在Oracle12C數據庫創建wm_concat函數
阿新 • • 發佈:2019-01-18
creat 出現 elf cut char rmi turn begin dba
當我們的程序需要連接12C數據庫時,原本使用wm_concat函數的地方會出現報錯,這是由於12C已經摒棄了wm_concat這個函數,可以采取的辦法有使用listagg函數代替wm_concat函數,但是程序中所有涉及wm_concat函數的地方都得改成listagg函數的寫法,所以為了減小修改程序的工作量,可以通過手工創建wm_concat函數來解決這個問題。
一、用sys用戶以SYSDBA身份登錄數據庫,執行以下命
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 ); /
--定義類型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; /
--自定義函數列表
CREATE OR REPLACE FUNCTION wm_concat(P1 VARCHAR2)
RETURN VARCHAR2 AGGREGATE USING WM_CONCAT_IMPL ;
/
二、創建同義詞並授權
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 /
在Oracle12C數據庫創建wm_concat函數