PostGIS 1.5.8 Manual - Fedora Project Packages GIT repositories

PostGIS 1.5.8 Manual245 / 310SELECT ST_AsEWKT(ST_AddMeasure(ST_GeomFromEWKT(’LINESTRINGM(1 0 4, 2 0 4, 4 0 4)’),10,40)) As ewelev;ewelev----------------------------------------LINESTRINGM(1 0 10,2 0 20,4 0 40)SELECT ST_AsEWKT(ST_AddMeasure(ST_GeomFromEWKT(’MULTILINESTRINGM((1 0 4, 2 0 4, 4 0 4),(1 0 4, 2 0 4, 4 0 4))’),10,70)) As ←↪ewelev;ewelev-----------------------------------------------------------------MULTILINESTRINGM((1 0 10,2 0 20,4 0 40),(1 0 40,2 0 50,4 0 70))7.11 Long Transactions SupportThis module and associated pl/pgsql functions have been implemented to provide long locking support required by Web FeatureService specification.NoteUsers must use serializable transaction level otherwise locking mechanism would break.7.11.1 AddAuthAddAuth — Add an authorization token to be used in current transaction.Synopsisboolean AddAuth(text auth_token);DescriptionAdd an authorization token to be used in current transaction.Creates/adds to a temp table called temp_lock_have_table the current transaction identifier and authorization token key.Availability: 1.1.3ExamplesSELECT LockRow(’towns’, ’353’, ’priscilla’);BEGIN TRANSACTION;SELECT AddAuth(’joey’);UPDATE towns SET the_geom = ST_Translate(the_geom,2,2) WHERE gid = 353;COMMIT;---Error--ERROR: UPDATE where "gid" = ’353’ requires authorization ’priscilla’