* with vacuum process
  */
 void
-findParents(GinBtree btree, GinBtreeStack *stack,
-                       BlockNumber rootBlkno)
+ginFindParents(GinBtree btree, GinBtreeStack *stack,
+                          BlockNumber rootBlkno)
 {
 
        Page            page;
                                 * rightmost page, but we don't find parent, we should use
                                 * plain search...
                                 */
-                               findParents(btree, stack, rootBlkno);
+                               ginFindParents(btree, stack, rootBlkno);
                                parent = stack->parent;
                                page = BufferGetPage(parent->buffer);
                                break;
 
        {
                int                     res;
 
-               res = compareItemPointers(eo->list + eo->number - 1, en->list);
+               res = ginCompareItemPointers(eo->list + eo->number - 1, en->list);
                Assert(res != 0);
 
                if (res > 0)
        const EntryAccumulator *eb = (const EntryAccumulator *) b;
        BuildAccumulator *accum = (BuildAccumulator *) arg;
 
-       return compareAttEntries(accum->ginstate, ea->attnum, ea->value,
-                                                        eb->attnum, eb->value);
+       return ginCompareAttEntries(accum->ginstate, ea->attnum, ea->value,
+                                                               eb->attnum, eb->value);
 }
 
 /* Allocator function for rbtree.c */
 static int
 qsortCompareItemPointers(const void *a, const void *b)
 {
-       int                     res = compareItemPointers((ItemPointer) a, (ItemPointer) b);
+       int                     res = ginCompareItemPointers((ItemPointer) a, (ItemPointer) b);
 
        Assert(res != 0);
        return res;
 
 #include "utils/rel.h"
 
 int
-compareItemPointers(ItemPointer a, ItemPointer b)
+ginCompareItemPointers(ItemPointer a, ItemPointer b)
 {
        if (GinItemPointerGetBlockNumber(a) == GinItemPointerGetBlockNumber(b))
        {
  * Caller is responsible that there is enough space at *dst.
  */
 uint32
-MergeItemPointers(ItemPointerData *dst,
-                                 ItemPointerData *a, uint32 na,
-                                 ItemPointerData *b, uint32 nb)
+ginMergeItemPointers(ItemPointerData *dst,
+                                        ItemPointerData *a, uint32 na,
+                                        ItemPointerData *b, uint32 nb)
 {
        ItemPointerData *dptr = dst;
        ItemPointerData *aptr = a,
 
        while (aptr - a < na && bptr - b < nb)
        {
-               int                     cmp = compareItemPointers(aptr, bptr);
+               int                     cmp = ginCompareItemPointers(aptr, bptr);
 
                if (cmp > 0)
                        *dptr++ = *bptr++;
        if (GinPageRightMost(page))
                return FALSE;
 
-       return (compareItemPointers(btree->items + btree->curitem, iptr) > 0) ? TRUE : FALSE;
+       return (ginCompareItemPointers(btree->items + btree->curitem, iptr) > 0) ? TRUE : FALSE;
 }
 
 /*
                else
                {
                        pitem = (PostingItem *) GinDataPageGetItem(page, mid);
-                       result = compareItemPointers(btree->items + btree->curitem, &(pitem->key));
+                       result = ginCompareItemPointers(btree->items + btree->curitem, &(pitem->key));
                }
 
                if (result == 0)
        {
                OffsetNumber mid = low + ((high - low) / 2);
 
-               result = compareItemPointers(btree->items + btree->curitem, (ItemPointer) GinDataPageGetItem(page, mid));
+               result = ginCompareItemPointers(btree->items + btree->curitem, (ItemPointer) GinDataPageGetItem(page, mid));
 
                if (result == 0)
                {
  * Deletes posting item from non-leaf page
  */
 void
-PageDeletePostingItem(Page page, OffsetNumber offset)
+GinPageDeletePostingItem(Page page, OffsetNumber offset)
 {
        OffsetNumber maxoff = GinPageGetOpaque(page)->maxoff;
 
