Breakpoint1, tuplesort_begin_heap (tupDesc=0x208fa40, nkeys=2, attNums=0x2081858, sortOperators=0x2081878, sortCollations=0x2081898, nullsFirstFlags=0x20818b8, workMem=4096, coordinate=0x0, randomAccess=false) at tuplesort.c:812812Tuplesortstate *state =tuplesort_begin_common(workMem, co...