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[FLINK-28009] Optimize data split #151

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[FLINK-28009] Optimize data split #151

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5e74160
Optimize data split
kaori-seasons Jun 11, 2022
d081eb1
[FLINK-27845](https://issues.apache.org/jira/browse/FLINK-27845)
kaori-seasons Jun 18, 2022
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44 changes: 26 additions & 18 deletions ...e-core/src/main/java/org/apache/flink/table/store/table/source/DefaultSplitGenerator.java
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Original file line number Diff line number Diff line change
Expand Up @@ -22,9 +22,9 @@
import org.apache.flink.table.store.file.data.DataFileMeta;
import org.apache.flink.table.store.file.utils.FileStorePathFactory;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/** Default implementation of {@link SplitGenerator}. The whole bucket is marked as one split. */
public class DefaultSplitGenerator implements SplitGenerator {
Expand All @@ -38,23 +38,31 @@ public DefaultSplitGenerator(FileStorePathFactory pathFactory) {
@Override
public List<Split> generate(
Map<BinaryRowData, Map<Integer, List<DataFileMeta>>> groupedDataFileMetas) {
List<Split> splits = new ArrayList<>();
for (Map.Entry<BinaryRowData, Map<Integer, List<DataFileMeta>>> entryWithPartition :
groupedDataFileMetas.entrySet()) {
BinaryRowData partition = entryWithPartition.getKey();
for (Map.Entry<Integer, List<DataFileMeta>> entryWithBucket :
entryWithPartition.getValue().entrySet()) {
int bucket = entryWithBucket.getKey();
splits.add(
new Split(
partition,
bucket,
entryWithBucket.getValue(),
pathFactory
.createDataFilePathFactory(partition, bucket)
.bucketPath()));
}
}
List<Split> splits =
groupedDataFileMetas
.entrySet()
.stream()
.flatMap(
entry ->
entry.getValue().entrySet().stream()
.map(
v -> {
BinaryRowData partition =
entry.getKey();
int bucket = v.getKey();
List<DataFileMeta> dataFileMetaList =
v.getValue();
return new Split(
partition,
bucket,
dataFileMetaList,
pathFactory
.createDataFilePathFactory(
partition,
bucket)
.bucketPath());
}))
.collect(Collectors.toList());
return splits;
}
}