  * Also called from ginxlog, should not use btree
  */
 void
-dataFillRoot(GinBtree btree, Buffer root, Buffer lbuf, Buffer rbuf)
+ginDataFillRoot(GinBtree btree, Buffer root, Buffer lbuf, Buffer rbuf)
 {
        Page            page = BufferGetPage(root),
                                lpage = BufferGetPage(lbuf),
 }
 
 void
-prepareDataScan(GinBtree btree, Relation index)
+ginPrepareDataScan(GinBtree btree, Relation index)
 {
        memset(btree, 0, sizeof(GinBtreeData));
 
        btree->isEnoughSpace = dataIsEnoughSpace;
        btree->placeToPage = dataPlaceToPage;
        btree->splitPage = dataSplitPage;
-       btree->fillRoot = dataFillRoot;
+       btree->fillRoot = ginDataFillRoot;
 
        btree->isData = TRUE;
        btree->searchMode = FALSE;
 }
 
 GinPostingTreeScan *
-prepareScanPostingTree(Relation index, BlockNumber rootBlkno, bool searchMode)
+ginPrepareScanPostingTree(Relation index, BlockNumber rootBlkno, bool searchMode)
 {
        GinPostingTreeScan *gdi = (GinPostingTreeScan *) palloc0(sizeof(GinPostingTreeScan));
 
-       prepareDataScan(&gdi->btree, index);
+       ginPrepareDataScan(&gdi->btree, index);
 
        gdi->btree.searchMode = searchMode;
        gdi->btree.fullScan = searchMode;
 }
 
 Buffer
-scanBeginPostingTree(GinPostingTreeScan *gdi)
+ginScanBeginPostingTree(GinPostingTreeScan *gdi)
 {
        gdi->stack = ginFindLeafPage(&gdi->btree, gdi->stack);
        return gdi->stack->buffer;
 
 
        itup = getRightMostTuple(page);
 
-       if (compareAttEntries(btree->ginstate,
-                                                 btree->entryAttnum, btree->entryValue,
-                                                 gintuple_get_attrnum(btree->ginstate, itup),
-                                                 gin_index_getattr(btree->ginstate, itup)) > 0)
+       if (ginCompareAttEntries(btree->ginstate,
+                                                        btree->entryAttnum, btree->entryValue,
+                                                        gintuple_get_attrnum(btree->ginstate, itup),
+                                                        gin_index_getattr(btree->ginstate, itup)) > 0)
                return TRUE;
 
        return FALSE;
                else
                {
                        itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, mid));
-                       result = compareAttEntries(btree->ginstate,
-                                                                          btree->entryAttnum, btree->entryValue,
+                       result = ginCompareAttEntries(btree->ginstate,
+                                                                                 btree->entryAttnum,
+                                                                                 btree->entryValue,
                                                                 gintuple_get_attrnum(btree->ginstate, itup),
                                                                   gin_index_getattr(btree->ginstate, itup));
                }
                int                     result;
 
                itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, mid));
-               result = compareAttEntries(btree->ginstate,
-                                                                  btree->entryAttnum, btree->entryValue,
+               result = ginCompareAttEntries(btree->ginstate,
+                                                                         btree->entryAttnum,
+                                                                         btree->entryValue,
                                                                 gintuple_get_attrnum(btree->ginstate, itup),
                                                                   gin_index_getattr(btree->ginstate, itup));
                if (result == 0)
  * Also called from ginxlog, should not use btree
  */
 void
-entryFillRoot(GinBtree btree, Buffer root, Buffer lbuf, Buffer rbuf)
+ginEntryFillRoot(GinBtree btree, Buffer root, Buffer lbuf, Buffer rbuf)
 {
        Page            page;
        IndexTuple      itup;
 }
 
