为提高效率，提问时请提供以下信息，问题描述清晰可优先响应。
【DM版本】:8
【操作系统】：win10
【CPU】:
【问题描述】*：无效的表或视图名[tabpart$]

  ELSIF p_vrsn_id IS NOT NULL THEN
    /* If P_VSRN_ID is not null then drop partitions from T_VRSN_MD_REL  */
    l_step := 'PROCESS DROPPING PARTITION NAME';

    SELECT b.subname
        INTO v_part_nm
    FROM sys.tabpart$ A, sys.obj$ b
    WHERE sys.dbms_metadata_util.long2varchar( 4000 ,'SYS.TABPART$','HIBOUNDVAL', a.rowid) = ''''||p_vrsn_id||''''
      AND   a.obj# = b.obj#
      AND   b.name = 'T_VRSN_MD_REL'
    ;

    /* T_VRSN_MD_REL DROP PARTITION*/
    L_STEP := 'DROP T_VRSN_MD_REL PARTITION';

    execute immediate 'DELETE FROM t_vrsn_md_rel WHERE vrsn_id = '||''''||p_vrsn_id||'''';

    execute immediate 'ALTER TABLE t_vrsn_md_rel DROP PARTITION '||v_part_nm||' UPDATE GLOBAL INDEXES';