Lee Kitching created JENA-1566:
----------------------------------
Summary: Unable to parse VALUES clause containing boolean literal
bindings
Key: JENA-1566
URL: https://issues.apache.org/jira/browse/JENA-1566
Project: Apache Jena
Issue Type: Bug
Components: ARQ
Affects Versions: Jena 3.7.0
Reporter: Lee Kitching
Compiling the query
{{SELECT ?b WHERE \{ VALUES ?b { true } }}}
into a query algebra:
{{Query q = QueryFactory.create("SELECT ?b WHERE \{ VALUES ?b { true } }");}}
{{Op a = Algebra.compile(q);}}
results in
{{(project}}
{{ (?b)}}
{{ (table}}
{{ (vars ?b)}}
{{ (row}}
{{ (?b true))))}}
Attempting to parse this string representation throws an exception:
{{SSE.parseOp("(project (?b) (table (vars ?b) (row (?b true))))");}}
{quote}
org.apache.jena.sparql.sse.builders.ExprBuildException "Not a node: true"
[org.apache.jena.sparql.sse.builders.BuilderLib exception "BuilderLib.java"
140]
[org.apache.jena.sparql.sse.builders.BuilderLib broken "BuilderLib.java"
147]
[org.apache.jena.sparql.sse.builders.BuilderLib broken "BuilderLib.java"
129]
[org.apache.jena.sparql.sse.builders.BuilderLib checkNode "BuilderLib.java"
32]
[org.apache.jena.sparql.sse.builders.BuilderBinding buildBinding
"BuilderBinding.java" 64]
[org.apache.jena.sparql.sse.builders.BuilderBinding build
"BuilderBinding.java" 36]
[org.apache.jena.sparql.sse.builders.BuilderTable build "BuilderTable.java"
73]
[org.apache.jena.sparql.sse.builders.BuilderOp$1 make "BuilderOp.java" 209]
[org.apache.jena.sparql.sse.builders.BuilderOp build "BuilderOp.java" 128]
[org.apache.jena.sparql.sse.builders.BuilderOp build "BuilderOp.java" 162]
[org.apache.jena.sparql.sse.builders.BuilderOp$26 make "BuilderOp.java" 672]
[org.apache.jena.sparql.sse.builders.BuilderOp build "BuilderOp.java" 128]
[org.apache.jena.sparql.sse.builders.BuilderOp build "BuilderOp.java" 59]
[org.apache.jena.sparql.algebra.Algebra parse "Algebra.java" 121]
[org.apache.jena.sparql.algebra.Algebra parse "Algebra.java" 109]
[org.apache.jena.sparql.sse.SSE parseOp "SSE.java" 287]
{quote}
As a bit of background, we are trying to rewrite SPARQL queries using ARQ in
Clojure (as described in
[JENA-1468|https://issues.apache.org/jira/browse/JENA-1468]). The current
process is:
Parse SPARQL query -> Compile to Op -> serialise to string -> parse as SSE ->
modify SSE -> serialise to string -> Parse to Op -> convert to SPARQL query
This issue is causing the 'parse as SSE' step to fail.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
