pg_lo_export
Name
pg_lo_export -- export a large object to a file
Synopsis
pg_lo_export conn loid filename
Description
   pg_lo_export writes the specified large object
   into a file.
  
Arguments
- conn
-       The handle of a connection to the database in which the large object
      exists.
      
- loid
-       The OID of the large object.
      
- filename
-       Specifies the file into which the data is to be exported.
      
Notes
   pg_lo_export must be called within a
   BEGIN/COMMIT transaction block.