 void
-prepareEntryScan(GinBtree btree, Relation index, OffsetNumber attnum, Datum value, GinState *ginstate)
+ginPrepareEntryScan(GinBtree btree, Relation index, OffsetNumber attnum, Datum value, GinState *ginstate)
 {
        memset(btree, 0, sizeof(GinBtreeData));
 
        btree->isEnoughSpace = entryIsEnoughSpace;
        btree->placeToPage = entryPlaceToPage;
        btree->splitPage = entrySplitPage;
-       btree->fillRoot = entryFillRoot;
+       btree->fillRoot = ginEntryFillRoot;
 
        btree->isData = FALSE;
        btree->searchMode = FALSE;
 
        int32           i,
                                nentries;
 
-       entries = extractEntriesSU(ginstate, attnum, value, &nentries);
+       entries = ginExtractEntriesSU(ginstate, attnum, value, &nentries);
 
        if (nentries == 0)
                /* nothing to insert */
 
         */
        for (*off = FirstOffsetNumber; *off <= maxoff; (*off)++)
        {
-               res = compareItemPointers(item, (ItemPointer) GinDataPageGetItem(page, *off));
+               res = ginCompareItemPointers(item, (ItemPointer) GinDataPageGetItem(page, *off));
 
                if (res <= 0)
                        return true;
        Page            page;
        BlockNumber blkno;
 
-       gdi = prepareScanPostingTree(index, rootPostingTree, TRUE);
+       gdi = ginPrepareScanPostingTree(index, rootPostingTree, TRUE);
 
-       buffer = scanBeginPostingTree(gdi);
+       buffer = ginScanBeginPostingTree(gdi);
        IncrBufferRefCount(buffer); /* prevent unpin in freeGinBtreeStack */
 
        freeGinBtreeStack(gdi->stack);
                                if (gintuple_get_attrnum(btree->ginstate, itup) != scanEntry->attnum)
                                        elog(ERROR, "lost saved point in index");       /* must not happen !!! */
 
-                               if (compareEntries(btree->ginstate, scanEntry->attnum, newDatum, savedDatum) == 0)
+                               if (ginCompareEntries(btree->ginstate, scanEntry->attnum,
+                                                                         newDatum, savedDatum) == 0)
                                {
                                        /* Found!  */
                                        if (btree->ginstate->origTupdesc->attrs[scanEntry->attnum - 1]->attbyval == false)
         * posting list in memory
         */
 
-       prepareEntryScan(&btreeEntry, index, entry->attnum, entry->entry, ginstate);
+       ginPrepareEntryScan(&btreeEntry, index, entry->attnum, entry->entry, ginstate);
        btreeEntry.searchMode = TRUE;
        stackEntry = ginFindLeafPage(&btreeEntry, NULL);
        page = BufferGetPage(stackEntry->buffer);
                         */
                        LockBuffer(stackEntry->buffer, GIN_UNLOCK);
                        needUnlock = FALSE;
-                       gdi = prepareScanPostingTree(index, rootPostingTree, TRUE);
+                       gdi = ginPrepareScanPostingTree(index, rootPostingTree, TRUE);
 
-                       entry->buffer = scanBeginPostingTree(gdi);
+                       entry->buffer = ginScanBeginPostingTree(gdi);
 
                        /*
                         * We keep buffer pinned because we need to prevent deletion of
                                LockBuffer(entry->buffer, GIN_UNLOCK);
 
                                if (!ItemPointerIsValid(&entry->curItem) ||
-                                       compareItemPointers(&entry->curItem,
-                                                                               entry->list + entry->offset - 1) == 0)
+                                       ginCompareItemPointers(&entry->curItem,
+                                                                                  entry->list + entry->offset - 1) == 0)
                                {
                                        /*
                                         * First pages are deleted or empty, or we found exact
                        entry = key->scanEntry + i;
 
                        while (entry->isFinished == FALSE &&
-                                  compareItemPointers(&entry->curItem, &myAdvancePast) <= 0)
+                                  ginCompareItemPointers(&entry->curItem, &myAdvancePast) <= 0)
                                entryGetItem(index, entry);
 
