Rupert Westenthaler created STANBOL-1204:
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Summary: Entityhub SPARQL query util builds invalid FILTER for
TextConstraints with multiple OR values and language parameter(s)
Key: STANBOL-1204
URL: https://issues.apache.org/jira/browse/STANBOL-1204
Project: Stanbol
Issue Type: Bug
Reporter: Rupert Westenthaler
Assignee: Rupert Westenthaler
Fix For: 0.12.0
The ongoing work on STANBOL-1202 revealed a bug related to TextConstraints as
follows
FieldQuery query = yard.getQueryFactory().createFieldQuery();
query.setConstraint(field, new TextConstraint(
Arrays.asList("value1", "value2"), "en"));
The SPARQL query util will encode such a constraint in SPARQL such as
SELECT [..]
WHERE {
?id <urn:yard.test:find:field.text> ?v_1
FILTER(regex(str(?v_1),"^value1$","i") ||
regex(str(?v_1),"^value2$","i") && (lang(?v_1) = "en")) .
}
The FILTER part is wrong is it will apply the `(lang(?v_1) = "en"))` is only
applied for "value2" while "value1" is accepted for any lanugage.
The correct FILTER part would need to group all regex parts with an additional
bracket before combining it with the language restriction.
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