[postgis-users] Difference on check constraints on colum type between Pgis 1.5 and 2.0 ?

[David PEYRIERES]

Hye. 
I have a question about the check constraints on the PostGIS columns type 
Can you explain me why we got check constraints on old version (here 1.5.2) of PostGIS and now we don't see such constraints with 2.0 when we ask a describe of such relation. 
I precise that the 2 objects have been created with same query (same function) on two servers. 

>>> select AddGeometryColumn('d1','contour',4326,'MULTIPOLYGON',2); 

POSTGIS 1.5 
___________________ 
bd=> \d d1 
Column | Type | Modifiers 
----------+----------+----------- 
idmenage | integer | not null 
contour | geometry | 
Indexes: 
"idx1_d1" btree (idmenage), tablespace "bde_data" 
Check constraints: 
"enforce_dims_contour" CHECK (st_ndims(contour) = 2) 
"enforce_geotype_contour" CHECK (geometrytype(contour) = 'MULTIPOLYGON'::text OR contour IS NULL) 
"enforce_srid_contour" CHECK (st_srid(contour) = 4326) 


POSTGIS 2.0 
___________________ 
bde=> \d d1 
Column | Type | Modifiers 
----------+-----------------------------+----------- 
idmenage | integer | not null 
contour | geometry(MultiPolygon,4326) | 
Indexes: 
"idx1_d1" btree (idmenage) 


The difference is that the type added by function is not really the same. 
Are constraints not visible but internal ? 
Thanks. 




David PEYRIERES 
Direction des Sytèmes d'Information 
Division Etudes et Développements 
Administration et Support Bases de Données 


Tel : +33 (0)5.61.07.83.36 
Fax : +33 (0)5.61.07.81.09 
david.peyrieres at meteo.fr 


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