| /* |
| * 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.table.expressions.ApiExpressionUtils; |
| import org.apache.flink.table.expressions.CallExpression; |
| import org.apache.flink.table.functions.BuiltInFunctionDefinitions; |
| import org.apache.flink.table.planner.expressions.converter.CallExpressionConvertRule; |
| import org.apache.flink.table.planner.functions.sql.FlinkSqlOperatorTable; |
| |
| import org.apache.calcite.rex.RexNode; |
| |
| import java.util.Arrays; |
| |
| import static org.apache.flink.table.planner.expressions.converter.ExpressionConverter.toRexNodes; |
| |
| /** Conversion for {@link BuiltInFunctionDefinitions#SQRT}. */ |
| class SqrtConverter extends CustomizedConverter { |
| @Override |
| public RexNode convert(CallExpression call, CallExpressionConvertRule.ConvertContext context) { |
| checkArgumentNumber(call, 1); |
| return context.getRelBuilder() |
| .call( |
| FlinkSqlOperatorTable.POWER, |
| toRexNodes( |
| context, |
| Arrays.asList( |
| call.getChildren().get(0), |
| ApiExpressionUtils.valueLiteral(0.5)))); |
| } |
| } |
