3487 int sqlite3BtreeBeginTrans(Btree *p, int wrflag, int *pSchemaVersion){  in sqlite3BtreeBeginTrans()  argument
3499   if( p->inTrans==TRANS_WRITE || (p->inTrans==TRANS_READ && !wrflag) ){  in sqlite3BtreeBeginTrans()
3511   if( (pBt->btsFlags & BTS_READ_ONLY)!=0 && wrflag ){  in sqlite3BtreeBeginTrans()
3523     if( (wrflag && pBt->inTransaction==TRANS_WRITE)  in sqlite3BtreeBeginTrans()
3527     }else if( wrflag>1 ){  in sqlite3BtreeBeginTrans()
3558     if( pBt->pPage1==0 && wrflag ){  in sqlite3BtreeBeginTrans()
3574     if( rc==SQLITE_OK && wrflag ){  in sqlite3BtreeBeginTrans()
3578         rc = sqlite3PagerBegin(pPager, wrflag>1, sqlite3TempInMemory(p->db));  in sqlite3BtreeBeginTrans()
3613     p->inTrans = (wrflag?TRANS_WRITE:TRANS_READ);  in sqlite3BtreeBeginTrans()
3617     if( wrflag ){  in sqlite3BtreeBeginTrans()
3623       if( wrflag>1 ) pBt->btsFlags |= BTS_EXCLUSIVE;  in sqlite3BtreeBeginTrans()
3646     if( wrflag ){  in sqlite3BtreeBeginTrans()