hi,i use these codes to store only pointer of tuple : HeapTuple *tuple; tuple = heap_getnext(pHeapScanDesc,ForwardScanDirection); while(tuple){ //[1#]here i only store the pointer of tuple in an array for later using,that means i don't retrive attribute data from this tuple ,is this ok? myArray[i++]=tuple; //then next tuple tuple = heap_getnext(pHeapScanDesc,ForwardScanDirection); } at place [1#],i only store the pointer of current tuple in an array for later using,that means i don't retrieve attribute data from this tuple ,is this ok? could these tuple pointers be invalid sometimes later if myArray still reference these tuples? i know these tuples have been read into buffers in shared memory, yet I am not sure wether these buffers be replaced or marked invalid when myArray still points to these tuples in according buffers. thanks a lot!
