danny0405 commented on a change in pull request #9712: [FLINK-13656] 
[sql-parser][table-planner][table-planner-blink] Bump Calcite dependency to 
1.21.0
URL: https://github.com/apache/flink/pull/9712#discussion_r327908141
 
 

 ##########
 File path: 
flink-table/flink-sql-parser/src/main/codegen/includes/parserImpls.ftl
 ##########
 @@ -644,26 +532,35 @@ void FieldNameTypeCommaList(
 }
 
 /**
-* Parse Row type, we support both Row(name1 type1, name2 type2) and Row<name1 
type1, name2 type2>.
-* Every item type can have suffix of `NULL` or `NOT NULL` to indicate if this 
type is nullable.
-* i.e. Row(f0 int not null, f1 varchar null).
+* Parse Row type, we support both Row(name1 type1, name2 type2)
+* and Row&lt;name1 type1, name2 type2&gt;.
+* Every item type can have a suffix of `NULL` or `NOT NULL` to indicate if 
this type is nullable.
+* i.e. Row(f0 int not null, f1 varchar null). Default is nullable.
 */
-SqlIdentifier SqlRowType() :
+SqlTypeNameSpec ExtendedSqlRowTypeName() :
 
 Review comment:
   Thanks, i have added the comments.

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