Eric5553 commented on a change in pull request #27897: [SPARK-31113][SQL] Add
SHOW VIEWS command
URL: https://github.com/apache/spark/pull/27897#discussion_r401068120
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/statements.scala
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@@ -343,6 +343,15 @@ case class ShowTableStatement(
partitionSpec: Option[TablePartitionSpec])
extends ParsedStatement
+/**
+ * A SHOW VIEWS statement, as parsed from SQL.
+ */
+case class ShowViewsStatement(
Review comment:
@cloud-fan I did the implementation and got two more questions:
1. With the v2 command style, we need to extend the `CatalogPlugin` to
support view related interface. Which way do you prefer, add listViews function
to `TableCatalog` or add new interface `SupportViews`?
2. The current `CatalogPlugin` also does not support `isTemporaryTable`
check, so the v2 `ShowTablesExec` and `ShowViewsExec` can not support the
isTemporary output column. Do we need to handle it here?
Directly calling `SessionCatalog` API instead of 'CatalogPlugin' seems not
elegant here, right?
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