#elif PG_VERSION_NUM >= 90100
gdi = ginPrepareScanPostingTree(st->index, rootblkno, TRUE);
entrybuffer = ginScanBeginPostingTree(gdi);
page = BufferGetPage(entrybuffer);
predictNumber = gdi->stack->predictNumber;
#elif PG_VERSION_NUM >= 90100
gdi = ginPrepareScanPostingTree(st->index, rootblkno, TRUE);
entrybuffer = ginScanBeginPostingTree(gdi);
page = BufferGetPage(entrybuffer);
predictNumber = gdi->stack->predictNumber;