今天工具箱報錯：

-------下文是英文解釋-----

ORA-08103: object no longer exists錯誤，
后描述是其中一進程順序執行truncate，insert動作，而同時有另一進程對
同一表做select動作，造成ora-8103
metalink資料：
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

?

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另ora-08103還有其他解釋：

Solution: 'ORA-8103: Object no longer exists' When Insert Into External Table after Truncate With Storage Performed

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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

.

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.