/*
* Build a fresh leaf tuple, either posting-list or posting-tree format
* depending on whether the given items list will fit.
* items[] must be in sorted order with no duplicates.
*
* This is basically the same logic as in addItemPointersToLeafTuple,
* but working from slightly different input.
*/
static IndexTuple
buildFreshLeafTuple(GinState *ginstate,
OffsetNumber attnum, Datum key, GinNullCategory category,
ItemPointerData *items, uint32 nitem,
GinStatsData *buildStats)
{
IndexTuple res;
/* try to build a posting list tuple with all the items */
res = GinFormTuple(ginstate, attnum, key, category,
items, nitem, false);
if (!res)
{
/* posting list would be too big, build posting tree */
BlockNumber postingRoot;
/*
* Build posting-tree-only result tuple. We do this first so as to
* fail quickly if the key is too big.
*/
res = GinFormTuple(ginstate, attnum, key, category, NULL, 0, true);
/*
* Initialize a new posting tree with the TIDs.
*/
postingRoot = createPostingTree(ginstate->index, items, nitem,
buildStats);
/* And save the root link in the result tuple */
GinSetPostingTree(res, postingRoot);
}
return res;
}
/*
* Adds array of item pointers to tuple's posting list or
* creates posting tree and tuple pointed to tree in a case
* of not enough space. Max size of tuple is defined in
* GinFormTuple().
*/
static IndexTuple
addItemPointersToTuple(Relation index, GinState *ginstate,
GinBtreeStack *stack, IndexTuple old,
ItemPointerData *items, uint32 nitem,
GinStatsData *buildStats)
{
Datum key = gin_index_getattr(ginstate, old);
OffsetNumber attnum = gintuple_get_attrnum(ginstate, old);
IndexTuple res = GinFormTuple(index, ginstate, attnum, key,
NULL, nitem + GinGetNPosting(old),
false);
if (res)
{
/* good, small enough */
uint32 newnitem;
newnitem = ginMergeItemPointers(GinGetPosting(res),
GinGetPosting(old),
GinGetNPosting(old),
items, nitem);
/* merge might have eliminated some duplicate items */
GinShortenTuple(res, newnitem);
}
else
{
BlockNumber postingRoot;
GinPostingTreeScan *gdi;
/* posting list becomes big, so we need to make posting's tree */
res = GinFormTuple(index, ginstate, attnum, key, NULL, 0, true);
postingRoot = createPostingTree(index, GinGetPosting(old), GinGetNPosting(old));
GinSetPostingTree(res, postingRoot);
gdi = ginPrepareScanPostingTree(index, postingRoot, FALSE);
gdi->btree.isBuild = (buildStats != NULL);
ginInsertItemPointer(gdi, items, nitem, buildStats);
pfree(gdi);
/* During index build, count the newly-added data page */
if (buildStats)
buildStats->nDataPages++;
}
return res;
}
/*
* Adds array of item pointers to tuple's posting list or
* creates posting tree and tuple pointed to tree in a case
* of not enough space. Max size of tuple is defined in
* GinFormTuple().
*/
static IndexTuple
addItemPointersToTuple(Relation index, GinState *ginstate, GinBtreeStack *stack,
IndexTuple old, ItemPointerData *items, uint32 nitem, bool isBuild)
{
bool isnull;
Datum key = index_getattr(old, FirstOffsetNumber, ginstate->tupdesc, &isnull);
IndexTuple res = GinFormTuple(ginstate, key, NULL, nitem + GinGetNPosting(old));
if (res)
{
/* good, small enough */
MergeItemPointers(GinGetPosting(res),
GinGetPosting(old), GinGetNPosting(old),
items, nitem
);
GinSetNPosting(res, nitem + GinGetNPosting(old));
}
else
{
BlockNumber postingRoot;
GinPostingTreeScan *gdi;
/* posting list becomes big, so we need to make posting's tree */
res = GinFormTuple(ginstate, key, NULL, 0);
postingRoot = createPostingTree(index, GinGetPosting(old), GinGetNPosting(old));
GinSetPostingTree(res, postingRoot);
gdi = prepareScanPostingTree(index, postingRoot, FALSE);
gdi->btree.isBuild = isBuild;
insertItemPointer(gdi, items, nitem);
pfree(gdi);
}
return res;
}
/*
* Adds array of item pointers to tuple's posting list, or
* creates posting tree and tuple pointing to tree in case
* of not enough space. Max size of tuple is defined in
* GinFormTuple(). Returns a new, modified index tuple.
