...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Returns a server-side identifier for the statement (unique in a per-connection basis).
std::uint32_t id() const noexcept;
Note that, once a statement is closed, the server may recycle its ID.
this->valid() == true
No-throw guarantee.