huaxingao commented on a change in pull request #26303: [SPARK-29643][SQL]
ALTER TABLE (DROP PARTITION) should look up catalog/table like v2 commands
URL: https://github.com/apache/spark/pull/26303#discussion_r340889336
##########
File path:
sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
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@@ -164,7 +164,7 @@ statement
partitionSpec+
#addTablePartition
| ALTER TABLE tableIdentifier
from=partitionSpec RENAME TO to=partitionSpec
#renameTablePartition
- | ALTER TABLE tableIdentifier
+ | ALTER TABLE multipartIdentifier
DROP (IF EXISTS)? partitionSpec (',' partitionSpec)* PURGE?
#dropTablePartitions
| ALTER VIEW tableIdentifier
Review comment:
```ALTER TABLE ... DROP PARTITION``` has an optional ```PURGE``` in the end,
but ```ALTER TABLE``` doesn't. I guess keep them separated? They use the same
parser rule, though.
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