[
https://issues.apache.org/jira/browse/JENA-771?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rob Vesse updated JENA-771:
---------------------------
Description:
We ran into a strange case where {{TransformExpandOneOf}} doesn't appear to get
applied properly.
Consider the following query:
{noformat}
SELECT ?x
WHERE
{
FILTER(true)
{
SELECT ?x
WHERE
{
FILTER (?x NOT IN (1, 2, 3))
}
}
}
{noformat}
Which produces the following algebra:
{noformat}
(project (?x)
(project (?x)
(filter (exprlist true (notin ?x 1 2 3))
(table unit))))
{noformat}
Note that the {{NOT IN}} was left in the expression form rather than being
expanded to the equivalent {{!=}} expressions.
If the first {{FILTER}} line is commented out then the following algebra is
produced:
{noformat}
(project (?x)
(project (?x)
(filter (exprlist (!= ?x 1) (!= ?x 2) (!= ?x 3))
(table unit))))
{noformat}
So it looks like there is something going on that somehow blocks
{{TransformExpandOneOf}} from working when another filter is present in the
outer query. Possibly this is something related to filter placement?
This problem occurs as far back as 2.11.1 and can be reproduced with 2.11.2,
2.12.0 and current trunk. It does not appear in 2.11.0 so must have been
introduced in 2.11.1
was:
We ran into a strange case where {{TransformExpandOneOf}} doesn't appear to get
applied properly.
Consider the following query:
{noformat}
SELECT ?x
WHERE
{
FILTER(true)
{
SELECT ?x
WHERE
{
FILTER (?x NOT IN (1, 2, 3))
}
}
}
{noformat}
Which produces the following algebra:
{noformat}
(project (?x)
(project (?x)
(filter (exprlist true (notin ?x 1 2 3))
(table unit))))
{noformat}
Note that the {{NOT IN}} was left in the expression form rather than being
expanded to the equivalent {{!=}} expressions.
If the first {{FILTER}} line is commented out then the following algebra is
produced:
{noformat}
(project (?x)
(project (?x)
(filter (exprlist (!= ?x 1) (!= ?x 2) (!= ?x 3))
(table unit))))
{noformat}
So it looks like there is something going on that somehow blocks
{{TransformExpandOneOf}} from working when another filter is in the same scope.
Possibly something related to filter placement?
This problem occurs as far back as 2.11.1 and can be reproduced with current
trunk, it does not appear in 2.11.0 so must have been introduced in 2.11.1
> TransformExpandOneOf is not applied as expected
> -----------------------------------------------
>
> Key: JENA-771
> URL: https://issues.apache.org/jira/browse/JENA-771
> Project: Apache Jena
> Issue Type: Bug
> Components: ARQ
> Affects Versions: Jena 2.12.0
> Reporter: Rob Vesse
> Labels: optimizer, sparql
>
> We ran into a strange case where {{TransformExpandOneOf}} doesn't appear to
> get applied properly.
> Consider the following query:
> {noformat}
> SELECT ?x
> WHERE
> {
> FILTER(true)
> {
> SELECT ?x
> WHERE
> {
> FILTER (?x NOT IN (1, 2, 3))
> }
> }
> }
> {noformat}
> Which produces the following algebra:
> {noformat}
> (project (?x)
> (project (?x)
> (filter (exprlist true (notin ?x 1 2 3))
> (table unit))))
> {noformat}
> Note that the {{NOT IN}} was left in the expression form rather than being
> expanded to the equivalent {{!=}} expressions.
> If the first {{FILTER}} line is commented out then the following algebra is
> produced:
> {noformat}
> (project (?x)
> (project (?x)
> (filter (exprlist (!= ?x 1) (!= ?x 2) (!= ?x 3))
> (table unit))))
> {noformat}
> So it looks like there is something going on that somehow blocks
> {{TransformExpandOneOf}} from working when another filter is present in the
> outer query. Possibly this is something related to filter placement?
> This problem occurs as far back as 2.11.1 and can be reproduced with 2.11.2,
> 2.12.0 and current trunk. It does not appear in 2.11.0 so must have been
> introduced in 2.11.1
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