[RYA-260] Add Aggregation support for Fluo/PCJ app

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.2.10
• Assignee: Kevin Chilton
• Reporter: Andrew Smith
• Created: 09/Mar/17 19:26
• Updated: 24/Apr/17 15:07
• Resolved: 24/Apr/17 15:07

Description

A user must be able to submit a PCJ query that contains the following aggregation functions from SPARQL:

• Sum
• Count
• Average
• Min
• Max

This task does not include any aggregations that appear within a GroupBy clause. We only need to support queries that have the aggregation within the SELECT section.

For example, the following query should be processed:

SELECT (avg(?price) as ?averagePrice)
{
    urn:BookA urn:price ?price.
}

And the following query should not be processed because it requires a group by:

SELECT ?title (avg(?price) as ?averagePrice)
{
    ?title urn:price ?price.
}
GROUP BY ?title

Issue Links

• links to: GitHub Pull Request #156