qmj0923 opened a new issue, #3040:
URL: https://github.com/apache/jena/issues/3040
### Version
4.10.0
### Question
I am using the following code to transform variables in the query:
```java
package test.example;
import org.apache.jena.query.Query;
import org.apache.jena.query.QueryFactory;
import org.apache.jena.query.Syntax;
import org.apache.jena.sparql.core.Var;
import org.apache.jena.sparql.syntax.syntaxtransform.QueryTransformOps;
import java.util.HashMap;
import java.util.Map;
public class Main {
public static void main(String[] args) {
String queryString = """
PREFIX : <http://example/>
SELECT ?a WHERE {
VALUES ?a { :q }
BIND (?a AS ?b)
?a ?c ?d.
}
""";
Query query = QueryFactory.create(queryString,
Syntax.syntaxSPARQL_11);
// System.out.println(query);
Map<Var, Var> varMap = new HashMap<>();
varMap.put(Var.alloc("a"), Var.alloc("newA"));
Query newQuery = QueryTransformOps.transform(query, varMap);
System.out.println(newQuery);
}
}
```
And the output is as follows:
```
SELECT ?newA
WHERE
{ VALUES ?a { :q }
BIND(?newA AS ?b)
?newA ?c ?d
}
```
I wonder why the `?a` in the VALUES clause is not replaced with `?newA`. I
find that it relates to this code:
https://github.com/apache/jena/blob/a3983b2a6d26c5dc7d849b7d5f2f550f9d607eb3/jena-arq/src/main/java/org/apache/jena/sparql/syntax/syntaxtransform/ApplyElementTransformVisitor.java#L114-L118
In the code, `((ElementTransformSubst) transform)` calls
`ElementTransformCopyBase.transform(ElementData el)`, so the substitution never
happens. Am I right?
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