В таких случаях необходимо обращаться к Message Reference.
SQL0902C
SQL0902C A system error (reason code = reason-code) occurred. Subsequent SQL statements cannot be processed.

Explanation: A system error occurred.

User Response: Record the message number (SQLCODE) and reason code in the message.

If trace was active, invoke the Independent Trace Facility at the operating system command prompt. Then contact your technical service representative with the following information:

* Problem description
* SQLCODE and embedded reason code
* SQLCA contents if possible
* Trace file if possible.

Federated system users: isolate the problem to the data source failing the request (refer to the Troubleshooting Guide to determine which data source is failing to process the SQL statement) and take the necessary diagnostic steps for that data source. The problem determination procedures for data sources vary, so refer to the applicable data source manuals.

sqlcode: -902

sqlstate: 58005


Что означает, что, по мнению IBM, без support'а здесь не обойтись ;-(

Но может, просто диск посыпался или еще какая-то гадость.