ORA-22927: invalid LOB locator specified

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ORA-22927: invalid LOB locator specified
Cause: There are severalcauses: (1) the LOB locator was never initialized; (2) the
locator is for a BFILE and the routine expects a BLOB/CLOB/NCLOB locator; (3)
the locator is for a BLOB/CLOB/NCLOB and the routine expects a BFILE locator;
(4) trying to update the LOB in a trigger body -- LOBs in trigger bodies areread
only.
Action: For (1), initializethe LOB locator by selecting into the locator variable or
by setting the LOB locator to empty. For (2) and (3), pass the correct type oflocator
into the routine. For (4), remove the trigger body code that updates the LOBvalue.