继承与Oracle对象

Question

我尝试实现继承与Oracle对象：

CREATE OR REPLACE TYPE ENREG_320_BASE AS OBJECT (.....) NOT FINAL 
CREATE OR REPLACE TYPE ENREG_320_03 AS OBJECT UNDER ENREG_320_BASE(.....) FINAL 

我有一个错误：

Error: ORA-06550: line 1, column 29: PLS-00103: Encountered the symbol "UNDER" when expecting one of the following:

(not external JAVA_ BOUND_ The symbol "(" was substituted for "UNDER" to continue. ORA-06550: line 2, column 17: PLS-00103: Encountered the symbol "VARCHAR2" when expecting one of the following:

. () , * @ % & | = - + </> at in is mod remainder not range rem => .. <> or != or ~= >= <= <> and or like LIKE2_ LIKE4_ LIKE ORA-06550: line 3, column 27: PLS-00103: Encountered the symbol "VARCHAR2" when expecting one of the following:

有可能是我做的事情错了（第一次尝试在PLSQL继承） 。你能帮我吗 ？

PS：我用的是Oracle 10

工作谢谢

Answer 1

创建子类型时，我们不需要为研究对象。它由UNDER关键字暗示。

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