LONG, LONG RAW, and LOB Datatypes
LONG, LONG RAW, and LOB datatypes in triggers are subject to the following restrictions:
* A SQL statement within a trigger can insert data into a column of LONG or LONG RAW datatype.
* If data from a LONG or LONG RAW column can be converted to a constrained datatype (such as CHAR and VARCHAR2), then a LONG or LONG RAW column can be referenced in a SQL statement within a trigger. The maximum length for these datatypes is 32000 bytes.
* Variables cannot be declared using the LONG or LONG RAW datatypes.
* :NEW and : PARENT cannot be used with LONG or LONG RAW columns.
* LOB values for :NEW variables cannot be modified in the trigger body.
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