[GitHub] dongjoon-hyun commented on a change in pull request #23742: [SPARK-26835][DOCS] Document configuration properties of Spark SQL Generic Load/Save Functions

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dongjoon-hyun commented on a change in pull request #23742: [SPARK-26835][DOCS] Document configuration properties of Spark SQL Generic Load/Save Functions
URL: https://github.com/apache/spark/pull/23742#discussion_r254985504
 
 

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 File path: docs/sql-data-sources-load-save-functions.md
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 @@ -41,6 +41,11 @@ name (i.e., `org.apache.spark.sql.parquet`), but for built-in sources you can al
 names (`json`, `parquet`, `jdbc`, `orc`, `libsvm`, `csv`, `text`). DataFrames loaded from any data
 source type can be converted into other types using this syntax.
 
+For built-in sources, the available extra options are documented in the API documentation,
+on the method corresponding to the format (For example `org.apache.spark.sql.DataFrameWriter.csv`).
+Check the documentation of methods in `org.apache.spark.sql.DataFrameReader` for extra options of
+`read` operations and `org.apache.spark.sql.DataFrameWriter` for extra options of `write` operations.
 
 Review comment:
   Thank you for your first contribution, @peter-gergely-horvath .
   
   BTW, the title seems to be misleading because it's too broader (`Document configuration properties...`?) than the PR content. This is just adding a pointer. And, as you claimed at the JIRA, the added sentence doesn't cover external Parquet/ORC options at all, too.
   
   Could you update the PR title and description to be specific to what this PR contribute?

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