BPLUSTREE_FREE
? BPLUSTREE_FREE : node->RightLink();
if (fCurrentNodeOffset == BPLUSTREE_FREE)
fNode->overflow_link = HOST_ENDIAN_TO_BFS_INT64((uint64)BPLUSTREE_FREE);
if (node->OverflowLink() != BPLUSTREE_FREE) {
node->overflow_link = HOST_ENDIAN_TO_BFS_INT64((uint64)BPLUSTREE_FREE);