cloud-fan commented on a change in pull request #26338: [SPARK-29680][SQL] 
ALTER TABLE CHANGE COLUMN should look up catalog/table like v2 commands
URL: https://github.com/apache/spark/pull/26338#discussion_r341003895
 
 

 ##########
 File path: 
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
 ##########
 @@ -151,7 +151,7 @@ statement
     | ALTER TABLE multipartIdentifier
         (ALTER | CHANGE) COLUMN? qualifiedName
         (TYPE dataType)? (COMMENT comment=STRING)? colPosition?        
#alterTableColumn
-    | ALTER TABLE tableIdentifier partitionSpec?
+    | ALTER TABLE multipartIdentifier partitionSpec?
 
 Review comment:
   hmm, the parser rule above seems to include this one?

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