begin
   execute immediate 'drop materialized view ALL_IV_XFORM_MAP_TARGETS';
   execute immediate 'drop materialized view ALL_IV_XFORM_MAP_SOURCES';
   execute immediate 'drop view all_iv_xform_map_components3'; 
   execute immediate 'drop view all_iv_xform_map_parameters2';
   execute immediate 'drop view all_iv_xform_map_components2';
   execute immediate 'drop view ALL_IV_XFORM_MAP_PARAMETERS3';
   execute immediate 'drop view ALL_IV_XFORM_MAP_PARAMETERS4';
   execute immediate 'drop view ALL_IV_XFORM_MAP_PRIM_SOURCES';
   execute immediate 'drop view all_iv_operator_targets';
   execute immediate 'drop view all_iv_operator_sources';
   execute immediate 'drop view all_iv_operator_sources2';   
end;