Initialize column metadata position to -1 if unset
Initialize column metadata position to -1 if unset

datastax/cpp-driver,hpcc-systems/cpp-driver,mikefero/cpp-driver,datastax/cpp-driver,mpenick/cpp-driver,hpcc-systems/cpp-driver,mikefero/cpp-driver,flightaware/cpp-driver,mpenick/cpp-driver,mpenick/cpp-driver,hpcc-systems/cpp-driver,mpenick/cpp-driver,hpcc-systems/cpp-driver,datastax/cpp-driver,datastax/cpp-driver,flightaware/cpp-driver,flightaware/cpp-driver,flightaware/cpp-driver,mikefero/cpp-driver,mikefero/cpp-driver,mikefero/cpp-driver