Examples with Op org.apache.jena.sparql.algebra.Op used on opensource projects

Example 1 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class TransformSliceProject method transform.

@Override
public Op transform(OpSlice opSlice, Op subOp) {
    // (slice (project...)) ==> (project (slice ...))
    if (subOp instanceof OpProject) {
        OpProject p = (OpProject) subOp;
        Op sub = p.getSubOp();
        Op x = new OpSlice(sub, opSlice.getStart(), opSlice.getLength());
        x = new OpProject(x, p.getVars());
        return x;
    }
    return super.transform(opSlice, subOp);
}

Example 2 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class QueryIterOpSQL method nextStage.

@Override
protected QueryIterator nextStage(Binding binding) {
    OpSQL execSQL = this.opSQL;
    if (binding != null && !isRoot(binding)) {
        QueryCompiler qc = opSQL.getRequest().getStore().getQueryCompilerFactory().createQueryCompiler(request);
        Op op2 = Substitute.substitute(opSQL.getOriginal(), binding);
        Op op = qc.compile(op2);
        if (op instanceof OpSQL)
            execSQL = (OpSQL) op;
        else
            throw new SDBInternalError("Failed to recompile the OpSQL to an OpSQL");
    }
    return execSQL.exec(binding, getExecContext());
//        QueryIterator qIter = execSQL.exec(binding, getExecContext()) ;
//        List<Binding> x = Iter.toList(qIter) ;
//        qIter = new QueryIterPlainWrapper(x.iterator(), getExecContext()) ;
//        System.out.println("SQL Eval:") ;
//        x.forEach(b -> System.out.println("  "+b) );
//        System.out.println() ;
//        return qIter ;
}

Example 3 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class QueryValidator method outputAlgebra.

private void outputAlgebra(ServletOutputStream outStream, final Query query, boolean lineNumbers) throws IOException {
    outStream.println("<p>Algebra structure:</p>");
    // No optimization
    final Op op = Algebra.compile(query);
    output(outStream, query, op, lineNumbers);
}

Example 4 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class sdbprint method compilePrint.

private void compilePrint(Store store, Query query) {
    SDB.getContext().setIfUndef(SDB.annotateGeneratedSQL, true);
    if (!printQuery && !printOp && !printSqlNode && !printSQL && !printPlan)
        printSQL = true;
    if (isVerbose()) {
        //printQuery = true ;
        printOp = true;
        //printSqlNode = true ;
        printSQL = true;
    }
    if (printQuery) {
        divider();
        query.serialize(System.out, Syntax.syntaxARQ);
    }
    QueryEngineSDB qe = new QueryEngineSDB(store, query);
    Op op = qe.getOp();
    if (printOp) {
        divider();
        PrintSDB.print(op);
    // No newline.
    }
    if (printSqlNode) {
        divider();
        PrintSDB.printSqlNodes(op);
    }
    if (printSQL) {
        divider();
        PrintSDB.printSQL(op);
    }
    if (printPlan) {
        divider();
        System.out.print(qe.getPlan());
    }
}

Example 5 with Op

use of org.apache.jena.sparql.algebra.Op in project jena by apache.

the class TestSolverTDB method exec.

private static ResultSet exec(String pattern, Graph graph) {
    Op op = SSE.parseOp(pattern, pmap);
    List<Var> vars = new ArrayList<>();
    vars.addAll(OpVars.visibleVars(op));
    QueryIterator qIter = Algebra.exec(op, graph);
    return ResultSetFactory.create(qIter, Var.varNames(vars));
}