db2 在修改表名的时候，表上不能有外键约束，不能被视图引用。。。。。。。。。

--例子

RENAME TABLE TPA_AVMACCOUNTTO TCASH_AVMACCOUNT  ;                                                                                                                 
RENAME TABLE TPA_BOMACCOUNT TO  TCASH_BOMACCOUNT  ;                                                                                                                 
RENAME TABLE TPA_CSCTICKET TO TCASH_CSCTICKET   ;                                                                                                                  
RENAME TABLE TPA_HEADINFO TO  TCASH_HEADINFO   ; 

--db2 报了一大堆错误（刚开始有点怕怕的）

在发出 RENAME 语句之前，删除依赖于此表的视图、具体化查询表、触发器、SQL
函数、SQL 方法、检查约束、引用约束或 XSR 对象。对于依赖于此表的视图或具
体化查询表，请查询 SYSCAT.VIEWDEP 并使表与 BSCHEMA 和 BNAME 列匹配。对
于依赖于此表的触发器，请查询 SYSCAT.TRIGDEP 并使表与 BSCHEMA 和 BNAME
列匹配。对于 SQL 函数或 SQL 方法，请查询 SYSCAT.FUNCDEP 并使表与 BSCHEMA
和 BNAME 列匹配。对于表的检查约束，请查询 SYSCAT.CHECKS 并使表与
TABSCHEMA 和 TABBNAME 列匹配。对于依赖于此表的引用约束，请查询
SYSCAT.REFERENCES 并使表与 TABSCHEMA 和 TABNAME 列或者 REFTABSCHEMA 和
REFTABNAME 列匹配。对于为了进行将此表作为目标的分解而启用的 XSR 对象，
请查询 SYSCAT.XSROBJECTDEP 并使表与 BSCHEMA 和 BNAME 列匹配。 

--看来限制条件真多，根据错误提示，查看对象的依赖性

select * from SYSCAT.VIEWDEP where bschema='L_SZ_V16' AND BNAME IN('TPA_AVMACCOUNT','TPA_BOMACCOUNT','TPA_CSCTICKET','TPA_HEADINFO');
select * from SYSCAT.TRIGDEP  where bschema='L_SZ_V16' AND BNAME IN('TPA_AVMACCOUNT','TPA_BOMACCOUNT','TPA_CSCTICKET','TPA_HEADINFO');
select * from  SYSCAT.FUNCDEP  where bschema='L_SZ_V16' AND BNAME IN('TPA_AVMACCOUNT','TPA_BOMACCOUNT','TPA_CSCTICKET','TPA_HEADINFO');
SELECT * FROM  SYSCAT.CHECKS  WHERE TABSCHEMA='L_SZ_V16' AND TABNAME IN('TPA_AVMACCOUNT','TPA_BOMACCOUNT','TPA_CSCTICKET','TPA_HEADINFO');
SELECT * FROM SYSCAT.REFERENCES  WHERE TABSCHEMA='L_SZ_V16' AND TABNAME IN('TPA_AVMACCOUNT','TPA_BOMACCOUNT','TPA_CSCTICKET','TPA_HEADINFO');
SELECT * FROM SYSCAT.REFERENCES  WHERE REFTABSCHEMA='L_SZ_V16' AND REFTABNAME IN('TPA_AVMACCOUNT','TPA_BOMACCOUNT','TPA_CSCTICKET','TPA_HEADINFO');
SELECT * FROM SYSCAT.XSROBJECTDEP WHERE  bschema='L_SZ_V16' AND BNAME IN('TPA_AVMACCOUNT','TPA_BOMACCOUNT','TPA_CSCTICKET','TPA_HEADINFO');

查看后，发现表上有外键约束，其他的都没有

--执行删除外键的sql

ALTER TABLE TPA_AVMACCOUNT DROP FOREIGN KEY FK57641F8FB2FBC862;                                                                               ALTER TABLE TPA_CSCTICKET DROP FOREIGN KEY FK3505A84597A0F542;
COMMIT;

RENAME TABLE TPA_AVMACCOUNT TO  TCASH_AVMACCOUNT                                        ;                                         RENAME TABLE TPA_BOMACCOUNT TO  TCASH_BOMACCOUNT                                        ;                                         RENAME TABLE TPA_CSCTICKET TO  TCASH_CSCTICKET                                         ;                                         RENAME TABLE TPA_HEADINFO TO  TCASH_HEADINFO                                          ;  
COMMIT;
--执行创建外键的sql，表名TPA_开头的都修改为 TCASH开头，然后执行。
ALTER TABLE TCASH_CSCTICKET ADD CONSTRAINT FK3505A84597A0F542 FOREIGN KEY (BOMACCOUNT_RECORDID) REFERENCES TCASH_BOMACCOUNT(RECORDID) ON DELETE CASCADE ON UPDATE RESTRICT ENFORCED  ENABLE QUERY OPTIMIZATION;                                                                                     ALTER TABLE TCASH_AVMACCOUNT ADD CONSTRAINT FK57641F8FB2FBC862 FOREIGN KEY (HEADINFO_RECORDID) REFERENCES TCASH_HEADINFO(RECORDID) ON DELETE CASCADE ON UPDATE RESTRICT ENFORCED  ENABLE QUERY OPTIMIZATION;                                                                                     COMMIT;