RussellSpitzer commented on a change in pull request #3676:
URL: https://github.com/apache/iceberg/pull/3676#discussion_r826194666
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File path: core/src/main/java/org/apache/iceberg/actions/BinPackStrategy.java
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@@ -155,9 +155,12 @@ public RewriteStrategy options(Map<String, String>
options) {
public Iterable<List<FileScanTask>> planFileGroups(Iterable<FileScanTask>
dataFiles) {
ListPacker<FileScanTask> packer = new
BinPacking.ListPacker<>(maxGroupSize, 1, false);
List<List<FileScanTask>> potentialGroups = packer.pack(dataFiles,
FileScanTask::length);
+
return potentialGroups.stream().filter(group ->
- group.size() >= minInputFiles || sizeOfInputFiles(group) >
targetFileSize ||
- group.stream().anyMatch(this::taskHasTooManyDeletes)
+ (group.size() >= minInputFiles && group.size() > 1) ||
+ sizeOfInputFiles(group) > targetFileSize ||
+ group.stream().anyMatch(this::taskHasTooManyDeletes) ||
+ (group.stream().anyMatch(this::taskHasDeletes) && group.size()
== 1)
Review comment:
But you've changed the code here, we have
1. More than one file in the group and minInputFiles statisfied
2. A group is larger than the maxFile size (needs to be split)
3. A group (regardless of number of files) has too many deletes
4. A group (if it has 1 file) has deletes
Doesn't 3 also cover 4?
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