oracle中，行转列函数wm_concat()结果有长度限制，重写该函数解决

--TypeCREATE OR REPLACE TYPE yxwsp.zh_concat_im   AS OBJECT(  CURR_STR clob,  STATIC FUNCTION ODCIAGGREGATEINITIALIZE(SCTX IN OUT zh_concat_im)    RETURN NUMBER,  MEMBER FUNCTION ODCIAGGREGATEITERATE(SELF IN OUT zh_concat_im,                                       P1   IN VARCHAR2) RETURN NUMBER,  MEMBER FUNCTION ODCIAGGREGATETERMINATE(SELF        IN zh_concat_im,                                         RETURNVALUE OUT clob,                                         FLAGS       IN NUMBER)    RETURN NUMBER,  MEMBER FUNCTION ODCIAGGREGATEMERGE(SELF  IN OUT zh_concat_im,                                     SCTX2 IN zh_concat_im) RETURN NUMBER);--TYPE BODYCREATE OR REPLACE TYPE BODY  yxwsp.zh_concat_im IS  STATIC FUNCTION ODCIAGGREGATEINITIALIZE(SCTX IN OUT zh_concat_im)    RETURN NUMBER IS  BEGIN    SCTX := zh_concat_im(NULL);    RETURN ODCICONST.SUCCESS;  END;  MEMBER FUNCTION ODCIAGGREGATEITERATE(SELF IN OUT zh_concat_im,                                       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 zh_concat_im,                                         RETURNVALUE OUT clob,                                         FLAGS       IN NUMBER) RETURN NUMBER IS  BEGIN    RETURNVALUE := CURR_STR;    RETURN ODCICONST.SUCCESS;  END;  MEMBER FUNCTION ODCIAGGREGATEMERGE(SELF  IN OUT zh_concat_im,                                     SCTX2 IN zh_concat_im) 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; /--FUNCTION create or replace FUNCTION  yxwsp.zh_concat(P1 VARCHAR2) RETURN clob AGGREGATE USING zh_concat_im;