BLOB, iBatis & PostgreSql 8.1

[tomasz brymora]

Greetings!

I got lost trying to save and read an image file from a db.

I get file upload taken care of where a servlet populates a bean with the image file and other info,
but I can't get to be written to the db.

What's the best way to procede, starting with the bean?

Would this be appropriate:

private MultipartFile imageBody;

Given the following table:

CREATE TABLE story_image 
(
image_name varying ( 30 ),
image_description varying (50),
image_body oid
);

... waht's the correct way to make the insert?
I'm using iBatis for handling the jdbc part of the app.

... partial iBatis sqlMap:

<insert id="saveImage" parameterClass="storyImage" >
    
    INSERT INTO images 
        (
            image_name,
            image_description,
            image_file
        )
        VALUES
        (   #imageName#,
            #imageDescription#,
            lo_import( #imageBody# )
        );
    
</insert>

... from what I gathered, pg uses a path to the image file for importing it, so should I store to a temp dir on
the server and feed pg the path to it?
Would the bean then require a String for the imageBody variable instead of the MultipartFile?

Am I using the datatype for this operation (oid)?

Before this I was able to store the image file in the db as 'bytea' but ran into problems trying to retrieve it:

INFO: Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml]
org.springframework.dao.DataIntegrityViolationExce ption: SqlMapClient operation; SQL [];
--- The error occurred in com/persistance/sqlmaps_xml/imagesSqlMap.xml.
--- The error occurred while applying a result map.
--- Check the getImageResult.
--- Check the result mapping for the 'imageBody' property.
--- Cause: org.postgresql.util.PSQLException: Bad value for type int : \377 ... rest omitted...


... so I'll appreciate any feedback you might have.