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CREATE EXTENSION lo;
CREATE TABLE image (title text, raster lo);
CREATE TRIGGER t_raster BEFORE UPDATE OR DELETE ON image
FOR EACH ROW EXECUTE PROCEDURE lo_manage(raster);
SELECT lo_create(43213);
SELECT lo_create(43214);
INSERT INTO image (title, raster) VALUES ('beautiful image', 43213);
SELECT lo_get(43213);
SELECT lo_get(43214);
UPDATE image SET raster = 43214 WHERE title = 'beautiful image';
SELECT lo_get(43213);
SELECT lo_get(43214);
DELETE FROM image;
SELECT lo_get(43214);
DROP TABLE image;
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