Function sql::pure::purify

pub fn purify(
    catalog: &dyn SessionCatalog, 
    stmt: Statement<Raw>
) -> impl Future<Output = Result<Statement<Raw>, Error>>

Purifies a statement, removing any dependencies on external state.

See the section on purification in the crate documentation for details.

Note that purification is asynchronous, and may take an unboundedly long time to complete. As a result purification does not have access to a SessionCatalog, as that would require locking access to the catalog for an unbounded amount of time.