#oracle12c中不支持wm_concat函数解决办法
#参考链接:https://blog.51cto.com/996665552/2344174
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 ; /
--创建同义词并授权
create public synonym WM_CONCAT_IMPL for sys.WM_CONCAT_IMPL / create public synonym wm_concat for sys.wm_concat / grant execute on WM_CONCAT_IMPL to public / grant execute on wm_concat to public /
执行之后进行验证！