                        if (entry->isFinished == FALSE &&
-                               compareItemPointers(&entry->curItem, &key->curItem) < 0)
+                               ginCompareItemPointers(&entry->curItem, &key->curItem) < 0)
                                key->curItem = entry->curItem;
                }
 
                {
                        entry = key->scanEntry + i;
                        if (entry->isFinished == FALSE &&
-                               compareItemPointers(&entry->curItem, &curPageLossy) == 0)
+                               ginCompareItemPointers(&entry->curItem, &curPageLossy) == 0)
                        {
                                if (haveLossyEntry)
                                {
                {
                        entry = key->scanEntry + i;
                        if (entry->isFinished == FALSE &&
-                               compareItemPointers(&entry->curItem, &key->curItem) == 0)
+                               ginCompareItemPointers(&entry->curItem, &key->curItem) == 0)
                                key->entryRes[i] = TRUE;
                        else
                                key->entryRes[i] = FALSE;
                                                        datum[StopMiddle - 1] = gin_index_getattr(&so->ginstate, itup);
                                                        datumExtracted[StopMiddle - 1] = true;
                                                }
-                                               res = compareEntries(&so->ginstate,
-                                                                                        entry->attnum,
-                                                                                        entry->entry,
-                                                                                        datum[StopMiddle - 1]);
+                                               res = ginCompareEntries(&so->ginstate,
+                                                                                               entry->attnum,
+                                                                                               entry->entry,
+                                                                                               datum[StopMiddle - 1]);
 
                                                if (res == 0)
                                                {
                        GinScanKey      key = so->keys + i;
 
                        while (key->isFinished == FALSE &&
-                                  compareItemPointers(&key->curItem, &myAdvancePast) <= 0)
+                                  ginCompareItemPointers(&key->curItem, &myAdvancePast) <= 0)
                                keyGetItem(scan->indexRelation, &so->ginstate, so->tempCtx,
                                                   key, &myAdvancePast);
 
                        if (key->isFinished)
                                        return FALSE;           /* finished one of keys */
 
-                       if (compareItemPointers(&key->curItem, item) < 0)
+                       if (ginCompareItemPointers(&key->curItem, item) < 0)
                                *item = key->curItem;
                }
 
                {
                        GinScanKey      key = so->keys + i;
 
-                       if (compareItemPointers(item, &key->curItem) == 0)
+                       if (ginCompareItemPointers(item, &key->curItem) == 0)
                                continue;
                        if (ItemPointerIsLossyPage(&key->curItem) &&
                                GinItemPointerGetBlockNumber(&key->curItem) ==
        bool            recheck;
 
        if (GinIsNewKey(scan))
-               newScanKey(scan);
+               ginNewScanKey(scan);
 
        if (GinIsVoidRes(scan))
                PG_RETURN_INT64(0);
 
                /* good, small enough */
                uint32          newnitem;
 
-               newnitem = MergeItemPointers(GinGetPosting(res),
-                                                                        GinGetPosting(old), GinGetNPosting(old),
-                                                                        items, nitem);
+               newnitem = ginMergeItemPointers(GinGetPosting(res),
+                                                                               GinGetPosting(old),
+                                                                               GinGetNPosting(old),
+                                                                               items, nitem);
                /* merge might have eliminated some duplicate items */
                GinShortenTuple(res, newnitem);
        }
                postingRoot = createPostingTree(index, GinGetPosting(old), GinGetNPosting(old));
                GinSetPostingTree(res, postingRoot);
 
-               gdi = prepareScanPostingTree(index, postingRoot, FALSE);
+               gdi = ginPrepareScanPostingTree(index, postingRoot, FALSE);
                gdi->btree.isBuild = (buildStats != NULL);
 
                ginInsertItemPointer(gdi, items, nitem, buildStats);
        if (buildStats)
                buildStats->nEntries++;
 
