Open gpeb2 opened 2 years ago
This index (for efficiency reasons) should be numeric and used to generate the iri which should also contain a unique table identifier. If the index is a string you can use the sql function hastext
to generate a numeric one.
When uploading data to PostGIS through the stack-data-uploader it would be very beneficial to be able to specify columns that should be indexed as indices can massively speed up certain SQL queries and therefore SPARQL queries made through Ontop.