Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20397#discussion_r164349078
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/sources/v2/reader/Distribution.java
---
@@ -21,9 +21,9 @@
/**
* An interface to represent data distribution requirement, which
specifies how the records should
- * be distributed among the {@link ReadTask}s that are returned by
- * {@link DataSourceV2Reader#createReadTasks()}. Note that this interface
has nothing to do with
- * the data ordering inside one partition(the output records of a single
{@link ReadTask}).
+ * be distributed among the {@link DataReaderFactory}s that are returned by
--- End diff --
`distributed among the data partition(one DataReader outputs data for one
partition).`
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