[postgis] without islossy

[mj_vermeij]

Sorry, simple question here,

Is it allowed to create an indexing whilst ommitting the 
'with (ISLOSSY)' statement?

example

create index boundary_0b on boundary 
using GIST (shape GIST_GEOMETRY_OPS);

with shape created by:

SELECT AddGeometryColumn ('lki5','boundary','shape',-
1,'LINESTRING',2);

I did this and got no error messages, but I can't get PostgreSQL to do

select count (*) from boundary where truly_inside ( GeometryFromText
('POLYGON ((78550000 457900000,78550000 458025000,78650000 
458025000,78650000 457900000,78550000 457900000))' ,-1 ) , bbox );

without using a Seq Scan even with 'set enable_seqscan=off;'. Or is 
this correct?





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