Add some comments to some SQL features

Otherwise, it could be confusing to a reader that some of these
well-publicized features are simply listed as unsupported without
further explanation.

diff --git a/src/backend/catalog/sql_features.txt b/src/backend/catalog/sql_features.txt
index d83d0bd88aeac24e917002ac33b30d4d5ea8b2c4..1e6f5c1971d1a2a60d90f019c0cf7544d88324c5 100644 (file)
--- a/src/backend/catalog/sql_features.txt
+++ b/src/backend/catalog/sql_features.txt
@@ -432,8 +432,8 @@ T171    LIKE clause in table definition         YES
 T172   AS subquery clause in table definition          YES 
 T173   Extended LIKE clause in table definition            YES 
 T174   Identity columns            YES 
-T175   Generated columns           NO  
-T176   Sequence generator support          NO  
+T175   Generated columns           NO  mostly supported
+T176   Sequence generator support          NO  supported except for NEXT VALUE FOR
 T177   Sequence generator support: simple restart option           YES 
 T178   Identity columns:  simple restart option            YES 
 T180   System-versioned tables         NO