Github user viirya commented on a diff in the pull request: https://github.com/apache/spark/pull/15987#discussion_r90797605 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala --- @@ -661,6 +661,36 @@ class Analyzer( // rule: ResolveDeserializer. case plan if containsDeserializer(plan.expressions) => plan + // Some commands (AlterTableDropPartitionCommand) use expressions, so we need to resolve. + case c: CommandWithExpression => + val catalogTable = catalog.getTableMetadata(c.getTableName) + + // We should not do this here in order to support general CommandWithExpression + if (catalogTable.tableType == CatalogTableType.VIEW) { + throw new AnalysisException( + "Cannot alter a view with ALTER TABLE. Please use ALTER VIEW instead") --- End diff -- Except `AlterTableDropPartitionCommand`, do we have other running commands which need this resolving? If not, I think we may not need to add this to `Analyzer` and create new abstraction `CommandWithExpression`.
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