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#### ExecutionRequest concept

An execution request represents a SQL statement to be executed by the server, plus any required parameters. It may model a plain text query, a client-side formatted query with parameters, or a prepared statement handle with parameters.

Formally, a type `T` is a `ExecutionRequest` if it fulfills any of the following:

- It is convertible to `string_view`. In this case, the execution request contains a text query to be run by the server.
- An instantiation of the `bound_statement_tuple` class, or a (possibly cv-qualified) reference to it.
- An instantiation of the `bound_statement_iterator_range` class, or a (possibly cv-qualified) reference to it.
- An instantiation of the `with_params_t` class, or a (possibly cv-qualified) reference to it.

This definition may be extended in future versions, but the above types will still satisfy `ExecutionRequest`.