com.hazelcast.jet.sql.impl.opt.physical.CalcPhysicalRel Maven / Gradle / Ivy

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/*
 * Copyright 2021 Hazelcast Inc.
 *
 * Licensed under the Hazelcast Community License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://hazelcast.com/hazelcast-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.jet.sql.impl.opt.physical;

import com.hazelcast.jet.core.Vertex;
import com.hazelcast.sql.impl.QueryParameterMetadata;
import com.hazelcast.sql.impl.expression.Expression;
import com.hazelcast.sql.impl.plan.node.PlanNodeSchema;
import com.hazelcast.sql.impl.type.QueryDataType;
import com.hazelcast.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.RelWriter;
import com.hazelcast.org.apache.calcite.rel.core.Calc;
import com.hazelcast.org.apache.calcite.rex.RexNode;
import com.hazelcast.org.apache.calcite.rex.RexProgram;

import java.util.List;

import static com.hazelcast.jet.impl.util.Util.toList;

public class CalcPhysicalRel extends Calc implements PhysicalRel {

    CalcPhysicalRel(
            RelOptCluster cluster,
            RelTraitSet traits,
            RelNode input,
            RexProgram program
    ) {
        super(cluster, traits, input, program);
    }

    public Expression filter(QueryParameterMetadata parameterMetadata) {
        PlanNodeSchema schema = ((PhysicalRel) getInput()).schema(parameterMetadata);
        return filter(schema, program.expandLocalRef(program.getCondition()), parameterMetadata);
    }

    public List> projection(QueryParameterMetadata parameterMetadata) {
        PlanNodeSchema inputSchema = ((PhysicalRel) getInput()).schema(parameterMetadata);
        List projectList = program.expandList(program.getProjectList());
        return project(inputSchema, projectList, parameterMetadata);
    }

    @Override
    public PlanNodeSchema schema(QueryParameterMetadata parameterMetadata) {
        List fieldTypes = toList(projection(parameterMetadata), Expression::getType);
        return new PlanNodeSchema(fieldTypes);
    }

    @Override
    public Vertex accept(CreateDagVisitor visitor) {
        return visitor.onCalc(this);
    }

    @Override
    public final RelWriter explainTerms(RelWriter pw) {
        return super.explainTerms(pw);
    }

    @Override
    public final Calc copy(RelTraitSet traitSet, RelNode input, RexProgram program) {
        return new CalcPhysicalRel(getCluster(), traitSet, input, program);
    }
}