/*
* Fills new root by rightest values from child.
* Also called from ginxlog, should not use btree
*/
void
ginEntryFillRoot(GinBtree btree, Page root,
BlockNumber lblkno, Page lpage,
BlockNumber rblkno, Page rpage)
{
IndexTuple itup;
itup = GinFormInteriorTuple(getRightMostTuple(lpage), lpage, lblkno);
if (PageAddItem(root, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false, false) == InvalidOffsetNumber)
elog(ERROR, "failed to add item to index root page");
pfree(itup);
itup = GinFormInteriorTuple(getRightMostTuple(rpage), rpage, rblkno);
if (PageAddItem(root, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, false, false) == InvalidOffsetNumber)
elog(ERROR, "failed to add item to index root page");
pfree(itup);
}
/*
* return newly allocated rightmost tuple
*/
IndexTuple
rumPageGetLinkItup(RumBtree btree, Buffer buf, Page page)
{
IndexTuple itup,
nitup;
itup = getRightMostTuple(page);
nitup = RumFormInteriorTuple(btree, itup, page, BufferGetBlockNumber(buf));
return nitup;
}
/*
* return newly allocate rightmost tuple
*/
IndexTuple
ginPageGetLinkItup(Buffer buf)
{
IndexTuple itup,
nitup;
Page page = BufferGetPage(buf);
itup = getRightMostTuple(page);
nitup = copyIndexTuple(itup, page);
ItemPointerSet(&nitup->t_tid, BufferGetBlockNumber(buf), InvalidOffsetNumber);
return nitup;
}
/*
* Construct insertion payload for inserting the downlink for given buffer.
*/
static void *
entryPrepareDownlink(GinBtree btree, Buffer lbuf)
{
GinBtreeEntryInsertData *insertData;
Page lpage = BufferGetPage(lbuf);
BlockNumber lblkno = BufferGetBlockNumber(lbuf);
IndexTuple itup;
itup = getRightMostTuple(lpage);
insertData = palloc(sizeof(GinBtreeEntryInsertData));
insertData->entry = GinFormInteriorTuple(itup, lpage, lblkno);
insertData->isDelete = false;
return insertData;
}
static bool
entryIsMoveRight(GinBtree btree, Page page)
{
IndexTuple itup;
if (GinPageRightMost(page))
return FALSE;
itup = getRightMostTuple(page);
if (compareAttEntries(btree->ginstate,
btree->entryAttnum, btree->entryValue,
gintuple_get_attrnum(btree->ginstate, itup),
gin_index_getattr(btree->ginstate, itup)) > 0)
return TRUE;
return FALSE;
}
static bool
entryIsMoveRight(GinBtree btree, Page page)
{
IndexTuple itup;
OffsetNumber attnum;
Datum key;
GinNullCategory category;
if (GinPageRightMost(page))
return FALSE;
itup = getRightMostTuple(page);
attnum = gintuple_get_attrnum(btree->ginstate, itup);
key = gintuple_get_key(btree->ginstate, itup, &category);
if (ginCompareAttEntries(btree->ginstate,
btree->entryAttnum, btree->entryKey, btree->entryCategory,
attnum, key, category) > 0)
return TRUE;
return FALSE;
}
static bool
entryIsMoveRight(RumBtree btree, Page page)
{
IndexTuple itup;
OffsetNumber attnum;
Datum key;
RumNullCategory category;
if (RumPageRightMost(page))
return false;
itup = getRightMostTuple(page);
attnum = rumtuple_get_attrnum(btree->rumstate, itup);
key = rumtuple_get_key(btree->rumstate, itup, &category);
if (rumCompareAttEntries(btree->rumstate,
btree->entryAttnum, btree->entryKey, btree->entryCategory,
attnum, key, category) > 0)
return true;
return false;
}