INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values (4121, 'EPSG', 4121, '+proj=longlat +ellps=GRS80 +towgs84=-199.87,74.79,246.62,0,0,0,0 +no_defs +type=crs', 'GEOGCS["GGRS87",DATUM["Greek_Geodetic_Reference_System_1987",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[-199.87,74.79,246.62,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4121"]]');