org.apache.flink.table.planner.plan.nodes.exec.batch.BatchExecBoundedStreamScan Maven / Gradle / Ivy

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This module bridges Table/SQL API and runtime. It contains all resources that are required during pre-flight and runtime phase. The content of this module is work-in-progress. It will replace flink-table-planner once it is stable. See FLINK-11439 and FLIP-32 for more details.

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/*
 * 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.plan.nodes.exec.batch;

import org.apache.flink.api.dag.Transformation;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.table.data.RowData;
import org.apache.flink.table.planner.codegen.CodeGeneratorContext;
import org.apache.flink.table.planner.delegation.PlannerBase;
import org.apache.flink.table.planner.plan.nodes.exec.ExecNode;
import org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase;
import org.apache.flink.table.planner.plan.nodes.exec.MultipleTransformationTranslator;
import org.apache.flink.table.planner.plan.utils.ScanUtil;
import org.apache.flink.table.planner.utils.JavaScalaConversionUtil;
import org.apache.flink.table.types.DataType;
import org.apache.flink.table.types.logical.RowType;

import java.util.Collections;
import java.util.List;
import java.util.Optional;

/**
 * Batch {@link ExecNode} to connect a given bounded {@link DataStream} and consume data from it.
 */
public class BatchExecBoundedStreamScan extends ExecNodeBase
        implements BatchExecNode, MultipleTransformationTranslator {
    private final DataStream dataStream;
    private final DataType sourceType;
    private final int[] fieldIndexes;
    private final List qualifiedName;

    public BatchExecBoundedStreamScan(
            DataStream dataStream,
            DataType sourceType,
            int[] fieldIndexes,
            List qualifiedName,
            RowType outputType,
            String description) {
        super(Collections.emptyList(), outputType, description);
        this.dataStream = dataStream;
        this.sourceType = sourceType;
        this.fieldIndexes = fieldIndexes;
        this.qualifiedName = qualifiedName;
    }

    @SuppressWarnings("unchecked")
    @Override
    protected Transformation translateToPlanInternal(PlannerBase planner) {
        final Transformation sourceTransform = dataStream.getTransformation();
        if (needInternalConversion()) {
            return ScanUtil.convertToInternalRow(
                    new CodeGeneratorContext(planner.getTableConfig()),
                    (Transformation