--sys用户下解锁wmsys用户
alter user wmsys account unlock;
--设置wmsys用户密码
alter user wmsys identified by XXXX;
--对wmsys用户进行授权
grant dba to wmsys;
--登录wmsys用户执行如下脚本即可：
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
);
/
--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 ;
/
drop public synonym WM_CONCAT_IMPL;
create public synonym WM_CONCAT_IMPL for wmsys.WM_CONCAT_IMPL
/
drop public synonym wm_concat;
create public synonym wm_concat for wmsys.wm_concat
/
grant execute on WM_CONCAT_IMPL to public
/
grant execute on wm_concat to public
/
使用listagg within代替wm_concat,例子如下:
原wm_concat:
select wmconcat(T.TABLE_NAME,',') from user_tables
t WHERE T.TABLE_NAME LIKE 'ST_TAB%' order by t.TABLE_NAME
等价于如下SQL:
select listagg(T.TABLE_NAME,',') within group(order by t.TABLE_NAME) tables
from user_tables t WHERE T.TABLE_NAME LIKE 'ST_TAB%'
listagg() +within group group by
或者：
listagg() + over(partition by )
自问自答？？
官方提供了listagg来替代wm_concat 为什么不用反而要自己写呢？