/* * Insert value (stored in GinBtree) to tree described by stack * * During an index build, buildStats is non-null and the counters * it contains should be incremented as needed. * * NB: the passed-in stack is freed, as though by freeGinBtreeStack. */ void ginInsertValue(GinBtree btree, GinBtreeStack *stack, GinStatsData *buildStats) { GinBtreeStack *parent = stack; BlockNumber rootBlkno = InvalidBuffer; Page page, rpage, lpage; /* remember root BlockNumber */ while (parent) { rootBlkno = parent->blkno; parent = parent->parent; } while (stack) { XLogRecData *rdata; BlockNumber savedRightLink; page = BufferGetPage(stack->buffer); savedRightLink = GinPageGetOpaque(page)->rightlink; if (btree->isEnoughSpace(btree, stack->buffer, stack->off)) { START_CRIT_SECTION(); btree->placeToPage(btree, stack->buffer, stack->off, &rdata); MarkBufferDirty(stack->buffer); if (RelationNeedsWAL(btree->index)) { XLogRecPtr recptr; recptr = XLogInsert(RM_GIN_ID, XLOG_GIN_INSERT, rdata); PageSetLSN(page, recptr); PageSetTLI(page, ThisTimeLineID); } LockBuffer(stack->buffer, GIN_UNLOCK); END_CRIT_SECTION(); freeGinBtreeStack(stack); return; } else { Buffer rbuffer = GinNewBuffer(btree->index); Page newlpage; /* * newlpage is a pointer to memory page, it doesn't associate with * buffer, stack->buffer should be untouched */ newlpage = btree->splitPage(btree, stack->buffer, rbuffer, stack->off, &rdata); ((ginxlogSplit *) (rdata->data))->rootBlkno = rootBlkno; /* During index build, count the newly-split page */ if (buildStats) { if (btree->isData) buildStats->nDataPages++; else buildStats->nEntryPages++; } parent = stack->parent; if (parent == NULL) { /* * split root, so we need to allocate new left page and place * pointer on root to left and right page */ Buffer lbuffer = GinNewBuffer(btree->index); ((ginxlogSplit *) (rdata->data))->isRootSplit = TRUE; ((ginxlogSplit *) (rdata->data))->rrlink = InvalidBlockNumber; page = BufferGetPage(stack->buffer); lpage = BufferGetPage(lbuffer); rpage = BufferGetPage(rbuffer); GinPageGetOpaque(rpage)->rightlink = InvalidBlockNumber; GinPageGetOpaque(newlpage)->rightlink = BufferGetBlockNumber(rbuffer); ((ginxlogSplit *) (rdata->data))->lblkno = BufferGetBlockNumber(lbuffer); START_CRIT_SECTION(); GinInitBuffer(stack->buffer, GinPageGetOpaque(newlpage)->flags & ~GIN_LEAF); PageRestoreTempPage(newlpage, lpage); btree->fillRoot(btree, stack->buffer, lbuffer, rbuffer); MarkBufferDirty(rbuffer); MarkBufferDirty(lbuffer); MarkBufferDirty(stack->buffer); if (RelationNeedsWAL(btree->index)) { XLogRecPtr recptr; recptr = XLogInsert(RM_GIN_ID, XLOG_GIN_SPLIT, rdata); PageSetLSN(page, recptr); PageSetTLI(page, ThisTimeLineID); PageSetLSN(lpage, recptr); PageSetTLI(lpage, ThisTimeLineID); PageSetLSN(rpage, recptr); PageSetTLI(rpage, ThisTimeLineID); } UnlockReleaseBuffer(rbuffer); UnlockReleaseBuffer(lbuffer); LockBuffer(stack->buffer, GIN_UNLOCK); END_CRIT_SECTION(); freeGinBtreeStack(stack); /* During index build, count the newly-added root page */ if (buildStats) { if (btree->isData) buildStats->nDataPages++; else buildStats->nEntryPages++; } return; } else { /* split non-root page */ ((ginxlogSplit *) (rdata->data))->isRootSplit = FALSE; ((ginxlogSplit *) (rdata->data))->rrlink = savedRightLink; lpage = BufferGetPage(stack->buffer); rpage = BufferGetPage(rbuffer); GinPageGetOpaque(rpage)->rightlink = savedRightLink; GinPageGetOpaque(newlpage)->rightlink = BufferGetBlockNumber(rbuffer); START_CRIT_SECTION(); PageRestoreTempPage(newlpage, lpage); MarkBufferDirty(rbuffer); MarkBufferDirty(stack->buffer); if (RelationNeedsWAL(btree->index)) { XLogRecPtr recptr; recptr = XLogInsert(RM_GIN_ID, XLOG_GIN_SPLIT, rdata); PageSetLSN(lpage, recptr); PageSetTLI(lpage, ThisTimeLineID); PageSetLSN(rpage, recptr); PageSetTLI(rpage, ThisTimeLineID); } UnlockReleaseBuffer(rbuffer); END_CRIT_SECTION(); } } btree->isDelete = FALSE; /* search parent to lock */ LockBuffer(parent->buffer, GIN_EXCLUSIVE); /* move right if it's needed */ page = BufferGetPage(parent->buffer); while ((parent->off = btree->findChildPtr(btree, page, stack->blkno, parent->off)) == InvalidOffsetNumber) { BlockNumber rightlink = GinPageGetOpaque(page)->rightlink; LockBuffer(parent->buffer, GIN_UNLOCK); if (rightlink == InvalidBlockNumber) { /* * rightmost page, but we don't find parent, we should use * plain search... */ ginFindParents(btree, stack, rootBlkno); parent = stack->parent; page = BufferGetPage(parent->buffer); break; } parent->blkno = rightlink; parent->buffer = ReleaseAndReadBuffer(parent->buffer, btree->index, parent->blkno); LockBuffer(parent->buffer, GIN_EXCLUSIVE); page = BufferGetPage(parent->buffer); } UnlockReleaseBuffer(stack->buffer); pfree(stack); stack = parent; } }