Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20397#discussion_r164348145
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/sources/v2/reader/DataSourceV2Reader.java
---
@@ -63,7 +63,7 @@
StructType readSchema();
/**
- * Returns a list of read tasks. Each task is responsible for outputting
data for one RDD
+ * Returns a list of reader factories. Each task is responsible for
outputting data for one RDD
--- End diff --
`Each factory is ...`
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