com.hazelcast.jet.sql.impl.opt.physical.LimitPhysicalRel Maven / Gradle / Ivy
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* Copyright 2024 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.sql.impl.opt.OptUtils;
import com.hazelcast.sql.impl.QueryParameterMetadata;
import com.hazelcast.sql.impl.expression.Expression;
import com.hazelcast.sql.impl.plan.node.PlanNodeSchema;
import com.hazelcast.shaded.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.shaded.org.apache.calcite.plan.RelOptCost;
import com.hazelcast.shaded.org.apache.calcite.plan.RelOptPlanner;
import com.hazelcast.shaded.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.shaded.org.apache.calcite.rel.RelNode;
import com.hazelcast.shaded.org.apache.calcite.rel.RelWriter;
import com.hazelcast.shaded.org.apache.calcite.rel.SingleRel;
import com.hazelcast.shaded.org.apache.calcite.rel.metadata.RelMetadataQuery;
import com.hazelcast.shaded.org.apache.calcite.rex.RexNode;
import com.hazelcast.shaded.org.apache.calcite.rex.RexVisitor;
import com.hazelcast.shaded.org.checkerframework.checker.nullness.qual.Nullable;
import java.util.List;
public class LimitPhysicalRel extends SingleRel implements PhysicalRel {
private final RexNode offset;
private final RexNode fetch;
/**
* Creates a {@link LimitPhysicalRel}.
*/
protected LimitPhysicalRel(RexNode offset, RexNode fetch, RelOptCluster cluster, RelTraitSet traits, RelNode input) {
super(cluster, traits, input);
this.offset = offset;
this.fetch = fetch;
}
@Override
public PlanNodeSchema schema(QueryParameterMetadata parameterMetadata) {
return ((PhysicalRel) input).schema(parameterMetadata);
}
@Override
public V accept(CreateDagVisitor visitor) {
return visitor.onLimit(this);
}
@Override
public @Nullable RelOptCost computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq) {
return planner.getCostFactory().makeZeroCost();
}
@Override
public RelNode copy(RelTraitSet traitSet, List inputs) {
return new LimitPhysicalRel(offset, fetch, getCluster(), traitSet, sole(inputs));
}
@Override
public RelWriter explainTerms(RelWriter pw) {
return super.explainTerms(pw)
.itemIf("offset", offset, offset != null)
.itemIf("fetch", fetch, fetch != null);
}
public Expression> offset(QueryParameterMetadata parameterMetadata) {
PlanNodeSchema schema = schema(parameterMetadata);
RexVisitor> visitor = OptUtils.createRexToExpressionVisitor(schema, parameterMetadata);
return offset.accept(visitor);
}
public Expression> fetch(QueryParameterMetadata parameterMetadata) {
PlanNodeSchema schema = schema(parameterMetadata);
RexVisitor> visitor = OptUtils.createRexToExpressionVisitor(schema, parameterMetadata);
return fetch.accept(visitor);
}
public RexNode offset() {
return offset;
}
public RexNode fetch() {
return fetch;
}
}
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