Message Title

So you can probably make it work by using a specific dialect as right now the default PostgreSQL dialect is all based on sequences.

Maybe something along the lines of the following could work. You will probably need to dig a bit more to properly implement IdentityColumnSupport depending on PostgreSQL capabilities.

public class PostgreSQLIdentityDialect extends PostgreSQL95Dialect {

	@Override
	public IdentityColumnSupport getIdentityColumnSupport() {
		return new IdentityColumnSupportImpl() {

			@Override
			public boolean supportsIdentityColumns() {
				return true;
			}

			@Override
			public boolean supportsInsertSelectIdentity() {
				// dunno about this one
				return ...;
			}

			@Override
			public boolean hasDataTypeInIdentityColumn() {
				return true;
			}

			@Override
			public String getIdentityColumnString(int type) {
				return "generated by default as identity";
			}
		};
	}

	@Override
	public String getNativeIdentifierGeneratorStrategy() {
		return "identity";
	}
}