-       prepareEntryScan(&btree, index, attnum, value, ginstate);
+       ginPrepareEntryScan(&btree, index, attnum, value, ginstate);
 
        stack = ginFindLeafPage(&btree, NULL);
        page = BufferGetPage(stack->buffer);
                        freeGinBtreeStack(stack);
 
                        /* insert into posting tree */
-                       gdi = prepareScanPostingTree(index, rootPostingTree, FALSE);
+                       gdi = ginPrepareScanPostingTree(index, rootPostingTree, FALSE);
                        gdi->btree.isBuild = (buildStats != NULL);
                        ginInsertItemPointer(gdi, items, nitem, buildStats);
                        pfree(gdi);
        MemoryContext oldCtx;
 
        oldCtx = MemoryContextSwitchTo(buildstate->funcCtx);
-       entries = extractEntriesSU(buildstate->accum.ginstate, attnum, value, &nentries);
+       entries = ginExtractEntriesSU(buildstate->accum.ginstate, attnum, value, &nentries);
        MemoryContextSwitchTo(oldCtx);
 
        if (nentries == 0)
        int32           i,
                                nentries;
 
-       entries = extractEntriesSU(ginstate, attnum, value, &nentries);
+       entries = ginExtractEntriesSU(ginstate, attnum, value, &nentries);
 
        if (nentries == 0)
                /* nothing to insert */
 
                /* link to the equals entry in current scan key */
                key->scanEntry[i].master = NULL;
                for (j = 0; j < i; j++)
-                       if (compareEntries(ginstate, attnum, entryValues[i], entryValues[j]) == 0 &&
+                       if (ginCompareEntries(ginstate, attnum,
+                                                                 entryValues[i], entryValues[j]) == 0 &&
                                key->scanEntry[i].isPartialMatch == key->scanEntry[j].isPartialMatch &&
                                key->scanEntry[i].strategy == key->scanEntry[j].strategy)
                        {
 }
 
 void
-newScanKey(IndexScanDesc scan)
+ginNewScanKey(IndexScanDesc scan)
 {
        ScanKey         scankey = scan->keyData;
        GinScanOpaque so = (GinScanOpaque) scan->opaque;
 
 }
 
 int
-compareEntries(GinState *ginstate, OffsetNumber attnum, Datum a, Datum b)
+ginCompareEntries(GinState *ginstate, OffsetNumber attnum, Datum a, Datum b)
 {
-       return DatumGetInt32(
-                                                FunctionCall2(
-                                                                          &ginstate->compareFn[attnum - 1],
-                                                                          a, b
-                                                                          )
-               );
+       return DatumGetInt32(FunctionCall2(&ginstate->compareFn[attnum - 1],
+                                                                          a, b));
 }
 
 int
-compareAttEntries(GinState *ginstate, OffsetNumber attnum_a, Datum a,
-                                 OffsetNumber attnum_b, Datum b)
+ginCompareAttEntries(GinState *ginstate, OffsetNumber attnum_a, Datum a,
+                                        OffsetNumber attnum_b, Datum b)
 {
        if (attnum_a == attnum_b)
-               return compareEntries(ginstate, attnum_a, a, b);
+               return ginCompareEntries(ginstate, attnum_a, a, b);
 
        return (attnum_a < attnum_b) ? -1 : 1;
 }
 }
 
 Datum *
-extractEntriesS(GinState *ginstate, OffsetNumber attnum, Datum value, int32 *nentries,
+ginExtractEntriesS(GinState *ginstate, OffsetNumber attnum, Datum value, int32 *nentries,
                                bool *needUnique)
 {
        Datum      *entries;
 
