Function sqlite3_bind_parameter_count

pub unsafe fn sqlite3_bind_parameter_count(stmt: *mut sqlite3_stmt) -> c_int

Used to find the number of SQL parameters in a prepared statement. SQL parameters are tokens of the form ?, ?NNN, :AAA, $AAA, or @AAA that serve as placeholders for values that are bound to the parameters at a later time.

See https://www.sqlite.org/c3ref/bind_parameter_count.html