Update SQL features list

src/backend/catalog/sql_features.txt

@@ -229,7 +229,7 @@ F311	Schema definition statement	02	CREATE TABLE for persistent base tables	YES
 F311	Schema definition statement	03	CREATE VIEW	YES	
 F311	Schema definition statement	04	CREATE VIEW: WITH CHECK OPTION	YES	
 F311	Schema definition statement	05	GRANT statement	YES	
-F312	MERGE statement			NO	Consider INSERT ... ON CONFLICT DO UPDATE
+F312	MERGE statement			NO	consider INSERT ... ON CONFLICT DO UPDATE
 F313	Enhanced MERGE statement			NO	
 F314	MERGE statement with DELETE branch			NO	
 F321	User authorization			YES	
@@ -383,7 +383,7 @@ S274	Multisets of reference types			NO
 S275	Advanced multiset support			NO	
 S281	Nested collection types			NO	
 S291	Unique constraint on entire row			NO	
-S301	Enhanced UNNEST			NO	
+S301	Enhanced UNNEST			YES	
 S401	Distinct types based on array types			NO	
 S402	Distinct types based on distinct types			NO	
 S403	ARRAY_MAX_CARDINALITY			NO	
@@ -481,8 +481,7 @@ T501	Enhanced EXISTS predicate			YES
 T502	Period predicates			NO	
 T511	Transaction counts			NO	
 T521	Named arguments in CALL statement			NO	
-T522	Default values for IN parameters of SQL-invoked procedures			NO	
-T541	Updatable table references			NO	
+T522	Default values for IN parameters of SQL-invoked procedures			NO	supported except DEFAULT key word in invocation
 T551	Optional key words for default syntax			YES	
 T561	Holdable locators			NO	
 T571	Array-returning external SQL-invoked functions			NO	
@@ -490,7 +489,7 @@ T572	Multiset-returning external SQL-invoked functions			NO
 T581	Regular expression substring function			YES	
 T591	UNIQUE constraints of possibly null columns			YES	
 T601	Local cursor references			NO	
-T611	Elementary OLAP operations			NO	most forms supported
+T611	Elementary OLAP operations			YES	
 T612	Advanced OLAP operations			NO	some forms supported
 T613	Sampling			YES	
 T614	NTILE function			YES