Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Returns the number of rows affected by the executed SQL statement.

std::uint64_t
affected_rows() const noexcept;

Note that this is NOT the number of matched rows. If a row is matched but not affected, it won't be accounted for here.

For operations returning more than one resultset, returns the first resultset's affected rows.

this->has_value() == true

No-throw guarantee.

Constant.