hililiwei commented on code in PR #6752:
URL: https://github.com/apache/iceberg/pull/6752#discussion_r1098224917
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spark/v3.3/spark-extensions/src/main/antlr/org.apache.spark.sql.catalyst.parser.extensions/IcebergSqlExtensions.g4:
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@@ -74,6 +74,7 @@ statement
| ALTER TABLE multipartIdentifier SET IDENTIFIER_KW FIELDS fieldList
#setIdentifierFields
| ALTER TABLE multipartIdentifier DROP IDENTIFIER_KW FIELDS fieldList
#dropIdentifierFields
| ALTER TABLE multipartIdentifier createReplaceBranchClause
#createOrReplaceBranch
+ | ALTER TABLE multipartIdentifier DROP BRANCH identifier #dropBranch
Review Comment:
Do we need `IF EXISTS` ?
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