Error in Nullable fields

Hello.

I have problems when I do a Select with fields declared as Nullable in a ClickHouse Database.

Field1 String,
Field2 Nullable(String),

Example:
SELECT Field1 FROM Table1 --> WORKS !!

SELECT Field1, Field2 FROM Table1 ERROR!!! -- "No field class for Nullable(String)"


No source files or tests are named. Start by reproducing the SELECT against a ClickHouse table containing String and Nullable(String) fields, then trace how the returned Nullable(String) type is mapped; done means selecting both fields succeeds without the reported error.

Written by the indexing model from the issue text.