Checking whether data exists in a BLOB type database column in Forms 6i

I am developing an application regarding inventory of a plant's spare parts. I am storing photo (.bmp) of spares in the database in a column of BLOB type. Once user punches spare's code, form displays spares data on screen using EXECUTE_QUERY. At this stage I want to check whether picture (.bmp) data was found in BLOB type database column or not. I want to take action accordingly. How to check this. If it would be a numeric column, I would have checked NULL but NULL does not work with BLOB type coloumns.
Pl. help.
Thanks in anticipation.

Did you look in the database documentation? The DBMS_LOB package has the method you need: getlength().
This was more of a database question than a Forms question, so you'd probably have more luck with these types of questions on one of the other forums, like the database or SQL forums.
Regards,
Robin Zimmermann
Forms Product Management

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Checking whether data exists in a BLOB type database column in Forms 6i

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