ORA-29256: Cursor contains both regular and array defines which is illegal

文档解释

ORA-29256: Cursor contains both regular and array defines which is illegal

Cause: Both define_array and define_column have been called on this cursor. This is illegal. It is not possible for a cursor to both contain regular and array defines. The semantics of this setting are nonsensical. Array defines are used to move data from select queries into PL/SQL tables and regular defines to move data from select queries into PL/SQL variables.

Action: Modify your PL/SQL program to only perform calls to one of the two functions depending on the situation at hand.

ORA-29256错误表明在开启一个游标的时候，存在游标中包含的既有普通定义变量又有数组定义变量，而这是一种不合法的状态，所以出现了ORA-29256这个错误。

官方解释

常见案例

一般处理方法及步骤

(1) 将游标中的所有变量都替换为数组变量；

(2) 如果只需要替换单个变量，则只保留游标中的单个变量，而不是数组变量；

(3) 使用带有无参数的for循环来处理查询的结果，而不是使用带有可变参数的for循环，例如使用for x in (select ..) 而不是for x in (select …) 中的这样的可变参数；

(4) 将“select … into …”改写为批量更新以替换多个变量；

(5) 尝试使用一些其他技术，如 INTO 接口，代替数组变量。