19    op.add_column(
'ps_endpoints', sa.Column(
'codec_prefs_incoming_offer', sa.String(max_value_length)))
 
   20    op.add_column(
'ps_endpoints', sa.Column(
'codec_prefs_outgoing_offer', sa.String(max_value_length)))
 
   21    op.add_column(
'ps_endpoints', sa.Column(
'codec_prefs_incoming_answer', sa.String(max_value_length)))
 
   22    op.add_column(
'ps_endpoints', sa.Column(
'codec_prefs_outgoing_answer', sa.String(max_value_length)))