Commits on Feb 9, 2023

1. tokio-postgres: add execute_prepared function …

   As it says in the documentation:
   
   > This function is identical to `execute_raw` except that:
   >
   > 1. The returned future does not borrow the parameters or `self`.
   > 2. The type of the returned future does not depend on the parameters.
   > 3. If multiple such futures are being used concurrently, then they are
   >    executed on the server in the order in which this function was
   >    called, regardless of the order in which the futures are polled.
   > 4. This function can only be used with prepared statements.
   
   This has the following additional advantages:
   
   1. Multiple non-homogeneous `execute` futures can be stored in a
      collection without having to box the futures.
   2. The parameters can be temporaries that do not need to out-live the
      futures.
   3. We can rely on the order in which the futures reach the server
      without having to rely on polling order which might not always be
      documented.

   

   mahkoh committed Feb 9, 2023
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