RussellSpitzer commented on code in PR #6304:
URL: https://github.com/apache/iceberg/pull/6304#discussion_r1034950972
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api/src/main/java/org/apache/iceberg/ScanTaskGroup.java:
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@@ -26,6 +26,24 @@
* @param <T> the type of scan tasks
*/
public interface ScanTaskGroup<T extends ScanTask> extends ScanTask {
+ /**
+ * Returns a grouping key for this task group.
+ *
+ * <p>Tasks may produce records that belong to a specific group of data
(e.g. partition). It may
Review Comment:
This description is a little too abstract for me to understand what the
grouping key is from this doc. I think grouping key needs to be defined first
here. Maybe
"A grouping key is a set of values that are common amongst all rows within
all tasks within the group. The values may be the result of transforming the
underlying data. For example, a grouping key may have the bucket ordinal
computed by applying a bucketing transformation to a column of the underlying
rows."
Wdyt?
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