| /* |
| * 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.calcite.adapter.enumerable; |
| |
| import org.apache.calcite.plan.Convention; |
| import org.apache.calcite.plan.RelTraitSet; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.convert.ConverterRule; |
| import org.apache.calcite.rel.core.TableFunctionScan; |
| import org.apache.calcite.rel.logical.LogicalTableFunctionScan; |
| |
| /** Rule to convert a {@link LogicalTableFunctionScan} to an {@link EnumerableTableFunctionScan}. |
| * You may provide a custom config to convert other nodes that extend {@link TableFunctionScan}. |
| * |
| * @see EnumerableRules#ENUMERABLE_TABLE_FUNCTION_SCAN_RULE */ |
| public class EnumerableTableFunctionScanRule extends ConverterRule { |
| /** Default configuration. */ |
| public static final Config DEFAULT_CONFIG = Config.INSTANCE |
| .withConversion(LogicalTableFunctionScan.class, Convention.NONE, |
| EnumerableConvention.INSTANCE, "EnumerableTableFunctionScanRule") |
| .withRuleFactory(EnumerableTableFunctionScanRule::new); |
| |
| /** Creates an EnumerableTableFunctionScanRule. */ |
| protected EnumerableTableFunctionScanRule(Config config) { |
| super(config); |
| } |
| |
| @Override public RelNode convert(RelNode rel) { |
| final RelTraitSet traitSet = |
| rel.getTraitSet().replace(EnumerableConvention.INSTANCE); |
| TableFunctionScan scan = (TableFunctionScan) rel; |
| return new EnumerableTableFunctionScan(rel.getCluster(), traitSet, |
| convertList(scan.getInputs(), traitSet.getTrait(0)), |
| scan.getElementType(), scan.getRowType(), |
| scan.getCall(), scan.getColumnMappings()); |
| } |
| } |