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_r341499950
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File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
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@@ -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:
Let's simply remove this syntax. We have ALTER TABLE CHANGE COLUMN and ALTER
TABLE RENAME COLUMN, which is good enough to me.
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