Is your feature request related to a problem or challenge?

Multiple instances of match expressions over the PrimitiveType use a wildcard even though the enum is exhaustive. If more types were to be added to PrimitiveType, this wildcard would silently swallow usage of those types. Some of these instances currently throw ErrorKind::FeatureUnsupported. They also have hardcoded Timestamptz since it's the only unsupported type. Examples can be seen here and here.

This issue is to document and fix instances of wildcard usage in exhaustive enums.

Describe the solution you'd like

• Remove wildcard in exhaustive match expressions
• Add necessary attributes for exhaustive enums in match expressions

Willingness to contribute

I can contribute to this feature independently