[postgis-users] Mulitple Geometry Columns in One Table

[Steffen Macke]

Hello All,

previously (up to PostGIS 0.8.0), it was possible to have
more than one geometry column in a table. With the current CVS
version this is impossible (postgis.sql.in version 1.74).

AddGeometryColumn() fails reporting an error that the constraint 
"enforce_srid"
already exists.

After commenting out the following 4 lines in AddGeometryColumn(),
adding a second geometry column works again:

EXECUTE 'ALTER TABLE ' ||

     quote_ident(real_schema) || '.' || quote_ident(table_name)

         || ' ADD CONSTRAINT enforce_srid CHECK (SRID(' || 
quote_ident(column_name) ||
         ') = ' || new_srid || ')' ;

Is it possible to check for existence of the constraint before? Or does 
it make more sense
to include the geometry column name in the constraint name (e.g. 
enforce_shape_srid)?

Regards,

Steffen