<h1>MuK Large Objects Field</h1> <p>PostgreSQL offers support for large objects, which provide stream-style access to user data that is stored in a special large-object structure. They are useful with data values too large to be manipulated conveniently as a whole.</p> <p>Psycopg allows access to the large object using the <code>lobject</code> class. Objects are generated using the <code>connection.lobject()</code> factory method. Data can be retrieved either as bytes or as Unicode strings.</p> <p>Psycopg large object support efficient import/export with file system files using the <code>lo_import()</code> and <code>lo_export()</code> libpq functions.</p> <p>Changed in version 2.6: added support for large objects greated than 2GB. Note that the support is enabled only if all the following conditions are verified:</p> <ul> <li>the Python build is 64 bits;</li> <li>the extension was built against at least libpq 9.3;</li> <li>the server version is at least PostgreSQL 9.3 (server_version must be &gt;= 90300).</li> </ul> <p>If Psycopg was built with 64 bits large objects support (i.e. the first two contidions above are verified), the <code>psycopg2.__version__</code> constant will contain the lo64 flag. If any of the contition is not met several lobject methods will fail if the arguments exceed 2GB.</p>