Oracle : Ошибка ORA-26748


"The one-to-one transformation function %s encountered the following error: %s"
*Cause: The specified transformation function encountered an error.
*Action: Ensure that the function does not return an LCR that has a
different type from the LCR which was passed to the function.
Also ensure that the function does not return NULL.
For DDL transformation functions, creating and returning a
new DDL LCR is not allowed.

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