xuefuz commented on a change in pull request #6970: [FLINK-10696][Table API &
SQL]Add APIs to ExternalCatalog, CrudExternalCatalog and
InMemoryCrudExternalCatalog for views and UDFs
URL: https://github.com/apache/flink/pull/6970#discussion_r230159003
##########
File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/catalog/CrudExternalCatalog.scala
##########
@@ -103,4 +105,86 @@ trait CrudExternalCatalog extends ExternalCatalog {
@throws[CatalogNotExistException]
def alterSubCatalog(name: String, catalog: ExternalCatalog,
ignoreIfNotExists: Boolean): Unit
+ /**
+ * Adds a view to this catalog.
+ *
+ * @param viewName The name of the view to add.
+ * @param view The view to add.
+ * @param ignoreIfExists Flag to specify behavior if a view with the given
name already exists:
+ * if set to false, throw an exception,
+ * if set to true, nothing happens.
+ * @throws ViewAlreadyExistException thrown if view already exists and
ignoreIfExists is false
+ */
+ @throws[ViewAlreadyExistException]
+ def createView(viewName: String, view: String, ignoreIfExists: Boolean): Unit
+
+ /**
+ * Deletes a view from this catalog.
+ *
+ * @param viewName Name of the view to delete.
+ * @param ignoreIfNotExists Flag to specify behavior if the view does not
exist:
+ * if set to false, throw an exception,
+ * if set to true, nothing happens.
+ * @throws ViewNotExistException thrown if the view does not exist in
the catalog
+ */
+ @throws[ViewNotExistException]
+ def dropView(viewName: String, ignoreIfNotExists: Boolean): Unit
+
+ /**
+ * Modifies an existing view of this catalog.
+ *
+ * @param viewName The name of the view to modify.
+ * @param view The new view which replaces the existing table.
Review comment:
Typo: table -> view
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