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Issue of SERIAL# Value Displayed as Negative When Querying V$SESSION

Document Type | Technical Information

Category | Administration

Applicable Product Versions | 5SP1FS01, 5SP1FS02, 5SP1FS03, 5SP1FS04, 5SP1FS06, 6FS01, 6FS02, 6FS03, 6FS04, 6FS05, 6FS06, 6FS07

Document Number | TADTI031

 

Issue

When querying V$SESSION due to reasons such as SESSION KILL, the SERIAL# value may be displayed as a negative number.
Below is an example of this phenomenon.
SQL> select sid, serial# from v$session;

 SID      SERIAL#
----  -----------
 130  -2138093902
 

Cause

Although the SERIAL# value is internally managed as an unsigned int, it is implemented to be converted to an int when storing the value in the _vt_session table. As a result, if the unsigned int value exceeds INT_MAX (2,147,483,647), it is displayed as a negative number during the int conversion process.
 
 

Solutions

By applying patch FS07_227758a, the SERIAL# value has been corrected to display properly.
Caution
Apply the patch through technical support provided by Tmax Tibero.
Note
You can work around this issue by adding 4294967296 to the SERIAL# value displayed as negative to convert it to the correct value.
SQL > alter system session kill (130, 2156873394);

System altered.
 
 
 

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