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

Example 31 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 32 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 33 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));
}

Example 34 with Op

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

the class ApplyTransformVisitor method visit.

@Override
public void visit(OpLeftJoin op) {
    Op left = null;
    Op right = null;
    // Must do right-left because the pushes onto the stack were left-right.
    if (op.getRight() != null)
        right = pop(opStack);
    if (op.getLeft() != null)
        left = pop(opStack);
    ExprList exprs = op.getExprs();
    ExprList exprs2 = collect(exprs);
    OpLeftJoin x = op;
    if (exprs != exprs2)
        x = OpLeftJoin.createLeftJoin(left, right, exprs2);
    Op opX = x.apply(opTransform, left, right);
    push(opStack, opX);
}

Example 35 with Op

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

the class ApplyTransformVisitor method visitN.

@Override
public void visitN(OpN op) {
    List<Op> x = new ArrayList<>(op.size());
    for (Iterator<Op> iter = op.iterator(); iter.hasNext(); ) {
        Op sub = iter.next();
        Op r = pop(opStack);
        // Skip nulls.
        if (r != null)
            // Add in reverse.
            x.add(0, r);
    }
    Op opX = op.apply(opTransform, x);
    push(opStack, opX);
}