com.hazelcast.org.apache.calcite.rel.rules.TableScanRule Maven / Gradle / Ivy
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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.
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package com.hazelcast.org.apache.calcite.rel.rules;
import com.hazelcast.org.apache.calcite.plan.RelOptRule;
import com.hazelcast.org.apache.calcite.plan.RelOptRuleCall;
import com.hazelcast.org.apache.calcite.plan.RelOptTable;
import com.hazelcast.org.apache.calcite.plan.ViewExpanders;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.core.RelFactories;
import com.hazelcast.org.apache.calcite.rel.logical.LogicalTableScan;
import com.hazelcast.org.apache.calcite.tools.RelBuilderFactory;
/**
* Planner rule that converts a
* {@link com.hazelcast.org.apache.calcite.rel.logical.LogicalTableScan} to the result
* of calling {@link RelOptTable#toRel}.
*
* @deprecated {@code com.hazelcast.org.apache.calcite.rel.core.RelFactories.TableScanFactoryImpl}
* has called {@link RelOptTable#toRel(RelOptTable.ToRelContext)}.
*/
@Deprecated // to be removed before 2.0
public class TableScanRule extends RelOptRule implements TransformationRule {
//~ Static fields/initializers ---------------------------------------------
public static final TableScanRule INSTANCE =
new TableScanRule(RelFactories.LOGICAL_BUILDER);
//~ Constructors -----------------------------------------------------------
/**
* Creates a TableScanRule.
*
* @param relBuilderFactory Builder for relational expressions
*/
public TableScanRule(RelBuilderFactory relBuilderFactory) {
super(operand(LogicalTableScan.class, any()), relBuilderFactory, null);
}
//~ Methods ----------------------------------------------------------------
public void onMatch(RelOptRuleCall call) {
final LogicalTableScan oldRel = call.rel(0);
RelNode newRel =
oldRel.getTable().toRel(
ViewExpanders.simpleContext(oldRel.getCluster()));
call.transformTo(newRel);
}
}