| /* |
| * 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.codegen.calls |
| |
| import org.apache.flink.table.api.functions.TableFunction |
| import org.apache.flink.table.api.types.InternalType |
| import org.apache.flink.table.codegen.GeneratedExpression.NEVER_NULL |
| import org.apache.flink.table.codegen.calls.ScalarFunctionCallGen.prepareUDFArgs |
| import org.apache.flink.table.codegen.{CodeGeneratorContext, GeneratedExpression} |
| |
| /** |
| * Generates a call to user-defined [[TableFunction]]. |
| * |
| * @param tableFunction user-defined [[TableFunction]] that might be overloaded |
| */ |
| class TableFunctionCallGen(tableFunction: TableFunction[_]) extends CallGenerator { |
| |
| override def generate( |
| ctx: CodeGeneratorContext, |
| operands: Seq[GeneratedExpression], |
| returnType: InternalType, |
| nullCheck: Boolean): GeneratedExpression = { |
| // convert parameters for function (output boxing) |
| val parameters = prepareUDFArgs(ctx, nullCheck, operands, tableFunction) |
| |
| // generate function call |
| val functionReference = ctx.addReusableFunction(tableFunction) |
| val functionCallCode = |
| s""" |
| |${parameters.map(_.code).mkString("\n")} |
| |$functionReference.eval(${parameters.map(_.resultTerm).mkString(", ")}); |
| |""".stripMargin |
| |
| // has no result |
| GeneratedExpression( |
| functionReference, |
| NEVER_NULL, |
| functionCallCode, |
| returnType) |
| } |
| } |