Create a version of Identifier that handles qualified identifiers #286
Description
Use case
We often want to refer to qualified identifiers (e.g., table.column). Right now, the Identifier type only handles a single level of identifiers. As far as I know, Clickhouse only supports two levels of nesting (there are no schemas or other objects that would require quoting foo.bar.baz); however, it is perfectly legal for an Identifier to include a . character.
Describe the solution you'd like
A new type
pub struct ScopedIdentifier<'a, 'b>(pub &'a str, pub &'b str)This should serialize as follows:
ScopedIdentifier('foo', 'bar') -> `foo`.`bar`
ScopedIdentifier('', 'bar') -> `bar`
ScopedIdentifier('foo', '') -> `foo`.``Describe the alternatives you've considered
Right now I'm doing this in my own query generation with format!() and it's bad.