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Oracle® Database SQL Reference
10g Release 1 (10.1)

Part Number B10759-01
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EMPTY_BLOB, EMPTY_CLOB


Syntax

empty_LOB::=
Description of empty_LOB.gif follows
Description of the illustration empty_LOB.gif


Purpose

EMPTY_BLOB and EMPTY_CLOB return an empty LOB locator that can be used to initialize a LOB variable or, in an INSERT or UPDATE statement, to initialize a LOB column or attribute to EMPTY. EMPTY means that the LOB is initialized, but not populated with data. You must initialize a LOB attribute that is part of an object type before you can access and populate it.


Restriction on LOB Locators

You cannot use the locator returned from this function as a parameter to the DBMS_LOB package or the OCI.


Examples

The following example initializes the ad_photo column of the sample pm.print_media table to EMPTY:

UPDATE print_media SET ad_photo = EMPTY_BLOB();