Oracle : Ошибка ORA-10979

"trace flags for join index implementation"
*Cause: This is an informational message.
*Action: Values are as follows:
> 1 Dump refresh expressions (SQL) to trace file.
> 999 If a complete refresh is invoked, it will not be performed
but the system will assume that a complete refresh was done,
causing the view to be VALID and updating timestamps. This
should be used only under Oracle Support supervision.

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