rdfql_util:select_results/9

/srv/ClioPatria/rdfql/rdfql_util.pl

select_results(+Distinct, +Group, +Having, +Aggregates, +Offset, +Limit, +SortBy, -Result, :Goal) is nondet

Select results for the template Result on backtracking over Goal.

Arguments:

`Distinct`	- Iff 'distinct', only consider distinct solutions
`Group`	- is a list of variables on which to group the results. These are the only variables that can be used in the HAVING filter and final projection.
`Having`	- is a constraint (similar to `FILTER`) to filter grouped results.
`Aggregates`	- List of `aggregate(Function, Var)`
`Offset`	- Skip the first `Offset` results. `Offset` is applied after `Distinct` and `SortBy`
`Limit`	- Only return the first `Limit` results. `Limit` is applied after `Distinct`, `SortBy` and `Offset`. The value 'inf' returns all values.
`SortBy`	- Either 'unsorted' or a term `order_by(Cols)`, where each Col in Cols is a term `ascending(Expr)` or `descending(Expr)`.

To be done

- Group, Having and Aggregate are currently ignored.