1881       Select *pS = 0;             /* Select the column is extracted from */  in columnTypeImpl()  local
1888           pS = pTabList->a[j].pSelect;  in columnTypeImpl()
1916       if( pS ){  in columnTypeImpl()
1921         if( iCol<pS->pEList->nExpr  in columnTypeImpl()
1933           Expr *p = pS->pEList->a[iCol].pExpr;  in columnTypeImpl()
1934           sNC.pSrcList = pS->pSrc;  in columnTypeImpl()
1941         assert( !pS );  in columnTypeImpl()
1975       Select *pS;  in columnTypeImpl()  local
1978       pS = pExpr->x.pSelect;  in columnTypeImpl()
1979       p = pS->pEList->a[0].pExpr;  in columnTypeImpl()
1980       sNC.pSrcList = pS->pSrc;  in columnTypeImpl()
6417     Select *pS = pWalker->u.pSelect;  in havingToWhereExprCb()  local
6425     if( sqlite3ExprIsConstantOrGroupBy(pWalker->pParse, pExpr, pS->pGroupBy)   in havingToWhereExprCb()
6432         Expr *pWhere = pS->pWhere;  in havingToWhereExprCb()
6435         pS->pWhere = pNew;  in havingToWhereExprCb()