gengliangwang commented on a change in pull request #30273:
URL: https://github.com/apache/spark/pull/30273#discussion_r519895339
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File path:
sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/TableProvider.java
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@@ -77,8 +77,10 @@
/**
* Returns true if the source has the ability of accepting external table
metadata when getting
- * tables. The external table metadata includes user-specified schema from
- * `DataFrameReader`/`DataStreamReader` and schema/partitioning stored in
Spark catalog.
+ * tables. The external table metadata includes:
+ * 1. For table reader: user-specified schema from
`DataFrameReader`/`DataStreamReader` and
+ * schema/partitioning stored in Spark catalog.
+ * 2. For table writer: the schema of the input `Dataframe` of
`DataframeWriter`.
Review comment:
Yes. I have just updated the code
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