Table & columns case sensitiveness

[maoueh]

It appears that table & column names must all be provided in lower case. I'm not sure yet if it's a bug in the sink code or it's a Postgres limitation that all identifiers are returned lowered case.

This means passing Transfer fails for table name even if in the schema SQL it was written Transfer. Same thing with column names.

If it's indeed a Postgres thing, we should probably normalize the table/column to lower case when creating them directly to avoid mistakes.

Otherwise if it's a bug in the sink code, we must decide what is the best course here (respect casing or always keep lower case).