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

Example 91 with Op

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

the class QueryUtils method checkOp.

public static void checkOp(Query query, boolean optimizeAlgebra) {
    IndentedLineBuffer buff = new IndentedLineBuffer();
    Op op = Algebra.compile(query);
    if (optimizeAlgebra)
        op = Algebra.optimize(op);
    WriterSSE.out(buff, op, query);
    String str = buff.toString();
    try {
        Op op2 = SSE.parseOp(str);
        if (op.hashCode() != op2.hashCode()) {
            op.hashCode();
            op2.hashCode();
            dump(op, op2);
            throw new QueryCheckException("reparsed algebra expression hashCode does not equal algebra from query");
        }
        if (!op.equals(op2)) {
            dump(op, op2);
            throw new QueryCheckException("reparsed algebra expression does not equal query algebra");
        }
    } catch (SSEParseException | BuildException ex) {
        System.err.println(str);
        throw ex;
    }
// Breakpoint
}

Example 92 with Op

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

the class QueryOutputUtils method printOp.

public static void printOp(IndentedWriter out, Query query, boolean printOptimized) {
    Op op = Algebra.compile(query);
    if (printOptimized)
        op = Algebra.optimize(op);
    WriterSSE.out(out, op, query);
    out.flush();
}

Example 93 with Op

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

the class TestCustomAggregates method customAgg_22.

@Test
public void customAgg_22() {
    String qs = "SELECT (<" + aggIRI + ">(?o) AS ?x) {?s ?p ?o }";
    Query q = QueryFactory.create(qs, Syntax.syntaxARQ);
    Op op = Algebra.compile(q);
    String x = StrUtils.strjoinNL("(project (?x)", "   (extend ((?x ?.0))", "       (group () ((?.0 (agg <http://example.test/agg> ?o)))", "         (bgp (triple ?s ?p ?o)))))");
    Op op2 = SSE.parseOp(x);
    assertEquals(op2, op);
}

Example 94 with Op

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

the class tdbreorder method main.

public static void main(String... args) {
    if (args.length != 2) {
        System.err.println("Usage: PATTERN STATS");
        System.exit(1);
    }
    LogCtl.enable(StatsMatcher.class);
    LogCtl.enable(ReorderTransformationSubstitution.class);
    if (args.length != 2) {
        System.err.println("Usage: op stats");
        System.exit(1);
    }
    String pattern = args[0];
    String statsFile = args[1];
    Op op = SSE.readOp(pattern);
    BasicPattern bgp;
    if (op instanceof OpQuadPattern) {
        bgp = ((OpQuadPattern) op).getBasicPattern();
    } else if (op instanceof OpBGP) {
        bgp = ((OpBGP) op).getPattern();
    } else {
        System.err.println("Not a quad or triple pattern");
        System.exit(2);
        bgp = null;
    }
    ReorderTransformation reorder = chooseReorder(statsFile);
    // ReorderTransformation reorder = ReorderLib.fixed() ;
    BasicPattern bgp2 = reorder.reorder(bgp);
    System.out.println();
    print(bgp);
    System.out.println();
    System.out.println(" ======== >>>>>>>>");
    print(bgp2);
    System.out.println();
}

Example 95 with Op

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

the class OpExecutorTDB1 method optimizeExecuteTriples.

/** Execute, with optimization, a basic graph pattern on the default graph storage */
private static QueryIterator optimizeExecuteTriples(DatasetGraphTDB dsgtdb, QueryIterator input, BasicPattern pattern, ExprList exprs, ExecutionContext execCxt) {
    if (!input.hasNext())
        return input;
    // Must pass this iterator into the next stage.
    if (pattern.size() >= 2) {
        // Must be 2 or triples to reorder. 
        ReorderTransformation transform = dsgtdb.getReorderTransform();
        if (transform != null) {
            QueryIterPeek peek = QueryIterPeek.create(input, execCxt);
            // Must pass on
            input = peek;
            pattern = reorder(pattern, peek, transform);
        }
    }
    // -- Filter placement
    Op op = null;
    if (exprs != null)
        op = TransformFilterPlacement.transform(exprs, pattern);
    else
        op = new OpBGP(pattern);
    return plainExecute(op, input, execCxt);
}