2582 static Select *isCandidateForInOpt(const Expr *pX){  in isCandidateForInOpt()  argument
2588   if( !ExprUseXSelect(pX) ) return 0;                 /* Not a subquery */  in isCandidateForInOpt()
2589   if( ExprHasProperty(pX, EP_VarSelect)  ) return 0;  /* Correlated subq */  in isCandidateForInOpt()
2590   p = pX->x.pSelect;  in isCandidateForInOpt()
2742   Expr *pX,                  /* The IN expression */  in sqlite3FindInIndex()  argument
2754   assert( pX->op==TK_IN );  in sqlite3FindInIndex()
2763   if( prRhsHasNull && ExprUseXSelect(pX) ){  in sqlite3FindInIndex()
2765     ExprList *pEList = pX->x.pSelect->pEList;  in sqlite3FindInIndex()
2777   if( pParse->nErr==0 && (p = isCandidateForInOpt(pX))!=0 ){  in sqlite3FindInIndex()
2816         Expr *pLhs = sqlite3VectorFieldSubexpr(pX->pLeft, i);  in sqlite3FindInIndex()
2859             Expr *pLhs = sqlite3VectorFieldSubexpr(pX->pLeft, i);  in sqlite3FindInIndex()
2919    && ExprUseXList(pX)  in sqlite3FindInIndex()
2920    && (!sqlite3InRhsIsConstant(pX) || pX->x.pList->nExpr<=2)  in sqlite3FindInIndex()
2939     assert( pX->op==TK_IN );  in sqlite3FindInIndex()
2940     sqlite3CodeRhsOfIN(pParse, pX, iTab);  in sqlite3FindInIndex()
2949     n = sqlite3ExprVectorSize(pX->pLeft);  in sqlite3FindInIndex()
4786       Expr *pX;                         /* The X expression */  in sqlite3ExprCodeTarget()  local
4797       if( (pX = pExpr->pLeft)!=0 ){  in sqlite3ExprCodeTarget()
4798         pDel = sqlite3ExprDup(db, pX, 0);  in sqlite3ExprCodeTarget()
4803         testcase( pX->op==TK_COLUMN );  in sqlite3ExprCodeTarget()
4817         if( pX ){  in sqlite3ExprCodeTarget()