docs: note of caution about GENERATED BY DEFAULT AS IDENTITY.

project-tsurugi · Aug 29, 2024 · aac795f · aac795f
1 parent 1523659
commit aac795f
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/docs/sql-features.md b/docs/sql-features.md
@@ -89,6 +89,9 @@ DDL should be issued from single thread when there is no on-going DML processing
 ----
 note:
 
+Limitation: Columns defined as `GENERATED BY DEFAULT AS IDENTITY` cannot be modified after the row has been created.
+Currently, they function similarly to `GENERATED ALWAYS AS IDENTITY`.
+
 `CREATE TABLE ... AS SELECT ...` is not supported.
 
 ### CREATE INDEX