| /* |
| * 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.flink.table.planner.expressions.converter.converters; |
| |
| import org.apache.flink.annotation.Internal; |
| import org.apache.flink.table.expressions.CallExpression; |
| import org.apache.flink.table.expressions.Expression; |
| import org.apache.flink.table.expressions.TableReferenceExpression; |
| import org.apache.flink.table.functions.BuiltInFunctionDefinitions; |
| import org.apache.flink.table.operations.QueryOperation; |
| import org.apache.flink.table.planner.calcite.FlinkRelBuilder; |
| import org.apache.flink.table.planner.expressions.converter.CallExpressionConvertRule; |
| |
| import com.google.common.collect.ImmutableList; |
| import org.apache.calcite.rex.RexNode; |
| import org.apache.calcite.rex.RexSubQuery; |
| |
| import java.util.List; |
| |
| import static org.apache.flink.table.planner.expressions.converter.ExpressionConverter.toRexNodes; |
| |
| /** Conversion for {@link BuiltInFunctionDefinitions#IN}. */ |
| @Internal |
| class InConverter extends CustomizedConverter { |
| @Override |
| public RexNode convert(CallExpression call, CallExpressionConvertRule.ConvertContext context) { |
| checkArgument(call, call.getChildren().size() > 1); |
| Expression headExpr = call.getChildren().get(1); |
| if (headExpr instanceof TableReferenceExpression) { |
| QueryOperation tableOperation = |
| ((TableReferenceExpression) headExpr).getQueryOperation(); |
| RexNode child = context.toRexNode(call.getChildren().get(0)); |
| return RexSubQuery.in( |
| ((FlinkRelBuilder) context.getRelBuilder()) |
| .queryOperation(tableOperation) |
| .build(), |
| ImmutableList.of(child)); |
| } else { |
| List<RexNode> child = toRexNodes(context, call.getChildren()); |
| return context.getRelBuilder() |
| .getRexBuilder() |
| .makeIn(child.get(0), child.subList(1, child.size())); |
| } |
| } |
| } |