[
https://issues.apache.org/jira/browse/JENA-1824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17021161#comment-17021161
]
Elie Roux commented on JENA-1824:
---------------------------------
Here's what happened in my mind: I thought there was an indication of an
assembler file in the content of a tdb directory, so I thought that by
providing --loc, tdbquery would look at that reference and open the assembler
file. I realize now that this is not the case and that there might not be a
reference to an assembler file in the content of a tdb directory, which may be
obvious to you but wasn't to me.
Re "--set tdb:unionDefaultGraph=true": right, that's a very useful command line
argument! Here's a patch to add it as an example to
https://jena.apache.org/documentation/tdb/optimizer.html
{noformat}
Any filter expression of a basic graph pattern is placed
immediately after all it's variables will be bound. Conjunctions at
the top level in filter expressions are broken into their
constituent pieces and placed separately.
## UnionGraph
If tdbquery is invoked with just the `--loc` argument on a
database that was created with UnionDefaultGraph, it will
need `--set tdb:unionDefaultGraph=true` to behave like it
does in Fuseki.
## Investigating what is going on
{noformat}
> documenting loc vs. tdb option in tdbquery
> ------------------------------------------
>
> Key: JENA-1824
> URL: https://issues.apache.org/jira/browse/JENA-1824
> Project: Apache Jena
> Issue Type: Improvement
> Components: Cmd line tools
> Affects Versions: Jena 3.14.0
> Reporter: Elie Roux
> Priority: Minor
>
> In tdbquery, the arguments loc and tdb are mutually exclusive, which can make
> the user think they're equivalent.
> But they're not: using the tdb argument gives many more indications to
> tdbquery, including the UnionGraph mechanism (which is otherwise impossible
> to convey in the command line).
> This should be made clear in the command line help message, and perhaps in
> the command line error message saying "Only one of an assembler file and a
> location".
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
