| /* |
| * 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._ |
| import org.apache.calcite.rel.RelNode |
| import org.apache.calcite.rel.`type`.RelDataType |
| import org.apache.calcite.rel.metadata.RelMetadataQuery |
| import org.apache.calcite.rex.RexNode |
| import org.apache.flink.api.java.DataSet |
| import org.apache.flink.table.api.{BatchQueryConfig, BatchTableEnvironment, TableException, Types} |
| import org.apache.flink.table.calcite.FlinkTypeFactory |
| import org.apache.flink.table.plan.nodes.PhysicalTableSourceScan |
| import org.apache.flink.table.plan.schema.RowSchema |
| import org.apache.flink.table.sources._ |
| import org.apache.flink.types.Row |
| |
| /** Flink RelNode to read data from an external source defined by a [[BatchTableSource]]. */ |
| class BatchTableSourceScan( |
| cluster: RelOptCluster, |
| traitSet: RelTraitSet, |
| table: RelOptTable, |
| tableSource: BatchTableSource[_], |
| selectedFields: Option[Array[Int]]) |
| extends PhysicalTableSourceScan(cluster, traitSet, table, tableSource, selectedFields) |
| with BatchScan { |
| |
| override def deriveRowType(): RelDataType = { |
| val flinkTypeFactory = cluster.getTypeFactory.asInstanceOf[FlinkTypeFactory] |
| TableSourceUtil.getRelDataType( |
| tableSource, |
| selectedFields, |
| streaming = false, |
| flinkTypeFactory) |
| } |
| |
| override def computeSelfCost (planner: RelOptPlanner, metadata: RelMetadataQuery): RelOptCost = { |
| val rowCnt = metadata.getRowCount(this) |
| planner.getCostFactory.makeCost(rowCnt, rowCnt, rowCnt * estimateRowSize(getRowType)) |
| } |
| |
| override def copy(traitSet: RelTraitSet, inputs: java.util.List[RelNode]): RelNode = { |
| new BatchTableSourceScan( |
| cluster, |
| traitSet, |
| getTable, |
| tableSource, |
| selectedFields |
| ) |
| } |
| |
| override def copy( |
| traitSet: RelTraitSet, |
| newTableSource: TableSource[_]): PhysicalTableSourceScan = { |
| |
| new BatchTableSourceScan( |
| cluster, |
| traitSet, |
| getTable, |
| newTableSource.asInstanceOf[BatchTableSource[_]], |
| selectedFields |
| ) |
| } |
| |
| override def translateToPlan( |
| tableEnv: BatchTableEnvironment, |
| queryConfig: BatchQueryConfig): DataSet[Row] = { |
| |
| val fieldIndexes = TableSourceUtil.computeIndexMapping( |
| tableSource, |
| isStreamTable = false, |
| selectedFields) |
| |
| val config = tableEnv.getConfig |
| val inputDataSet = tableSource.getDataSet(tableEnv.execEnv).asInstanceOf[DataSet[Any]] |
| val outputSchema = new RowSchema(this.getRowType) |
| |
| // check that declared and actual type of table source DataSet are identical |
| if (inputDataSet.getType != tableSource.getReturnType) { |
| throw new TableException(s"TableSource of type ${tableSource.getClass.getCanonicalName} " + |
| s"returned a DataSet of type ${inputDataSet.getType} that does not match with the " + |
| s"type ${tableSource.getReturnType} declared by the TableSource.getReturnType() method. " + |
| s"Please validate the implementation of the TableSource.") |
| } |
| |
| // get expression to extract rowtime attribute |
| val rowtimeExpression: Option[RexNode] = TableSourceUtil.getRowtimeExtractionExpression( |
| tableSource, |
| selectedFields, |
| cluster, |
| tableEnv.getRelBuilder, |
| Types.SQL_TIMESTAMP |
| ) |
| |
| // ingest table and convert and extract time attributes if necessary |
| convertToInternalRow( |
| outputSchema, |
| inputDataSet, |
| fieldIndexes, |
| config, |
| rowtimeExpression) |
| } |
| } |