use oid,int bats, use size_t for piece boundaries, prepare for full support of select and uselect
use oid,int bats, use size_t for piece boundaries, prepare for full support of select and uselect

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb