Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/18989#discussion_r133935887
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileFormat.scala
---
@@ -65,6 +65,18 @@ trait FileFormat {
}
/**
+ * Returns concrete column vector class names for each column to be used
in a columnar batch
+ * if this format supports returning columnar batch.
+ */
+ def vectorTypes(
+ sparkSession: SparkSession,
--- End diff --
Do we need to keep `sparkSession` and `dataSchema`?
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