Library Version 11.2.5.2
void swap(db_map< kdt, ddt, value_type_sub > &mp, bool b_truncate=true)
Swap content with container mp.
This function supports auto-commit.
See db_vector::swap() for details.
The container to swap content with.
http://www.cplusplus.com/reference/stl/map/swap/ db_vector::clear()
db_map