在Oracle的游标中，能select * from table; 这个table是变量吗

create or replace procedure test

as

 cursor ctables is select * from all_t_pk;

 each_row ctables%rowtype;

 table_name varchar(255);

 column_name varchar(255);

 maxId number;

 begin

  open ctables;

  loop

     fetch ctables into each_row;

     exit when ctables%notfound;



     table_name := each_row.table_name;

     column_name := each_row.column_name;



      --问题就在这个代码，我想column_name 和table_name 都是变量？？

      select max(column_name) into maxId from table_name;



     dbms_output.put_line(table_name||'-'||column_name);

  end loop;

end test;

 
 加了这句就通过不了：
 select max(column_name) into maxId from table_name;
 能否这样动态指定字段和表呢？？大侠们，急救!!!

下面是游标遍历的表。都是些表和主键。
select * from all_t_pk;

TABLE_NAME                     COLUMN_NAME
------------------------------ --------------------------------------------
COMMON_ANSWER                  ANSWER_ID
COMMON_ANSWER_DETAILS          ANSWER_DETAILS_ID
COMMON_EXEM                    EXAM_ID
COMMON_EXEM_DETAILS            EXAM_DETAIL_ID
CONFIG_MAJOR                   MAJOR_ID
CONFIG_MAJOR_KIND              MAJOR_KIND_ID
CONFIG_PUBLIC_ATTRIBUTE        ATTRIBUTE_ID
CONFIG_QUESTIONS               QUESTION_ID
CONFIG_QUESTION_OPTION         OPTION_ID
ENGAGE_INERVIEW                INTERVIEW_ID
ENGAGE_MAJOR_ISSUE             MAJOR_ISSUE_ID
ENGAGE_RESUME                  RESUME_ID
HUMAN_ARCHIVE                  HUMANID
HUMAN_ARCHIVE_CHANGE           HUMANCHANGEID
HUMAN_ATTENDANCE               TIME_SHEET_ID
HUMAN_BONUS                    BONUSID
HUMAN_MAJOR_CHANGE             MAJORCHANGEID
MERITRATING                    MERITRATINGID
MERITRATINGDETAIL              MER