wdick commented on a change in pull request #23362: [MINOR][DOCS]Document
subquery support for the `table` parameter
URL: https://github.com/apache/spark/pull/23362#discussion_r243596762
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File path: sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
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@@ -235,6 +235,19 @@ class DataFrameReader private[sql](sparkSession:
SparkSession) extends Logging {
* Construct a `DataFrame` representing the database table accessible via
JDBC URL
* url named table and connection properties.
*
+ * The `table` parameter can be based on a derived table, which is generated
within the scope of
+ * a query FROM clause. For example, you could use this subquery as `table:
+ * {{{
+ * "(SELECT * FROM customers WHERE ...) AS tmp"
+ * }}}
Review comment:
Perfect! This is a part of the documentation, that I seam to have missed.
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