Examples with RelSubset org.apache.calcite.plan.volcano.RelSubset used on opensource projects

Example 6 with RelSubset

use of org.apache.calcite.plan.volcano.RelSubset in project beam by apache.

the class BeamZetaSqlUnnestRule method onMatch.

@Override
public void onMatch(RelOptRuleCall call) {
    LogicalCorrelate correlate = call.rel(0);
    RelNode outer = call.rel(1);
    RelNode uncollect = call.rel(2);
    if (correlate.getRequiredColumns().cardinality() != 1) {
        // can only unnest a single column
        return;
    }
    if (correlate.getJoinType() != JoinRelType.INNER) {
        return;
    }
    if (!(uncollect instanceof ZetaSqlUnnest)) {
        // Drop projection
        uncollect = ((SingleRel) uncollect).getInput();
        if (uncollect instanceof RelSubset) {
            uncollect = ((RelSubset) uncollect).getOriginal();
        }
        if (!(uncollect instanceof ZetaSqlUnnest)) {
            return;
        }
    }
    RelNode project = ((ZetaSqlUnnest) uncollect).getInput();
    if (project instanceof RelSubset) {
        project = ((RelSubset) project).getOriginal();
    }
    if (!(project instanceof LogicalProject)) {
        return;
    }
    if (((LogicalProject) project).getProjects().size() != 1) {
        // can only unnest a single column
        return;
    }
    RexNode exp = ((LogicalProject) project).getProjects().get(0);
    if (!(exp instanceof RexFieldAccess)) {
        return;
    }
    RexFieldAccess fieldAccess = (RexFieldAccess) exp;
    // Innermost field index comes first (e.g. struct.field1.field2 => [2, 1])
    ImmutableList.Builder<Integer> fieldAccessIndices = ImmutableList.builder();
    while (true) {
        fieldAccessIndices.add(fieldAccess.getField().getIndex());
        if (!(fieldAccess.getReferenceExpr() instanceof RexFieldAccess)) {
            break;
        }
        fieldAccess = (RexFieldAccess) fieldAccess.getReferenceExpr();
    }
    call.transformTo(new BeamZetaSqlUnnestRel(correlate.getCluster(), correlate.getTraitSet().replace(BeamLogicalConvention.INSTANCE), convert(outer, outer.getTraitSet().replace(BeamLogicalConvention.INSTANCE)), call.rel(2).getRowType(), fieldAccessIndices.build()));
}

Example 7 with RelSubset

use of org.apache.calcite.plan.volcano.RelSubset in project beam by apache.

the class BeamBasicAggregationRule method hasWindowedParents.

private static boolean hasWindowedParents(RelNode node) {
    List<RelNode> parents = new ArrayList<>();
    for (RelNode inputNode : node.getInputs()) {
        if (inputNode instanceof RelSubset) {
            parents.addAll(((RelSubset) inputNode).getParentRels());
            parents.addAll(((RelSubset) inputNode).getRelList());
        }
    }
    for (RelNode parent : parents) {
        if (isWindowed(parent)) {
            return true;
        }
    }
    return false;
}

Example 8 with RelSubset

use of org.apache.calcite.plan.volcano.RelSubset in project hive by apache.

the class HiveVolcanoPlanner method getCost.

