| /* |
| * 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.plan.nodes.dataset |
| |
| import org.apache.calcite.plan.{RelOptCluster, RelOptCost, RelOptPlanner, RelTraitSet} |
| import org.apache.calcite.rel.`type`.RelDataType |
| import org.apache.calcite.rel.core.Calc |
| import org.apache.calcite.rel.metadata.RelMetadataQuery |
| import org.apache.calcite.rel.{RelNode, RelWriter} |
| import org.apache.calcite.rex._ |
| import org.apache.flink.api.common.functions.FlatMapFunction |
| import org.apache.flink.api.java.DataSet |
| import org.apache.flink.api.java.typeutils.RowTypeInfo |
| import org.apache.flink.table.api.{BatchQueryConfig, BatchTableEnvironment} |
| import org.apache.flink.table.calcite.FlinkTypeFactory |
| import org.apache.flink.table.codegen.FunctionCodeGenerator |
| import org.apache.flink.table.plan.nodes.CommonCalc |
| import org.apache.flink.table.plan.schema.RowSchema |
| import org.apache.flink.table.runtime.FlatMapRunner |
| import org.apache.flink.types.Row |
| |
| import scala.collection.JavaConverters._ |
| |
| /** |
| * Flink RelNode which matches along with LogicalCalc. |
| * |
| */ |
| class DataSetCalc( |
| cluster: RelOptCluster, |
| traitSet: RelTraitSet, |
| input: RelNode, |
| rowRelDataType: RelDataType, |
| calcProgram: RexProgram, |
| ruleDescription: String) |
| extends Calc(cluster, traitSet, input, calcProgram) |
| with CommonCalc |
| with DataSetRel { |
| |
| override def deriveRowType(): RelDataType = rowRelDataType |
| |
| override def copy(traitSet: RelTraitSet, child: RelNode, program: RexProgram): Calc = { |
| new DataSetCalc(cluster, traitSet, child, getRowType, program, ruleDescription) |
| } |
| |
| override def toString: String = calcToString(calcProgram, getExpressionString) |
| |
| override def explainTerms(pw: RelWriter): RelWriter = { |
| pw.input("input", getInput) |
| .item("select", selectionToString(calcProgram, getExpressionString)) |
| .itemIf("where", |
| conditionToString(calcProgram, getExpressionString), |
| calcProgram.getCondition != null) |
| } |
| |
| override def computeSelfCost(planner: RelOptPlanner, metadata: RelMetadataQuery): RelOptCost = { |
| val child = this.getInput |
| val rowCnt = metadata.getRowCount(child) |
| |
| computeSelfCost(calcProgram, planner, rowCnt) |
| } |
| |
| override def estimateRowCount(metadata: RelMetadataQuery): Double = { |
| val child = this.getInput |
| val rowCnt = metadata.getRowCount(child) |
| |
| estimateRowCount(calcProgram, rowCnt) |
| } |
| |
| override def translateToPlan( |
| tableEnv: BatchTableEnvironment, |
| queryConfig: BatchQueryConfig): DataSet[Row] = { |
| |
| val config = tableEnv.getConfig |
| |
| val inputDS = getInput.asInstanceOf[DataSetRel].translateToPlan(tableEnv, queryConfig) |
| |
| val generator = new FunctionCodeGenerator(config, false, inputDS.getType) |
| |
| val returnType = FlinkTypeFactory.toInternalRowTypeInfo(getRowType).asInstanceOf[RowTypeInfo] |
| |
| val projection = calcProgram.getProjectList.asScala.map(calcProgram.expandLocalRef) |
| val condition = if (calcProgram.getCondition != null) { |
| Some(calcProgram.expandLocalRef(calcProgram.getCondition)) |
| } else { |
| None |
| } |
| |
| val genFunction = generateFunction( |
| generator, |
| ruleDescription, |
| new RowSchema(getInput.getRowType), |
| new RowSchema(getRowType), |
| projection, |
| condition, |
| config, |
| classOf[FlatMapFunction[Row, Row]]) |
| |
| val runner = new FlatMapRunner(genFunction.name, genFunction.code, returnType) |
| |
| inputDS.flatMap(runner).name(calcOpName(calcProgram, getExpressionString)) |
| } |
| } |