Drop Tablespace Command Hangs even if Fix 9841075 Applied

刘泽宇

现象：
Trying to drop tablespace but the command hangs every time, Applied patch 9841075 but the issue still occurring.

When get error stack dump it stopped in the below statement:

----- Current SQL Statement for this session (sql_id=cgcsnk9j6cuha) -----
select NULL from   (select obj# objnum# from tab$ where ts#=:1 and bitand(property, 32) = 0            union all    select bo# objnum# from tabpart$ where ts#=:1            union all    select tcp.bo# objnum
# from tabcompart$ tcp,tabsubpart$ tsp       where tsp.ts#=:1 and tsp.pobj#=tcp.obj#            union all    select t.obj# objnum# from tab$ t, ind$ i where i.ts#=:1 and         i.type#=4 and i.bo#=t.obj# an
d bitand(t.property, 32) = 0            union all    select t.obj# objnum# from indpart$ ip,ind$ i,tab$ t where ip.ts#=:1 and         i.type#=4 and i.bo#=t.obj# and ip.bo#=i.obj#            union all    sele
ct t.obj# objnum# from indcompart$ icp,indsubpart$ isp,ind$ i,tab$ t       where isp.ts#=:1 and isp.pobj#=icp.obj# and         i.type#=4 and i.bo#=t.obj# and icp.bo#=i.obj#   ) tin,    cdef$ cdef where tin.o
bjnum# = cdef.robj# and    cdef.obj# in    (select obj# objnum# from tab$ where ts#<>:1 and bitand(property, 32) = 0          union all     select distinct bo# objnum# from tabpart$ where ts#<>:1          un
ion all     select distinct tcp.bo# objnum# from tabcompart$ tcp,tabsubpart$ tsp       where tsp.ts#<>:1 and tsp.pobj#=tcp.obj#          union all     select t.obj# objnum# from tab$ t,ind$ i where i.ts#<>:1
and          i.type#=4 and i.bo#=t.obj# and bitand(t.property, 32) = 0          union all     select distinct t.obj# objnum# from indpart$ ip,ind$ i,tab$ t       where ip.ts#<>:1 and          i.type#=4 and
i.bo#=t.obj# and ip.bo#=i.obj#          union all     select distinct t.obj# objnum#       from indcompart$ icp,indsubpart$ isp,ind$ i,tab$ t       where isp.ts#<>:1 and isp.pobj#=icp.obj# and         i.type
#=4 and i.bo#=t.obj# and icp.bo#=i.obj#    )


原因：

Stale statistics for data dictionary and the fixed tables is the reason

处理方法：
Run the below to gather dictionary and fixed objects statistics:



SQL> EXEC DBMS_STATS.GATHER_SCHEMA_STATS ('SYS');
SQL> EXEC DBMS_STATS.GATHER_DATABASE_STATS (gather_sys=>TRUE);
SQL> EXEC DBMS_STATS.GATHER_DICTIONARY_STATS;
SQL> EXEC DBMS_STATS.GATHER_FIXED_OBJECTS_STATS;