openinx commented on a change in pull request #1818:
URL: https://github.com/apache/iceberg/pull/1818#discussion_r530152845
##########
File path: core/src/main/java/org/apache/iceberg/io/BaseTaskWriter.java
##########
@@ -51,39 +60,149 @@ protected BaseTaskWriter(PartitionSpec spec, FileFormat
format, FileAppenderFact
this.targetFileSize = targetFileSize;
}
+ protected PartitionSpec spec() {
+ return spec;
+ }
+
+ protected FileAppenderFactory<T> appenderFactory() {
+ return appenderFactory;
+ }
+
@Override
public void abort() throws IOException {
close();
// clean up files created by this writer
- Tasks.foreach(completedFiles)
+ Tasks.foreach(Iterables.concat(completedFiles, completedDeletes))
.throwFailureWhenFinished()
.noRetry()
.run(file -> io.deleteFile(file.path().toString()));
}
@Override
- public DataFile[] complete() throws IOException {
+ public WriterResult complete() throws IOException {
close();
- return completedFiles.toArray(new DataFile[0]);
+ return WriterResult.builder()
+ .addDataFiles(completedFiles)
+ .addDeleteFiles(completedDeletes)
+ .build();
+ }
+
+ protected abstract class BaseDeltaWriter implements Closeable {
+ private final RollingFileWriter dataWriter;
+
+ private final boolean enableEqDelete;
+ private RollingEqDeleteWriter eqDeleteWriter = null;
+ private SortedPosDeleteWriter<T> posDeleteWriter = null;
+ private StructLikeMap<FilePos> insertedRowMap = null;
+
+ public BaseDeltaWriter(PartitionKey partition, List<Integer>
equalityFieldIds, Schema schema) {
+ this.dataWriter = new RollingFileWriter(partition);
+
+ this.enableEqDelete = equalityFieldIds != null &&
!equalityFieldIds.isEmpty();
+ if (enableEqDelete) {
Review comment:
> Why use a delta writer if eq deletes are disabled?
Because I only want to expose the `BaseDeltaWriter` to compute engines, I
planed to make the `BaseRollingWriter` & `RollingFileWriter` &
`RollingEqDeleteWriter` to be `private`. To implement the compute-engine
specific `TaskWriter`, the only thing we need to do is implementing the
`asKey` and `asCopiedKey` methods and customizing the policy to dispatch
records to `DeltaWriter`.
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