表达式不能用作分配目标

本文介绍了表达式不能用作分配目标的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个具有以下查询的函数，但它返回上述错误.我认为问题在于aty的粗体字

I have a function with following query but it returns above error. I think the problem is with bold line specifically with aty

CREATE OR REPLACE FUNCTION QtyStkToQty ( itemcode VARCHAR2, qty NUMBER, ConUOM VARCHAR2 ) RETURN VARCHAR IS vSupuomcon float; vConuomcon float; vuom varchar2(3); vunits number; retval float; nqty number; CURSOR cur_uom_units(c_itemcode varchar2) IS SELECT a.iu_uom_code, a.iu_units FROM (SELECT iu_uom_code, iu_units FROM sm_uom WHERE iu_item_code=c_itemcode AND iu_freez='N' AND rownum <= 3 ORDER BY iu_units ASC) a ORDER BY iu_units DESC; BEGIN retval:= 0; IF qty<> 0 THEN OPEN cur_uom_units(itemcode); FETCH cur_uom_units INTO vuom, vunits; LOOP FETCH cur_uom_units INTO vuom, vunits; EXIT WHEN cur_uom_units% NOTFOUND; retval := retval +' '+ CAST(FLOOR(qty/ vunits) AS varchar2); qty := qty-((qty/ vunits)*vunits); END LOOP; CLOSE cur_uom_units; ELSE retval := 0; RETURN retval; END IF; END;

推荐答案

我不熟悉oracle，但您被允许更改传入参数的值?可能是类型不匹配的问题吗? I''m not familiar with oracle, but are you permitted to change the value of an incoming parameter? Could it be a type mismatch problem?