maropu commented on a change in pull request #31548:
URL: https://github.com/apache/spark/pull/31548#discussion_r578077671
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
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@@ -136,6 +136,29 @@ case class UnresolvedTableValuedFunction(
override lazy val resolved = false
}
+/**
+ * A table-valued command, e.g.
+ * {{{
+ * select tableName from command("show tables");
Review comment:
We cannot add a new built-in function for this purpose instead? The
implementation will be simpler than the current syntax-based approach, I think.
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