GeezerVison

dotnet ef dbcontext optimize --nativeaot failed because the Firebird type mappings had no public static Default property. Every Fb*TypeMapping now has one.
The generated code recreates a mapping as Default.Clone(...) from the standard RelationalTypeMappingParameters only, so FbDateTimeTypeMapping, FbStringTypeMapping and FbTimeSpanTypeMapping additionally expose FbDbType and Clone(FbDbType), and the new FbCSharpRuntimeAnnotationCodeGenerator emits that Clone when the FbDbType differs from the one of Default (e.g. DATE vs TIMESTAMP, CHAR vs VARCHAR).

The solutions employed here follow the same approach as the postgresql provider. So the generation of the Clone method when the type mapping isn't the exact mapping from Default.

This code has been generated by AI, and was manually reviewed by me.

I think this also covers a small part of issue #1096, but only the part where precompiled queries and models from efcore will work.