I'm building a new dialect for the FoundationDB SQL layer. I've merged in the recent metamodel merge into my working branch and ran across this new failure. GeneratedIdColumnHbmTests#testNativeId() fails with an assertion error. This is caused by entityBinding.getPrimaryTable().getPrimaryKey().getColumns().get( 0 ).isIdentity() returns false, which is should return true. The only place the column.isIdentity() is set true is in org.hibernate.metamodel.internal.Binder#bindIdentifierGenerator(line 1491). And this is based upon if the entityIdentifier.getIdentifierGenerator(), which in turn delegates to Dialect#getNativeIdentifierGeneratorClass(), returns an IdentityGenerator.class The problem here is that a dialect can support IDENTITY column, but not use (or return) IdentityGenerator from the getNativeIdentifierClass(). FoundationdDB SQL layer supports both IDENTITY and sequences, as does the PostgreSQLDialect. Is this a bug in Binder? that the test should be better formed to set the identity column. Is this a new limitation on Dialects, in that they can no longer correctly support both IDENTITY and sequences? What is the correct way to fix this problem?