* items[] must be in sorted order with no duplicates.
*/
static IndexTuple
addItemPointersToLeafTuple(GinState *ginstate,
IndexTuple old,
ItemPointerData *items, uint32 nitem,
GinStatsData *buildStats, Buffer buffer)
{
OffsetNumber attnum;
Datum key;
GinNullCategory category;
IndexTuple res;
ItemPointerData *newItems,
*oldItems;
int oldNPosting,
newNPosting;
GinPostingList *compressedList;
Assert(!GinIsPostingTree(old));
attnum = gintuple_get_attrnum(ginstate, old);
key = gintuple_get_key(ginstate, old, &category);
/* merge the old and new posting lists */
oldItems = ginReadTuple(ginstate, attnum, old, &oldNPosting);
newItems = ginMergeItemPointers(items, nitem,
oldItems, oldNPosting,
&newNPosting);
/* Compress the posting list, and try to a build tuple with room for it */
res = NULL;
compressedList = ginCompressPostingList(newItems, newNPosting, GinMaxItemSize,
NULL);
pfree(newItems);
if (compressedList)
{
res = GinFormTuple(ginstate, attnum, key, category,
(char *) compressedList,
SizeOfGinPostingList(compressedList),
newNPosting,
false);
pfree(compressedList);
}
if (!res)
{
/* posting list would be too big, convert to posting tree */
BlockNumber postingRoot;
/*
* Initialize posting tree with the old tuple's posting list. It's
* surely small enough to fit on one posting-tree page, and should
* already be in order with no duplicates.
*/
postingRoot = createPostingTree(ginstate->index,
oldItems,
oldNPosting,
buildStats,
buffer);
/* Now insert the TIDs-to-be-added into the posting tree */
ginInsertItemPointers(ginstate->index, postingRoot,
items, nitem,
buildStats);
/* And build a new posting-tree-only result tuple */
res = GinFormTuple(ginstate, attnum, key, category, NULL, 0, 0, true);
GinSetPostingTree(res, postingRoot);
}
pfree(oldItems);
return res;
}
/*
* Adds array of item pointers to tuple's posting list, or
* creates posting tree and tuple pointing to tree in case
* of not enough space. Max size of tuple is defined in
* GinFormTuple(). Returns a new, modified index tuple.
* items[] must be in sorted order with no duplicates.
*/
static IndexTuple
addItemPointersToLeafTuple(GinState *ginstate,
IndexTuple old,
ItemPointerData *items, uint32 nitem,
GinStatsData *buildStats)
{
OffsetNumber attnum;
Datum key;
GinNullCategory category;
IndexTuple res;
Assert(!GinIsPostingTree(old));
attnum = gintuple_get_attrnum(ginstate, old);
key = gintuple_get_key(ginstate, old, &category);
/* try to build tuple with room for all the items */
res = GinFormTuple(ginstate, attnum, key, category,
NULL, nitem + GinGetNPosting(old),
false);
if (res)
{
/* good, small enough */
uint32 newnitem;
/* fill in the posting list with union of old and new TIDs */
newnitem = ginMergeItemPointers(GinGetPosting(res),
GinGetPosting(old),
GinGetNPosting(old),
items, nitem);
/* merge might have eliminated some duplicate items */
GinShortenTuple(res, newnitem);
}
else
{
/* posting list would be too big, convert to posting tree */
BlockNumber postingRoot;
/*
* Initialize posting tree with the old tuple's posting list. It's
* surely small enough to fit on one posting-tree page, and should
* already be in order with no duplicates.
*/
postingRoot = createPostingTree(ginstate->index,
GinGetPosting(old),
GinGetNPosting(old),
buildStats);
/* Now insert the TIDs-to-be-added into the posting tree */
ginInsertItemPointers(ginstate->index, postingRoot,
items, nitem,
buildStats);
/* And build a new posting-tree-only result tuple */
res = GinFormTuple(ginstate, attnum, key, category, NULL, 0, true);
GinSetPostingTree(res, postingRoot);
}
return res;
}
