Stored procedures 从DBMS_元数据读取时发生Oracle错误

我不熟悉在Oracle中编写存储过程。我想将物化视图日志的创建脚本保存到一个临时表中。删除这些物化视图日志，然后使用临时表中存储的脚本重新创建它们，然后也删除该表。 这就是我到目前为止所做的，还有很长的路要走

create or replace PROCEDURE procPrintOutput
IS
  l_stmt VARCHAR2(512) := '';
  --create_table_stmt VARCHAR2(512) := 'create global temporary table temp(matViewLogQuery VARCHAR2(4000))';
  select_stmt VARCHAR2(512) := 'SELECT * from temp';
BEGIN
    DBMS_OUTPUT.PUT_LINE('1');
    DECLARE
    CURSOR LIST_OF_MVL IS SELECT * FROM USER_BASE_TABLE_MVIEWS;
        BEGIN
            DBMS_OUTPUT.PUT_LINE('2');
            FOR TEST IN LIST_OF_MVL 
          LOOP
            BEGIN
              DBMS_OUTPUT.PUT_LINE('owner : ' || TEST.OWNER || ' - name : ' || TEST.MASTER);
              l_stmt := 'insert into temp SELECT SYS.DBMS_METADATA.get_dependent_ddl (''MATERIALIZED_VIEW_LOG'', ''|| TEST.MASTER||'', ''|| TEST.OWNER ||'') from dual';
              EXECUTE IMMEDIATE (l_stmt);
            END;
          END LOOP;
        END;
  DBMS_OUTPUT.PUT_LINE('Done!');

END;

运行此命令时出现的错误是

ORA-31608: specified object of type MATERIALIZED_VIEW_LOG not found
ORA-06512: at "SYS.DBMS_METADATA", line 5088
ORA-06512: at "SYS.DBMS_METADATA", line 7681
ORA-06512: at line 1
ORA-06512: at "XXX.PROCPRINTOUTPUT", line 25
ORA-06512: at line 2

---

有什么想法吗

问题在于逃跑。这是如何修复的：

l_stmt := 'insert into temp SELECT SYS.DBMS_METADATA.get_dependent_ddl (''MATERIALIZED_VIEW_LOG'', '''||TEST.MASTER||''', '''||TEST.OWNER||''') from dual';

谢谢