There are two built-in registered functions, lo_import
and lo_export
which are convenient for use in
SQL queries. Here is an
example of their use
CREATE TABLE image ( name text, raster oid ); INSERT INTO image (name, raster) VALUES ('beautiful image', lo_import('/etc/motd')); SELECT lo_export(image.raster, '/tmp/motd') FROM image WHERE name = 'beautiful image';