JNSimba commented on a change in pull request #5375: URL: https://github.com/apache/incubator-doris/pull/5375#discussion_r611195299
########## File path: extension/flink-doris-connector/src/main/java/org/apache/doris/flink/serialization/RowBatch.java ########## @@ -0,0 +1,304 @@ +// 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.doris.flink.serialization; + +import com.google.common.base.Preconditions; +import org.apache.arrow.memory.RootAllocator; + +import org.apache.arrow.vector.BigIntVector; +import org.apache.arrow.vector.BitVector; +import org.apache.arrow.vector.DecimalVector; +import org.apache.arrow.vector.FieldVector; +import org.apache.arrow.vector.Float4Vector; +import org.apache.arrow.vector.Float8Vector; +import org.apache.arrow.vector.IntVector; +import org.apache.arrow.vector.SmallIntVector; +import org.apache.arrow.vector.TinyIntVector; +import org.apache.arrow.vector.VarBinaryVector; +import org.apache.arrow.vector.VarCharVector; +import org.apache.arrow.vector.VectorSchemaRoot; +import org.apache.arrow.vector.ipc.ArrowStreamReader; +import org.apache.arrow.vector.types.Types; +import org.apache.doris.flink.exception.DorisException; +import org.apache.doris.flink.rest.models.Schema; +import org.apache.doris.thrift.TScanBatchResult; + +import org.apache.flink.table.data.DecimalData; +import org.apache.flink.table.data.StringData; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.ByteArrayInputStream; +import java.io.IOException; +import java.math.BigDecimal; +import java.util.ArrayList; +import java.util.List; +import java.util.NoSuchElementException; + +/** + * row batch data container. + */ +public class RowBatch { + private static Logger logger = LoggerFactory.getLogger(RowBatch.class); + + public static class Row { + private List<Object> cols; + + Row(int colCount) { + this.cols = new ArrayList<>(colCount); + } + + public List<Object> getCols() { + return cols; + } + + public void put(Object o) { + cols.add(o); + } + } + + // offset for iterate the rowBatch + private int offsetInRowBatch = 0; + private int rowCountInOneBatch = 0; + private int readRowCount = 0; + private List<Row> rowBatch = new ArrayList<>(); + private final ArrowStreamReader arrowStreamReader; + private final VectorSchemaRoot root; + private List<FieldVector> fieldVectors; + private RootAllocator rootAllocator; + private final Schema schema; + + public List<Row> getRowBatch() { + return rowBatch; + } + + public RowBatch(TScanBatchResult nextResult, Schema schema) throws DorisException { + this.schema = schema; + this.rootAllocator = new RootAllocator(Integer.MAX_VALUE); + this.arrowStreamReader = new ArrowStreamReader( + new ByteArrayInputStream(nextResult.getRows()), + rootAllocator + ); + this.offsetInRowBatch = 0; + try { + this.root = arrowStreamReader.getVectorSchemaRoot(); + while (arrowStreamReader.loadNextBatch()) { + fieldVectors = root.getFieldVectors(); + if (fieldVectors.size() != schema.size()) { + logger.error("Schema size '{}' is not equal to arrow field size '{}'.", + fieldVectors.size(), schema.size()); + throw new DorisException("Load Doris data failed, schema size of fetch data is wrong."); + } + if (fieldVectors.size() == 0 || root.getRowCount() == 0) { + logger.debug("One batch in arrow has no data."); + continue; + } + rowCountInOneBatch = root.getRowCount(); + // init the rowBatch + for (int i = 0; i < rowCountInOneBatch; ++i) { + rowBatch.add(new Row(fieldVectors.size())); + } + convertArrowToRowBatch(); + readRowCount += root.getRowCount(); + } + } catch (Exception e) { + logger.error("Read Doris Data failed because: ", e); + throw new DorisException(e.getMessage()); + } finally { + close(); + } + } + + public boolean hasNext() { + if (offsetInRowBatch < readRowCount) { + return true; + } + return false; + } + + private void addValueToRow(int rowIndex, Object obj) { + if (rowIndex > rowCountInOneBatch) { + String errMsg = "Get row offset: " + rowIndex + " larger than row size: " + + rowCountInOneBatch; + logger.error(errMsg); + throw new NoSuchElementException(errMsg); + } + rowBatch.get(readRowCount + rowIndex).put(obj); + } + + public void convertArrowToRowBatch() throws DorisException { + try { Review comment: Modification, submitted soon -- This is an automated message from the Apache Git Service. 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