Add a name or namespace preorder record, if it doesn't exist already.

    DO NOT CALL THIS DIRECTLY.

def namedb_preorder_insert( cur, preorder_rec ):
    """
    Add a name or namespace preorder record, if it doesn't exist already.

    DO NOT CALL THIS DIRECTLY.
    """

    preorder_row = copy.deepcopy( preorder_rec )
    
    assert 'preorder_hash' in preorder_row, "BUG: missing preorder_hash"

    try:
        preorder_query, preorder_values = namedb_insert_prepare( cur, preorder_row, "preorders" )
    except Exception, e:
        log.exception(e)
        log.error("FATAL: Failed to insert name preorder '%s'" % preorder_row['preorder_hash']) 
        os.abort()

    namedb_query_execute( cur, preorder_query, preorder_values )
    return True