Zouxxyy commented on code in PR #7872:
URL: https://github.com/apache/hudi/pull/7872#discussion_r1105531548
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hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/execution/bulkinsert/RowCustomColumnsSortPartitioner.java:
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@@ -19,43 +19,70 @@
package org.apache.hudi.execution.bulkinsert;
import org.apache.hudi.common.model.HoodieRecord;
+import org.apache.hudi.common.table.HoodieTableConfig;
import org.apache.hudi.config.HoodieWriteConfig;
-import org.apache.hudi.table.BulkInsertPartitioner;
-
+import org.apache.spark.sql.Column;
import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
+import scala.collection.JavaConverters;
import java.util.Arrays;
+import java.util.stream.Collectors;
+
+import static org.apache.hudi.common.util.ValidationUtils.checkState;
+import static
org.apache.hudi.execution.bulkinsert.RDDCustomColumnsSortPartitioner.getOrderByColumnNames;
/**
- * A partitioner that does sorting based on specified column values for each
spark partitions.
+ * A partitioner that does local sorting for each RDD partition based on the
tuple of
+ * values of the columns configured for ordering.
*/
-public class RowCustomColumnsSortPartitioner implements
BulkInsertPartitioner<Dataset<Row>> {
+public class RowCustomColumnsSortPartitioner extends
RepartitioningBulkInsertPartitionerBase<Dataset<Row>> {
- private final String[] sortColumnNames;
+ private final String[] orderByColumnNames;
- public RowCustomColumnsSortPartitioner(HoodieWriteConfig config) {
- this.sortColumnNames = getSortColumnName(config);
+ public RowCustomColumnsSortPartitioner(HoodieWriteConfig config,
HoodieTableConfig tableConfig) {
+ super(tableConfig);
+ this.orderByColumnNames = getOrderByColumnNames(config);
+
+ checkState(orderByColumnNames.length > 0);
}
- public RowCustomColumnsSortPartitioner(String[] columnNames) {
- this.sortColumnNames = columnNames;
+ public RowCustomColumnsSortPartitioner(String[] columnNames,
HoodieTableConfig tableConfig) {
+ super(tableConfig);
+ this.orderByColumnNames = columnNames;
+
+ checkState(orderByColumnNames.length > 0);
}
@Override
- public Dataset<Row> repartitionRecords(Dataset<Row> records, int
outputSparkPartitions) {
- final String[] sortColumns = this.sortColumnNames;
- return records.sort(HoodieRecord.PARTITION_PATH_METADATA_FIELD,
sortColumns)
- .coalesce(outputSparkPartitions);
+ public Dataset<Row> repartitionRecords(Dataset<Row> dataset, int
targetPartitionNumHint) {
+ Dataset<Row> repartitionedDataset;
+
+ // NOTE: In case of partitioned table even "global" ordering (across all
RDD partitions) could
+ // not change table's partitioning and therefore there's no point in
doing global sorting
+ // across "physical" partitions, and instead we can reduce total
amount of data being
+ // shuffled by doing do "local" sorting:
Review Comment:
As far as I know, RowCustomColumnsSortPartitioner will only be used in
`cluster`. At this time, the files in the same `clusteringGroup` should already
be in one physical partition.
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