database/sql/driver.Driver implementations can be nested, with each
layer adding additional functionality. If pgx/stdlib.Driver is wrapped
in another driver.Driver implementation, AcquireConn will error,
detecting that the *sql.DB's driver is not (directly) pgx.Driver.
It looks like it should be possible to support the current functionality
without requiring that the top-level Driver be pgx/stdlib.Driver, but
it requires using a global map of fakeTxConns instead of a per-Driver
map of fakeTxConns.
Is this reasonable?
Jackson Owens
14f1f2aa01