[JENA-1856] Unexpected results with GROUP_BY and GROUP_CONCAT

• Type: Question
• Status: Closed
• Priority: Major
• Resolution: Information Provided
• Affects Version/s: Jena 3.14.0
• Component/s: Jena
• Assignee: Andy Seaborne
• Reporter: Benjamin Geer
• Created: 09/Mar/20 11:19
• Updated: 09/Mar/20 15:06
• Resolved: 09/Mar/20 15:06

Description

Attached is:

• some example data
• a query that works as I expected, without GROUP BY
• the same query with GROUP BY and GROUP_CONCAT added, which doesn't work as I expected

Am I doing something wrong, or is this a bug?

Using the query without GROUP BY, I get these results as expected:

 

thing	decimal	boolean
<http://example.org/data/a>		<http://example.org/data/a/values/2>
<http://example.org/data/b>		<http://example.org/data/b/values/2>
<http://example.org/data/b>	<http://example.org/data/b/values/1>

 

Using the query with GROUP BY and GROUP_CONCAT, I expected to get:

thing	decimal__Concat	boolean__Concat
<http://example.org/data/a>		<http://example.org/data/a/values/2>
<http://example.org/data/b>	<http://example.org/data/b/values/1>	<http://example.org/data/b/values/2>

 

But instead I get:

thing	decimal__Concat	boolean__Concat
<http://example.org/data/a>		<http://example.org/data/a/values/2>
<http://example.org/data/b>

 

Should I be doing something different to get the results I expected?