108983   MergeEngine *pMain = 0;  local
108993     pMain = vdbeMergeEngineNew(pSorter->nTask);
108994     if( pMain==0 ) rc = SQLITE_NOMEM_BKPT;
109027         if( pMain!=0 ){
109028           rc = vdbeIncrMergerNew(pTask, pRoot, &pMain->aReadr[iTask].pIncr);
109032           assert( pMain==0 );
109033           pMain = pRoot;
109042     vdbeMergeEngineFree(pMain);
109043     pMain = 0;
109045   *ppOut = pMain;
109061   MergeEngine *pMain = 0;  local
109071   rc = vdbeSorterMergeTreeBuild(pSorter, &pMain);
109086         rc = vdbeIncrMergerNew(pLast, pMain, &pReadr->pIncr);
109091             if( (pIncr = pMain->aReadr[iTask].pIncr) ){
109106             PmaReader *p = &pMain->aReadr[iTask];
109114         pMain = 0;
109122       rc = vdbeMergeEngineInit(pTask0, pMain, INCRINIT_NORMAL);
109123       pSorter->pMerger = pMain;
109124       pMain = 0;
109129     vdbeMergeEngineFree(pMain);
161599   Btree *pMain;           /* The database being vacuumed */  local
161655   pMain = db->aDb[iDb].pBt;
161656   isMemDb = sqlite3PagerIsMemdb(sqlite3BtreePager(pMain));
161682   nRes = sqlite3BtreeGetRequestedReserve(pMain);
161710   sqlite3BtreeSetSpillSize(pTemp, sqlite3BtreeSetSpillSize(pMain,0));
161719   rc = sqlite3BtreeBeginTrans(pMain, pOut==0 ? 2 : 0, 0);
161723   if( sqlite3PagerGetJournalMode(sqlite3BtreePager(pMain))
161730   if( sqlite3BtreeSetPageSize(pTemp, sqlite3BtreeGetPageSize(pMain), nRes, 0)
161740                                            sqlite3BtreeGetAutoVacuum(pMain));
161816     assert( pOut!=0 || SQLITE_TXN_WRITE==sqlite3BtreeTxnState(pMain) );
161822       sqlite3BtreeGetMeta(pMain, aCopy[i], &meta);
161828       rc = sqlite3BtreeCopyFile(pMain, pTemp);
161835       sqlite3BtreeSetAutoVacuum(pMain, sqlite3BtreeGetAutoVacuum(pTemp));
161843     rc = sqlite3BtreeSetPageSize(pMain, sqlite3BtreeGetPageSize(pTemp), nRes,1);
161854   sqlite3BtreeSetPageSize(pMain, -1, 0, 1);
226755   rbu_file *pMain;                /* List of main db files */  member
230882     for(pIter=pRbuVfs->pMain; pIter; pIter=pIter->pMainNext);
230883     p->pMainNext = pRbuVfs->pMain;
230884     pRbuVfs->pMain = p;
230901   for(pp=&p->pRbuVfs->pMain; *pp && *pp!=p; pp=&((*pp)->pMainNext)){}
230925     for(pDb=pRbuVfs->pMain; pDb && pDb->zWal!=zWal; pDb=pDb->pMainNext){}
230958   assert( p->pMainNext==0 && p->pRbuVfs->pMain!=p );