[GitHub] [iceberg] openinx commented on a change in pull request #2560: Spark: add spark extension for identifier fields

[GitBox <gi...@apache.org>]

openinx commented on a change in pull request #2560:
URL: https://github.com/apache/iceberg/pull/2560#discussion_r628676396



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File path: spark3-extensions/src/main/antlr/org.apache.spark.sql.catalyst.parser.extensions/IcebergSqlExtensions.g4
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@@ -71,6 +71,8 @@ statement
     | ALTER TABLE multipartIdentifier DROP PARTITION FIELD transform                        #dropPartitionField
     | ALTER TABLE multipartIdentifier REPLACE PARTITION FIELD transform WITH transform (AS name=identifier)? #replacePartitionField
     | ALTER TABLE multipartIdentifier WRITE writeSpec                                       #setWriteDistributionAndOrdering
+    | ALTER TABLE multipartIdentifier REPLACE ROW_IDENTIFIER FIELDS '(' fields+=identifier (',' fields+=identifier)* ')' #replaceIdentifierFields

Review comment:
       +1 for @yyanyy 's comment.




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