 
 Datum *
-extractEntriesSU(GinState *ginstate, OffsetNumber attnum, Datum value, int32 *nentries)
+ginExtractEntriesSU(GinState *ginstate, OffsetNumber attnum, Datum value, int32 *nentries)
 {
        bool            needUnique;
-       Datum      *entries = extractEntriesS(ginstate, attnum, value, nentries,
-                                                                                 &needUnique);
+       Datum      *entries = ginExtractEntriesS(ginstate, attnum, value, nentries,
+                                                                                        &needUnique);
 
        if (needUnique)
        {
 
                while (ptr - entries < *nentries)
                {
-                       if (compareEntries(ginstate, attnum, *ptr, *res) != 0)
+                       if (ginCompareEntries(ginstate, attnum, *ptr, *res) != 0)
                                *(++res) = *ptr++;
                        else
                                ptr++;
 
                Assert(PostingItemGetBlockNumber(tod) == deleteBlkno);
        } while (0);
 #endif
-       PageDeletePostingItem(parentPage, myoff);
+       GinPageDeletePostingItem(parentPage, myoff);
 
        page = BufferGetPage(dBuffer);
 
 
                if (data->isData)
                {
                        Assert(data->rootBlkno != GIN_ROOT_BLKNO);
-                       dataFillRoot(NULL, rootBuf, lbuffer, rbuffer);
+                       ginDataFillRoot(NULL, rootBuf, lbuffer, rbuffer);
                }
                else
                {
                        Assert(data->rootBlkno == GIN_ROOT_BLKNO);
-                       entryFillRoot(NULL, rootBuf, lbuffer, rbuffer);
+                       ginEntryFillRoot(NULL, rootBuf, lbuffer, rbuffer);
                }
 
                PageSetLSN(rootPage, lsn);
                        {
                                Assert(GinPageIsData(page));
                                Assert(!GinPageIsLeaf(page));
-                               PageDeletePostingItem(page, data->parentOffset);
+                               GinPageDeletePostingItem(page, data->parentOffset);
                                PageSetLSN(page, lsn);
                                PageSetTLI(page, ThisTimeLineID);
                                MarkBufferDirty(buffer);
 
        if (split->rootBlkno == GIN_ROOT_BLKNO)
        {
-               prepareEntryScan(&btree, reln, InvalidOffsetNumber, (Datum) 0, NULL);
+               ginPrepareEntryScan(&btree, reln, InvalidOffsetNumber, (Datum) 0, NULL);
                btree.entry = ginPageGetLinkItup(buffer);
        }
        else
        {
                Page            page = BufferGetPage(buffer);
 
-               prepareDataScan(&btree, reln);
+               ginPrepareDataScan(&btree, reln);
 
                PostingItemSetBlockNumber(&(btree.pitem), split->leftBlkno);
                if (GinPageIsLeaf(page))
        stack.off = InvalidOffsetNumber;
        stack.parent = NULL;
 
-       findParents(&btree, &stack, split->rootBlkno);
+       ginFindParents(&btree, &stack, split->rootBlkno);
        ginInsertValue(&btree, stack.parent, NULL);
 
        FreeFakeRelcacheEntry(reln);
 
 extern void GinInitBuffer(Buffer b, uint32 f);
 extern void GinInitPage(Page page, uint32 f, Size pageSize);
 extern void GinInitMetabuffer(Buffer b);
-extern int     compareEntries(GinState *ginstate, OffsetNumber attnum, Datum a, Datum b);
-extern int compareAttEntries(GinState *ginstate, OffsetNumber attnum_a, Datum a,
+extern int     ginCompareEntries(GinState *ginstate, OffsetNumber attnum, Datum a, Datum b);
+extern int     ginCompareAttEntries(GinState *ginstate, OffsetNumber attnum_a, Datum a,
                                  OffsetNumber attnum_b, Datum b);
-extern Datum *extractEntriesS(GinState *ginstate, OffsetNumber attnum, Datum value,
+extern Datum *ginExtractEntriesS(GinState *ginstate, OffsetNumber attnum, Datum value,
                                int32 *nentries, bool *needUnique);
-extern Datum *extractEntriesSU(GinState *ginstate, OffsetNumber attnum, Datum value, int32 *nentries);
+extern Datum *ginExtractEntriesSU(GinState *ginstate, OffsetNumber attnum, Datum value, int32 *nentries);
 
