Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/14746#discussion_r76641967 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/command/views.scala --- @@ -105,7 +96,14 @@ case class CreateViewCommand( } val sessionState = sparkSession.sessionState - if (isTemporary) { + // 1) CREATE VIEW: create a temp view when users explicitly specify the keyword TEMPORARY; + // otherwise, create a permanent view no matter whether the temporary view + // with the same name exists or not. + // 2) ALTER VIEW: alter the temporary view if the temp view exists; otherwise, try to alter + // the permanent view. Here, it follows the same resolution like DROP VIEW, + // since users are unable to specify the keyword TEMPORARY. + if (viewType == ViewType.Temporary || + (viewType != ViewType.Permanent && sessionState.catalog.isTemporaryTable(name))) { --- End diff -- Sure, let me change it. Thanks!
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