SQLite

    }
  }
  return 0;
}

#ifndef SQLITE_OMIT_WINDOWFUNC
/*
** Walker callback for sqlite3WindowRemoveExprFromSelect() and
** sqlite3WindowRemoveExprListFromSelect()
*/
static int resolveRemoveWindowsCb(Walker *pWalker, Expr *pExpr){
  if( ExprHasProperty(pExpr, EP_WinFunc) ){
    Window **pp;
    for(pp=&pWalker->u.pSelect->pWin; *pp; pp=&(*pp)->pNextWin){
      if( *pp==pExpr->y.pWin ){
        *pp = (*pp)->pNextWin;
        break;
      }    
    }
  }
  return WRC_Continue;
}

/*
** Remove any Window objects owned by the expression pExpr from the
** Select.pWin list of Select object pSelect.
*/
void sqlite3WindowRemoveExprFromSelect(Select *pSelect, Expr *pExpr){
  if( pSelect->pWin ){
    Walker sWalker;
    memset(&sWalker, 0, sizeof(Walker));
    sWalker.xExprCallback = resolveRemoveWindowsCb;
    sWalker.u.pSelect = pSelect;
    sqlite3WalkExpr(&sWalker, pExpr);
  }
}

/*
** Remove any Window objects owned by the expression list from the
** Select.pWin list of Select object pSelect.
*/
void sqlite3WindowRemoveExprListFromSelect(Select *pSelect, ExprList *pList){
  if( pList && pSelect->pWin ){
    int i;
    Walker sWalker;
    memset(&sWalker, 0, sizeof(Walker));
    sWalker.xExprCallback = resolveRemoveWindowsCb;
    sWalker.u.pSelect = pSelect;
    for(i=0; i<pList->nExpr; i++){
      sqlite3WalkExpr(&sWalker, pList->a[i].pExpr);
    }
  }
}
#endif /* SQLITE_OMIT_WINDOWFUNC */

/*
** pOrderBy is an ORDER BY or GROUP BY clause in SELECT statement pSelect.
** The Name context of the SELECT statement is pNC.  zType is either
** "ORDER" or "GROUP" depending on which type of clause pOrderBy is.
**
** This routine resolves each term of the clause into an expression.

      return 1;
    }
    for(j=0; j<pSelect->pEList->nExpr; j++){
      if( sqlite3ExprCompare(0, pE, pSelect->pEList->a[j].pExpr, -1)==0 ){
        /* Since this expresion is being changed into a reference
        ** to an identical expression in the result set, remove all Window
        ** objects belonging to the expression from the Select.pWin list. */
        sqlite3WindowRemoveExprFromSelect(pSelect, pE);
        pItem->u.x.iOrderByCol = j+1;
      }
    }
  }
  return sqlite3ResolveOrderGroupBy(pParse, pSelect, pOrderBy, zType);
}

  if( IgnorableOrderby(pDest) ){
    assert(pDest->eDest==SRT_Exists || pDest->eDest==SRT_Union || 
           pDest->eDest==SRT_Except || pDest->eDest==SRT_Discard ||
           pDest->eDest==SRT_Queue  || pDest->eDest==SRT_DistFifo ||
           pDest->eDest==SRT_DistQueue || pDest->eDest==SRT_Fifo);
    /* If ORDER BY makes no difference in the output then neither does
    ** DISTINCT so it can be removed too. */
    sqlite3WindowRemoveExprListFromSelect(p, p->pOrderBy);
    sqlite3ExprListDelete(db, p->pOrderBy);
    p->pOrderBy = 0;
    p->selFlags &= ~SF_Distinct;
  }
  sqlite3SelectPrep(pParse, p, 0);
  if( pParse->nErr || db->mallocFailed ){
    goto select_end;

int sqlite3ExpandSubquery(Parse*, struct SrcList_item*);
void sqlite3WindowUpdate(Parse*, Window*, Window*, FuncDef*);
Window *sqlite3WindowDup(sqlite3 *db, Expr *pOwner, Window *p);
Window *sqlite3WindowListDup(sqlite3 *db, Window *p);
void sqlite3WindowFunctions(void);
void sqlite3WindowChain(Parse*, Window*, Window*);
Window *sqlite3WindowAssemble(Parse*, Window*, ExprList*, ExprList*, Token*);
void sqlite3WindowRemoveExprFromSelect(Select*,Expr*);
void sqlite3WindowRemoveExprListFromSelect(Select*,ExprList*);
#else
# define sqlite3WindowDelete(a,b)
# define sqlite3WindowFunctions()
# define sqlite3WindowAttach(a,b,c)
# define sqlite3WindowRemoveExprFromSelect(Select*,Expr*);
# define sqlite3WindowRemoveExprListFromSelect(Select*,ExprList*);
#endif

/*
** Assuming zIn points to the first byte of a UTF-8 character,
** advance zIn to point to the first byte of the next UTF-8 character.
*/
#define SQLITE_SKIP_UTF8(zIn) {                        \