11gr2和12C上已经摒弃了wm_concat函数，当时我们很多程序员在程序中确使用了该函数，导致程序出现错误，为了减轻程序员修改程序的工作量，只有通过手工创建个wm_concat函数，来临时解决该问题，但是注意，及时创建了该函数，在使用的过程中，也需要用to_char(wm_concat())方式，才能完全替代之前的应用。

一.解锁wmsys用户

alter user wmsys account unlock;

二.创建包、包体和函数

CREATE OR REPLACE TYPE WM_CONCAT_IMPL AS OBJECT

-- AUTHID CURRENT_USER AS OBJECT

(

CURR_STR VARCHAR2(32767),

STATIC FUNCTION ODCIAGGREGATEINITIALIZE(SCTX IN OUT WM_CONCAT_IMPL) RETURN NUMBER,

MEMBER FUNCTION ODCIAGGREGATEITERATE(SELF IN OUT WM_CONCAT_IMPL,

P1 IN VARCHAR2) RETURN NUMBER,

MEMBER FUNCTION ODCIAGGREGATETERMINATE(SELF IN WM_CONCAT_IMPL,

RETURNVALUE OUT VARCHAR2,

FLAGS IN NUMBER)

RETURN NUMBER,

MEMBER FUNCTION ODCIAGGREGATEMERGE(SELF IN OUT WM_CONCAT_IMPL,

SCTX2 IN WM_CONCAT_IMPL) RETURN NUMBER

);

/

上边不知道反证我们自己用的是下边那个:

CREATE OR REPLACE TYPE WMSYS.WM_CONCAT_IMPL AS OBJECT

-- AUTHID CURRENT_USER AS OBJECT

(

CURR_STR VARCHAR2(32767),

STATIC FUNCTION ODCIAGGREGATEINITIALIZE(SCTX IN OUT WM_CONCAT_IMPL) RETURN NUMBER,

MEMBER FUNCTION ODCIAGGREGATEITERATE(SELF IN OUT WM_CONCAT_IMPL,

P1 IN VARCHAR2) RETURN NUMBER,

MEMBER FUNCTION ODCIAGGREGATETERMINATE(SELF IN WM_CONCAT_IMPL,

RETURNVALUE OUT VARCHAR2,

FLAGS IN NUMBER)

RETURN NUMBER,

MEMBER FUNCTION ODCIAGGREGATEMERGE(SELF IN OUT WM_CONCAT_IMPL,

SCTX2 IN WM_CONCAT_IMPL) RETURN NUMBER

)

--定义类型body:

CREATE OR REPLACE TYPE BODY WM_CONCAT_IMPL

IS

STATIC FUNCTION ODCIAGGREGATEINITIALIZE(SCTX IN OUT WM_CONCAT_IMPL)

RETURN NUMBER

IS

BEGIN

SCTX := WM_CONCAT_IMPL(NULL) ;

RETURN ODCICONST.SUCCESS;

END;

MEMBER FUNCTION ODCIAGGREGATEITERATE(SELF IN OUT WM_CONCAT_IMPL,

P1 IN VARCHAR2)

RETURN NUMBER

IS

BEGIN

IF(CURR_STR IS NOT NULL) THEN

CURR_STR := CURR_STR || ',' || P1;

ELSE

CURR_STR := P1;

END IF;

RETURN ODCICONST.SUCCESS;

END;

MEMBER FUNCTION ODCIAGGREGATETERMINATE(SELF IN WM_CONCAT_IMPL,

RETURNVALUE OUT VARCHAR2,

FLAGS IN NUMBER)

RETURN NUMBER

IS

BEGIN

RETURNVALUE := CURR_STR ;

RETURN ODCICONST.SUCCESS;

END;

MEMBER FUNCTION ODCIAGGREGATEMERGE(SELF IN OUT WM_CONCAT_IMPL,

SCTX2 IN WM_CONCAT_IMPL)

RETURN NUMBER

IS

BEGIN

IF(SCTX2.CURR_STR IS NOT NULL) THEN

SELF.CURR_STR := SELF.CURR_STR || ',' || SCTX2.CURR_STR ;

END IF;

RETURN ODCICONST.SUCCESS;

END;

END;

/

--自定义行变列函数:

CREATE OR REPLACE FUNCTION wm_concat(P1 VARCHAR2)

RETURN VARCHAR2 AGGREGATE USING WM_CONCAT_IMPL ;

/

三.创建同义词并授权

create public synonym WM_CONCAT_IMPL for wmsys.WM_CONCAT_IMPL

/

create public synonym wm_concat for wmsys.wm_concat

/

grant execute on WM_CONCAT_IMPL to public

/

grant execute on wm_concat to public

/