| /* |
| * 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.drill.exec.expr.fn; |
| |
| import org.apache.drill.common.expression.FunctionCall; |
| import org.apache.drill.exec.planner.sql.DrillOperatorTable; |
| |
| public interface PluggableFunctionRegistry { |
| |
| /** |
| * Register functions in given operator table. There are two methods to add operators. |
| * One is addOperatorWithInference whose added operators will be used |
| * when planner.type_inference.enable is set to true; |
| * The other is addOperatorWithoutInference whose added operators will be used |
| * when planner.type_inference.enable is set to false; |
| * @param operatorTable |
| */ |
| public void register(DrillOperatorTable operatorTable); |
| |
| /** |
| * If exists return the function implementation holder matching the given <code>functionCall</code> expression, |
| * otherwise null. |
| * |
| * @param functionCall |
| * @return |
| */ |
| public AbstractFuncHolder getFunction(FunctionCall functionCall); |
| } |