/**
 * The method extends the logic of the super method to decrease
 * the cost of the plan if it contains materialized views
 * (heuristic).
 */
public RelOptCost getCost(RelNode rel, RelMetadataQuery mq) {
    assert rel != null : "pre-condition: rel != null";
    if (rel instanceof RelSubset) {
        // Get cost of the subset, best rel may have been chosen or not
        RelSubset subset = (RelSubset) rel;
        if (subset.getBest() != null) {
            return getCost(subset.getBest(), mq);
        }
        return costFactory.makeInfiniteCost();
    }
    if (rel.getTraitSet().getTrait(ConventionTraitDef.INSTANCE) == Convention.NONE) {
        return costFactory.makeInfiniteCost();
    }
    // We get the cost of the operator
    RelOptCost cost = mq.getNonCumulativeCost(rel);
    if (!costFactory.makeZeroCost().isLt(cost)) {
        // cost must be positive, so nudge it
        cost = costFactory.makeTinyCost();
    }
    // If this operator has a materialized view below,
    // we make its cost tiny and adjust the cost of its
    // inputs
    boolean usesMaterializedViews = false;
    Multimap<Class<? extends RelNode>, RelNode> nodeTypes = mq.getNodeTypes(rel);
    for (RelNode scan : nodeTypes.get(TableScan.class)) {
        if (scan.getTable() instanceof RelOptHiveTable) {
            RelOptHiveTable relOptHiveTable = (RelOptHiveTable) scan.getTable();
            if (relOptHiveTable.getHiveTableMD().isMaterializedView()) {
                usesMaterializedViews = true;
                break;
            }
        }
    }
    if (isHeuristic && usesMaterializedViews) {
        // If a child of this expression uses a materialized view,
        // then we decrease its cost by a certain factor. This is
        // useful for e.g. partial rewritings, where a part of plan
        // does not use the materialization, but we still want to
        // decrease its cost so it is chosen instead of the original
        // plan
        cost = cost.multiplyBy(RelOptUtil.EPSILON);
        if (!costFactory.makeZeroCost().isLt(cost)) {
            // cost must be positive, so nudge it
            cost = costFactory.makeTinyCost();
        }
        for (RelNode input : rel.getInputs()) {
            cost = cost.plus(getCost(input, mq));
        }
    } else {
        // No materialized view or not heuristic approach, normal costing
        for (RelNode input : rel.getInputs()) {
            cost = cost.plus(getCost(input, mq));
        }
    }
    return cost;
}

Example 9 with RelSubset

use of org.apache.calcite.plan.volcano.RelSubset in project beam by apache.

the class NodeStatsTest method testSubsetHavingBest.

@Test
public void testSubsetHavingBest() {
    String sql = " select * from ORDER_DETAILS1 ";
    RelNode root = env.parseQuery(sql);
    root = root.getCluster().getPlanner().getRoot();
    // tests if we are actually testing what we want.
    Assert.assertTrue(root instanceof RelSubset);
    NodeStats estimates = BeamSqlRelUtils.getNodeStats(root, ((BeamRelMetadataQuery) root.getCluster().getMetadataQuery()));
    Assert.assertFalse(estimates.isUnknown());
}

Example 10 with RelSubset

use of org.apache.calcite.plan.volcano.RelSubset in project beam by apache.

the class BeamJoinRel method getBoundednessOfRelNode.

/**
 * This method returns the Boundedness of a RelNode. It is used during planning and applying
 * {@link org.apache.beam.sdk.extensions.sql.impl.rule.BeamCoGBKJoinRule} and {@link
 * org.apache.beam.sdk.extensions.sql.impl.rule.BeamSideInputJoinRule}
 *
 * <p>The Volcano planner works in a top-down fashion. It starts by transforming the root and move
 * towards the leafs of the plan. Due to this when transforming a logical join its inputs are
 * still in the logical convention. So, Recursively visit the inputs of the RelNode till
 * BeamIOSourceRel is encountered and propagate the boundedness upwards.
 *
 * <p>The Boundedness of each child of a RelNode is stored in a list. If any of the children are
 * Unbounded, the RelNode is Unbounded. Else, the RelNode is Bounded.
 *
 * @param relNode the RelNode whose Boundedness has to be determined
 * @return {@code PCollection.isBounded}
 */
public static PCollection.IsBounded getBoundednessOfRelNode(RelNode relNode) {
    if (relNode instanceof BeamRelNode) {
        return (((BeamRelNode) relNode).isBounded());
    }
    List<PCollection.IsBounded> boundednessOfInputs = new ArrayList<>();
    for (RelNode inputRel : relNode.getInputs()) {
        if (inputRel instanceof RelSubset) {
            // Consider the RelNode with best cost in the RelSubset. If best cost RelNode cannot be
            // determined, consider the first RelNode in the RelSubset
            RelNode rel = ((RelSubset) inputRel).getBest();
            if (rel == null) {
                rel = ((RelSubset) inputRel).getRelList().get(0);
            }
            boundednessOfInputs.add(getBoundednessOfRelNode(rel));
        } else {
            boundednessOfInputs.add(getBoundednessOfRelNode(inputRel));
        }
    }
    // If one of the input is Unbounded, the result is Unbounded.
    return (boundednessOfInputs.contains(PCollection.IsBounded.UNBOUNDED) ? PCollection.IsBounded.UNBOUNDED : PCollection.IsBounded.BOUNDED);
}