zhipengmao-db commented on code in PR #47614:
URL: https://github.com/apache/spark/pull/47614#discussion_r1719755167
##########
sql/api/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBaseParser.g4:
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@@ -1267,7 +1267,22 @@ colDefinitionOption
;
generationExpression
- : GENERATED ALWAYS AS LEFT_PAREN expression RIGHT_PAREN
+ : GENERATED ALWAYS AS LEFT_PAREN expression RIGHT_PAREN
#generatedColumn
+ | GENERATED (ALWAYS | BY DEFAULT) AS IDENTITY identityColSpec?
#identityColumn
+ ;
+
+identityColSpec
+ : LEFT_PAREN identityColSpecOption* RIGHT_PAREN
+ ;
+
+identityColSpecOption
+ : START WITH start=identityStartOrStep
+ | INCREMENT BY step=identityStartOrStep
+ ;
+
+identityStartOrStep
+ : MINUS? INTEGER_VALUE
+ | MINUS? BIGINT_LITERAL
Review Comment:
It seems we don't. I cannot find it.
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