今天工具箱报错：
-------下文是英文解释-----
ORA-08103: object no longer exists错误，
后描述是其中一进程顺序执行truncate，insert动作，而同时有另一进程对
同一表做select动作，造成ora-8103
metalink资料：
fact: Oracle Server - Enterprise Edition 8
symptom: Error performing a SELECT statement
symptom: ORA-08103: object no longer exists
symptom: Table is being truncated by other session
symptom: Analyze table validate structure cascade returns no errors
cause: This ORA-08103 occurs on the next block read after the truncate
command.
The LOCK TABLE IN EXCLUSIVE MODE does not prevent the table from being
SELECTED from. Thus, when the query has started and while this query runs
and the truncate occurs, this ORA-08103 may surface on the next block read.
This is considered intended behavior.
When a TRUNCATE occurs the DATAOBJ# in OBJ$ gets increased by one and thus
may lead to this ORA-08103 'object no longer exists'
fix:
Possible solutions are:
- Use DELETE instead of TRUNCATE
- Use SELECT FOR UPDATE as this will try to lock the table
另ora-08103还有其他解释：
Solution: 'ORA-8103: Object no longer exists' When Insert Into External Table after Truncate With Storage Performed
Applies to:
Oracle Server - Enterprise Edition - Version: 10.2.0.1 to 10.2.0.3
This problem can occur on any platform.
Symptoms
The following error can occur on an insert with SQL Loader into an external organized table after a truncate with storage option has been performed
ORA-08103: object no longer exists
/*+ PARALLEL(a, 8)*/
into iad_o_ast_new a
select /*+ full(b) parallel(b,8)*/
* from iad_o_ast_ext b
where rownum<10000 ;
into iad_o_ast_new a
*
ERROR at line 3:
ORA-08103: object no longer exists
.
Changes
The table was truncated with storage option before the insert .
Cause
The bitmap information is not correct after truncating with the storage option. The solutions update the bitmap information in the tablespace.
Solution
There are two known solutions at this time.
1. Add another datafile to increase the size of the tablespace for the insert. You will need to still use the correct truncate option next time you truncate the table.
2. Drop the table and recreate it. You will need to still use the correct truncate option next time you truncate the table.
Do not truncate the table with the storage option.
truncate ;
truncate drop storage;
Use the following instead:
truncate reuse storage;
