オレオレDATUM、オレオレ投影

システムビューのWKT書き換えてみるかー。

insert into sys.spatial_reference_systems 
(spatial_reference_id, authority_name, authorized_spatial_reference_id, well_known_text)
 values (101101, 'EPSG', 101101,
  'GEOGCS["Tokyo", DATUM["Tokyo", ELLIPSOID["Bessel 1841", 6377397.155, 299.1528128]], PRIMEM["Greenwich", 0], UNIT["Degree", 0.0174532925199433]]');

結果の予想はついてるが、

VPCMCE(sa): Msg 259, Level 16, State 1, Line 1
Ad hoc updates to system catalogs are not allowed.

あえなく玉砕。