25   int *aXRef,          /* Mapping from columns of pTab to entries in pChanges */
100   int *aXRef,       /* aXRef[j]>=0 if column j is being updated */  in indexColumnIsBeingUpdated()  argument
106     return aXRef[iIdxCol]>=0;  in indexColumnIsBeingUpdated()
112                                             aXRef,chngRowid);  in indexColumnIsBeingUpdated()
129   int *aXRef,       /* aXRef[j]>=0 if column j is being updated */  in indexWhereClauseMightChange()  argument
134                                             aXRef, chngRowid);  in indexWhereClauseMightChange()
308   int *aXRef = 0;        /* aXRef[i] is the index in pChanges->a[] of the  in sqlite3Update()  local
440   aXRef = sqlite3DbMallocRawNN(db, sizeof(int) * (pTab->nCol+nIdx+1) + nIdx+2 );  in sqlite3Update()
441   if( aXRef==0 ) goto update_cleanup;  in sqlite3Update()
442   aRegIdx = aXRef+pTab->nCol;  in sqlite3Update()
446   for(i=0; i<pTab->nCol; i++) aXRef[i] = -1;  in sqlite3Update()
494         aXRef[j] = i;  in sqlite3Update()
519         aXRef[j] = -1;  in sqlite3Update()
544         if( aXRef[i]>=0 ) continue;  in sqlite3Update()
548                  aXRef, chngRowid)  in sqlite3Update()
550           aXRef[i] = 99999;  in sqlite3Update()
565   hasFK = sqlite3FkRequired(pParse, pTab, aXRef, chngKey);  in sqlite3Update()
575      || indexWhereClauseMightChange(pIdx,aXRef,chngRowid)  in sqlite3Update()
582         if( indexColumnIsBeingUpdated(pIdx, i, aXRef, chngRowid) ){  in sqlite3Update()
654     updateVirtualTable(pParse, pTabList, pTab, pChanges, pRowidExpr, aXRef,  in sqlite3Update()
937       j = aXRef[i];  in sqlite3Update()
1004         }else if( aXRef[i]<0 && i!=pTab->iPKey ){  in sqlite3Update()
1023         aXRef, 0);  in sqlite3Update()
1039       sqlite3FkCheck(pParse, pTab, regOldRowid, 0, aXRef, chngKey);  in sqlite3Update()
1083       sqlite3FkCheck(pParse, pTab, 0, regNewRowid, aXRef, chngKey);  in sqlite3Update()
1097       sqlite3FkActions(pParse, pTab, pChanges, regOldRowid, aXRef, chngKey);  in sqlite3Update()
1142   sqlite3DbFree(db, aXRef); /* Also frees aRegIdx[] and aToOpen[] */  in sqlite3Update()
1190   int *aXRef,          /* Mapping from columns of pTab to entries in pChanges */  in updateVirtualTable()  argument
1233       if( aXRef[iPk]>=0 ){  in updateVirtualTable()
1234         pRow = sqlite3ExprDup(db, pChanges->a[aXRef[iPk]].pExpr, 0);  in updateVirtualTable()
1242       if( aXRef[i]>=0 ){  in updateVirtualTable()
1244           sqlite3ExprDup(db, pChanges->a[aXRef[i]].pExpr, 0)  in updateVirtualTable()
1267       if( aXRef[i]>=0 ){  in updateVirtualTable()
1268         sqlite3ExprCode(pParse, pChanges->a[aXRef[i]].pExpr, regArg+2+i);  in updateVirtualTable()