IDENTITY columns not generated in DDL when using custom domains

[arvanus]

FlameRobin fails to generate GENERATED BY DEFAULT AS IDENTITY clauses in CREATE TABLE DDL scripts when the IDENTITY column uses a custom domain instead of a system domain. Steps to Reproduce

1. Create a custom domain: CREATE DOMAIN DOM_ID AS INTEGER;
2. Create a table with an IDENTITY column using the custom domain: CREATE TABLE TEST_TABLE ( ID DOM_ID GENERATED BY DEFAULT AS IDENTITY, NAME VARCHAR(50) );
3. Use FlameRobin's "Extract DDL" feature on the table
4. Observe the generated DDL

Expected Behavior

The generated DDL should include the IDENTITY clause: CREATE TABLE TEST_TABLE ( ID DOM_ID GENERATED BY DEFAULT AS IDENTITY, NAME VARCHAR(50) );

Actual Behavior

The generated DDL is missing the IDENTITY clause: CREATE TABLE TEST_TABLE ( ID DOM_ID, NAME VARCHAR(50) );