeTranslator translator =
new RexToGeodeTranslator(
GeodeRules.geodeFieldNames(getInput().getRowType()));
final Map fields = new LinkedHashMap<>();
for (Pair pair : getNamedProjects()) {
final String name = pair.right;
final String originalName = pair.left.accept(translator);
fields.put(originalName, name);
}
geodeImplementContext.addSelectFields(fields);
}
}
// End GeodeProject.java