167   DbpageCursor *pCsr;  in dbpageOpen()  local
169   pCsr = (DbpageCursor *)sqlite3_malloc64(sizeof(DbpageCursor));  in dbpageOpen()
170   if( pCsr==0 ){  in dbpageOpen()
173     memset(pCsr, 0, sizeof(DbpageCursor));  in dbpageOpen()
174     pCsr->base.pVtab = pVTab;  in dbpageOpen()
175     pCsr->pgno = -1;  in dbpageOpen()
178   *ppCursor = (sqlite3_vtab_cursor *)pCsr;  in dbpageOpen()
186   DbpageCursor *pCsr = (DbpageCursor *)pCursor;  in dbpageClose()  local
187   if( pCsr->pPage1 ) sqlite3PagerUnrefPageOne(pCsr->pPage1);  in dbpageClose()
188   sqlite3_free(pCsr);  in dbpageClose()
197   DbpageCursor *pCsr = (DbpageCursor *)pCursor;  in dbpageNext()  local
198   pCsr->pgno++;  in dbpageNext()
203   DbpageCursor *pCsr = (DbpageCursor *)pCursor;  in dbpageEof()  local
204   return pCsr->pgno > pCsr->mxPgno;  in dbpageEof()
222   DbpageCursor *pCsr = (DbpageCursor *)pCursor;  in dbpageFilter()  local
229   pCsr->pgno = 1;   in dbpageFilter()
230   pCsr->mxPgno = 0;  in dbpageFilter()
236     pCsr->iDb = sqlite3FindDbName(db, zSchema);  in dbpageFilter()
237     if( pCsr->iDb<0 ) return SQLITE_OK;  in dbpageFilter()
239     pCsr->iDb = 0;  in dbpageFilter()
241   pBt = db->aDb[pCsr->iDb].pBt;  in dbpageFilter()
243   pCsr->pPager = sqlite3BtreePager(pBt);  in dbpageFilter()
244   pCsr->szPage = sqlite3BtreeGetPageSize(pBt);  in dbpageFilter()
245   pCsr->mxPgno = sqlite3BtreeLastPage(pBt);  in dbpageFilter()
248     pCsr->pgno = sqlite3_value_int(argv[idxNum>>1]);  in dbpageFilter()
249     if( pCsr->pgno<1 || pCsr->pgno>pCsr->mxPgno ){  in dbpageFilter()
250       pCsr->pgno = 1;  in dbpageFilter()
251       pCsr->mxPgno = 0;  in dbpageFilter()
253       pCsr->mxPgno = pCsr->pgno;  in dbpageFilter()
256     assert( pCsr->pgno==1 );  in dbpageFilter()
258   if( pCsr->pPage1 ) sqlite3PagerUnrefPageOne(pCsr->pPage1);  in dbpageFilter()
259   rc = sqlite3PagerGet(pCsr->pPager, 1, &pCsr->pPage1, 0);  in dbpageFilter()
268   DbpageCursor *pCsr = (DbpageCursor *)pCursor;  in dbpageColumn()  local
272       sqlite3_result_int(ctx, pCsr->pgno);  in dbpageColumn()
277       if( pCsr->pgno==((PENDING_BYTE/pCsr->szPage)+1) ){  in dbpageColumn()
280         sqlite3_result_zeroblob(ctx, pCsr->szPage);  in dbpageColumn()
282         rc = sqlite3PagerGet(pCsr->pPager, pCsr->pgno, (DbPage**)&pDbPage, 0);  in dbpageColumn()
284           sqlite3_result_blob(ctx, sqlite3PagerGetData(pDbPage), pCsr->szPage,  in dbpageColumn()
293       sqlite3_result_text(ctx, db->aDb[pCsr->iDb].zDbSName, -1, SQLITE_STATIC);  in dbpageColumn()
301   DbpageCursor *pCsr = (DbpageCursor *)pCursor;  in dbpageRowid()  local
302   *pRowid = pCsr->pgno;  in dbpageRowid()