[20180130]sqlplus字段显示问题.txt
--//昨天下班别人问的问题,就是drop table后使用flashback table恢复,为什么不顺带把索引名字给修改回来.
--//我解答也许避免重名问题吧.不过我在跟踪时发现一些细节,做一些简单探究.
1.环境:
SCOTT@book> @ &r/ver1
PORT_STRING VERSION BANNER
------------------------------ -------------- --------------------------------------------------------------------------------
x86_64/Linux 2.4.xx 11.2.0.4.0 Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
create table deptx as select * from dept;
create index pk_deptx on deptx(deptno);
drop table deptx ;
SCOTT@book> select OBJ#,OWNER#,ORIGINAL_NAME,DROPSCN,FLAGS from sys.recyclebin$;
OBJ# OWNER# ORIGINAL_NAME DROPSCN FLAGS
------------ ------------ -------------------------------- ------------ ------------
91061 83 PK_DEPTX 13278152690 18
91060 83 DEPTX 13278152694 30
--//可以发现原始的对象名,oracle是知道的.
--//我在做一些跟踪时,发现执行如下:
SCOTT@book> show recyc
ORIGINAL NAME RECYCLEBIN NAME OBJECT TYPE DROP TIME
---------------- ------------------------------ ------------ -------------------
DEPTX BIN$Y/SRPk++5tPgU05kqMDL8Q==$0 TABLE 2018-01-30:08:37:28
--//执行做了过滤实际上执行如下,只不过加了where条件,不显示索引.(我取消了)
SELECT ORIGINAL_NAME ORIGNAME_PLUS_SHOW_RECYC
,OBJECT_NAME OBJECTNAME_PLUS_SHOW_RECYC
,TYPE OBJTYPE_PLUS_SHOW_RECYC
,DROPTIME DROPTIME_PLUS_SHOW_RECYC
FROM USER_RECYCLEBIN ;
ORIGINAL NAME RECYCLEBIN NAME OBJECT TYPE DROP TIME
---------------- ------------------------------ ------------ -------------------
PK_DEPTX BIN$Y/SRPk+95tPgU05kqMDL8Q==$0 INDEX 2018-01-30:08:37:28
DEPTX BIN$Y/SRPk++5tPgU05kqMDL8Q==$0 TABLE 2018-01-30:08:37:28
--//你可以注意ORIGNAME_PLUS_SHOW_RECYC实际上显示的是ORIGINAL NAME(中间有空格).很明显登录sqlplus时oracle定义了ORIGNAME_PLUS_SHOW_RECYC.
SCOTT@book> col ORIGNAME_PLUS_SHOW_RECYC
COLUMN origname_plus_show_recyc ON
HEADING 'ORIGINAL NAME'
FORMAT a16
--//如果你使用toad,就没有上面的显示字段名.
--//问题是这个定义写在那里,那个文件,做一个简单探究.
$ strings $(which sqlplus) | grep -i ORIGNAME_PLUS_SHOW_RECYC
$ strings $(which oracle) | grep -i ORIGNAME_PLUS_SHOW_RECYC
--//没有sqlplus.oracle执行文件中.
$ strace -e trace=open -o /tmp/xx.out sqlplus scott/book
$ egrep -v "No such file or directory" /tmp/xx.out | cut -d\" -f2 | xargs -I {} strings {} | grep -i ORIGNAME_PLUS_SHOW_RECYC
origname_plus_show_recyc FORMAT a16 HEADING 'ORIGINAL NAME'
SELECT ORIGINAL_NAME ORIGNAME_PLUS_SHOW_RECYC,OBJECT_NAME OBJECTNAME_PLUS_SHOW_RECYC,TYPE OBJTYPE_PLUS_SHOW_RECYC,DROPTIME DROPTIME_PLUS_SHOW_RECYC FROM USER_RECYCLEBIN WHERE CAN_UNDROP='YES'
COLUMN origname_plus_show_recyc FORMAT a16 HEADING 'ORIGINAL NAME'
column origname_plus_show_recyc FORMAT a16 HEADING 'ORIGINAL NAME'
--//无法知道是那个文件.修改如下:
$ egrep -v "No such file or directory" /tmp/xx.out | cut -d\" -f2 | xargs -I {} strings --print-file-name {} | grep -i ORIGNAME_PLUS_SHOW_RECYC
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libsqlplus.so: origname_plus_show_recyc FORMAT a16 HEADING 'ORIGINAL NAME'
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libsqlplus.so: SELECT ORIGINAL_NAME ORIGNAME_PLUS_SHOW_RECYC,OBJECT_NAME OBJECTNAME_PLUS_SHOW_RECYC,TYPE OBJTYPE_PLUS_SHOW_RECYC,DROPTIME DROPTIME_PLUS_SHOW_RECYC FROM USER_RECYCLEBIN WHERE CAN_UNDROP='YES'
--//很明显在使用sqlplus是调用了/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libsqlplus.so.里面定义了origname_plus_show_recyc的显示
--//实际上链接http://blog.itpub.net/267265/viewspace-2146887/.
--//VALUE_COL_PLUS_SHOW_SPPARAM应该也是存在这个文件里面的.
$ egrep -v "No such file or directory" /tmp/xx.out | cut -d\" -f2 | xargs -I {} strings --print-file-name {} | grep -i VALUE_COL_PLUS_SHOW_SPPARAM
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libsqlplus.so: VALUE_COL_PLUS_SHOW_SPPARAM FORMAT a28 word_wrapped HEADING VALUE
/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libsqlplus.so: SELECT SID SID_COL_PLUS_SHOW_SPPARAM, NAME NAME_COL_PLUS_SHOW_SPPARAM, TYPE, DISPLAY_VALUE VALUE_COL_PLUS_SHOW_SPPARAM FROM V$SPPARAMETER WHERE UPPER(NAME) LIKE UPPER(:NMBIND_SHOW_OBJ) ORDER BY NAME_COL_PLUS_SHOW_SPPARAM,VALUE_COL_PLUS_SHOW_SPPARAM
/u01/app/oracle/product/11.2.0.4/dbhome_1/sqlplus/admin/zzlogin.sql: column value_col_plus_show_spparam format a100
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--//最后调用我定义的zzlogin.sql,修改显示宽度.