 extern Datum gin_index_getattr(GinState *ginstate, IndexTuple tuple);
 extern OffsetNumber gintuple_get_attrnum(GinState *ginstate, IndexTuple tuple);
 extern void freeGinBtreeStack(GinBtreeStack *stack);
 extern void ginInsertValue(GinBtree btree, GinBtreeStack *stack,
                                                   GinStatsData *buildStats);
-extern void findParents(GinBtree btree, GinBtreeStack *stack, BlockNumber rootBlkno);
+extern void ginFindParents(GinBtree btree, GinBtreeStack *stack, BlockNumber rootBlkno);
 
 /* ginentrypage.c */
 extern IndexTuple GinFormTuple(Relation index, GinState *ginstate,
                         OffsetNumber attnum, Datum key,
                         ItemPointerData *ipd, uint32 nipd, bool errorTooBig);
 extern void GinShortenTuple(IndexTuple itup, uint32 nipd);
-extern void prepareEntryScan(GinBtree btree, Relation index, OffsetNumber attnum,
+extern void ginPrepareEntryScan(GinBtree btree, Relation index, OffsetNumber attnum,
                                 Datum value, GinState *ginstate);
-extern void entryFillRoot(GinBtree btree, Buffer root, Buffer lbuf, Buffer rbuf);
+extern void ginEntryFillRoot(GinBtree btree, Buffer root, Buffer lbuf, Buffer rbuf);
 extern IndexTuple ginPageGetLinkItup(Buffer buf);
 
 /* gindatapage.c */
-extern int     compareItemPointers(ItemPointer a, ItemPointer b);
-extern uint32 MergeItemPointers(ItemPointerData *dst,
+extern int     ginCompareItemPointers(ItemPointer a, ItemPointer b);
+extern uint32 ginMergeItemPointers(ItemPointerData *dst,
                                  ItemPointerData *a, uint32 na,
                                  ItemPointerData *b, uint32 nb);
 
 extern void GinDataPageAddItem(Page page, void *data, OffsetNumber offset);
-extern void PageDeletePostingItem(Page page, OffsetNumber offset);
+extern void GinPageDeletePostingItem(Page page, OffsetNumber offset);
 
 typedef struct
 {
        GinBtreeStack *stack;
 } GinPostingTreeScan;
 
-extern GinPostingTreeScan *prepareScanPostingTree(Relation index,
+extern GinPostingTreeScan *ginPrepareScanPostingTree(Relation index,
                                           BlockNumber rootBlkno, bool searchMode);
 extern void ginInsertItemPointer(GinPostingTreeScan *gdi,
                                                                 ItemPointerData *items, uint32 nitem,
                                                                 GinStatsData *buildStats);
-extern Buffer scanBeginPostingTree(GinPostingTreeScan *gdi);
-extern void dataFillRoot(GinBtree btree, Buffer root, Buffer lbuf, Buffer rbuf);
-extern void prepareDataScan(GinBtree btree, Relation index);
+extern Buffer ginScanBeginPostingTree(GinPostingTreeScan *gdi);
+extern void ginDataFillRoot(GinBtree btree, Buffer root, Buffer lbuf, Buffer rbuf);
+extern void ginPrepareDataScan(GinBtree btree, Relation index);
 
 /* ginscan.c */
 
 extern Datum ginrescan(PG_FUNCTION_ARGS);
 extern Datum ginmarkpos(PG_FUNCTION_ARGS);
 extern Datum ginrestrpos(PG_FUNCTION_ARGS);
-extern void newScanKey(IndexScanDesc scan);
+extern void ginNewScanKey(IndexScanDesc scan);
 
 /* ginget.c */
 extern PGDLLIMPORT int GinFuzzySearchLimit;