Examples with SplitManager com.facebook.presto.split.SplitManager used on opensource projects

Example 1 with SplitManager

use of com.facebook.presto.split.SplitManager in project presto by prestodb.

the class ExtractSpatialJoins method loadKdbTree.

private static KdbTree loadKdbTree(String tableName, Session session, Metadata metadata, SplitManager splitManager, PageSourceManager pageSourceManager) {
    QualifiedObjectName name = toQualifiedObjectName(tableName, session.getCatalog().get(), session.getSchema().get());
    TableHandle tableHandle = metadata.getTableHandle(session, name).orElseThrow(() -> new PrestoException(INVALID_SPATIAL_PARTITIONING, format("Table not found: %s", name)));
    Map<String, ColumnHandle> columnHandles = metadata.getColumnHandles(session, tableHandle);
    List<ColumnHandle> visibleColumnHandles = columnHandles.values().stream().filter(handle -> !metadata.getColumnMetadata(session, tableHandle, handle).isHidden()).collect(toImmutableList());
    checkSpatialPartitioningTable(visibleColumnHandles.size() == 1, "Expected single column for table %s, but found %s columns", name, columnHandles.size());
    ColumnHandle kdbTreeColumn = Iterables.getOnlyElement(visibleColumnHandles);
    TableLayoutResult layout = metadata.getLayout(session, tableHandle, Constraint.alwaysTrue(), Optional.of(ImmutableSet.of(kdbTreeColumn)));
    TableHandle newTableHandle = layout.getLayout().getNewTableHandle();
    Optional<KdbTree> kdbTree = Optional.empty();
    try (SplitSource splitSource = splitManager.getSplits(session, newTableHandle, UNGROUPED_SCHEDULING, WarningCollector.NOOP)) {
        while (!Thread.currentThread().isInterrupted()) {
            SplitBatch splitBatch = getFutureValue(splitSource.getNextBatch(NOT_PARTITIONED, Lifespan.taskWide(), 1000));
            List<Split> splits = splitBatch.getSplits();
            for (Split split : splits) {
                try (ConnectorPageSource pageSource = pageSourceManager.createPageSource(session, split, newTableHandle, ImmutableList.of(kdbTreeColumn))) {
                    do {
                        getFutureValue(pageSource.isBlocked());
                        Page page = pageSource.getNextPage();
                        if (page != null && page.getPositionCount() > 0) {
                            checkSpatialPartitioningTable(!kdbTree.isPresent(), "Expected exactly one row for table %s, but found more", name);
                            checkSpatialPartitioningTable(page.getPositionCount() == 1, "Expected exactly one row for table %s, but found %s rows", name, page.getPositionCount());
                            String kdbTreeJson = VARCHAR.getSlice(page.getBlock(0), 0).toStringUtf8();
                            try {
                                kdbTree = Optional.of(KdbTreeUtils.fromJson(kdbTreeJson));
                            } catch (IllegalArgumentException e) {
                                checkSpatialPartitioningTable(false, "Invalid JSON string for KDB tree: %s", e.getMessage());
                            }
                        }
                    } while (!pageSource.isFinished());
                } catch (IOException e) {
                    throw new UncheckedIOException(e);
                }
            }
            if (splitBatch.isLastBatch()) {
                break;
            }
        }
    }
    checkSpatialPartitioningTable(kdbTree.isPresent(), "Expected exactly one row for table %s, but got none", name);
    return kdbTree.get();
}

Example 2 with SplitManager

use of com.facebook.presto.split.SplitManager in project presto by prestodb.

the class ExtractSpatialJoins method tryCreateSpatialJoin.

private static Result tryCreateSpatialJoin(Context context, JoinNode joinNode, RowExpression filter, PlanNodeId nodeId, List<VariableReferenceExpression> outputVariables, CallExpression spatialComparison, Metadata metadata, SplitManager splitManager, PageSourceManager pageSourceManager) {
    FunctionMetadata spatialComparisonMetadata = metadata.getFunctionAndTypeManager().getFunctionMetadata(spatialComparison.getFunctionHandle());
    checkArgument(spatialComparison.getArguments().size() == 2 && spatialComparisonMetadata.getOperatorType().isPresent());
    PlanNode leftNode = joinNode.getLeft();
    PlanNode rightNode = joinNode.getRight();
    List<VariableReferenceExpression> leftVariables = leftNode.getOutputVariables();
    List<VariableReferenceExpression> rightVariables = rightNode.getOutputVariables();
    RowExpression radius;
    Optional<VariableReferenceExpression> newRadiusVariable;
    CallExpression newComparison;
    if (spatialComparisonMetadata.getOperatorType().get() == OperatorType.LESS_THAN || spatialComparisonMetadata.getOperatorType().get() == OperatorType.LESS_THAN_OR_EQUAL) {
        // ST_Distance(a, b) <= r
        radius = spatialComparison.getArguments().get(1);
        Set<VariableReferenceExpression> radiusVariables = extractUnique(radius);
        if (radiusVariables.isEmpty() || (rightVariables.containsAll(radiusVariables) && containsNone(leftVariables, radiusVariables))) {
            newRadiusVariable = newRadiusVariable(context, radius);
            newComparison = new CallExpression(spatialComparison.getSourceLocation(), spatialComparison.getDisplayName(), spatialComparison.getFunctionHandle(), spatialComparison.getType(), ImmutableList.of(spatialComparison.getArguments().get(0), mapToExpression(newRadiusVariable, radius)));
        } else {
            return Result.empty();
        }
    } else {
        // r >= ST_Distance(a, b)
        radius = spatialComparison.getArguments().get(0);
        Set<VariableReferenceExpression> radiusVariables = extractUnique(radius);
        if (radiusVariables.isEmpty() || (rightVariables.containsAll(radiusVariables) && containsNone(leftVariables, radiusVariables))) {
            newRadiusVariable = newRadiusVariable(context, radius);
            OperatorType flippedOperatorType = flip(spatialComparisonMetadata.getOperatorType().get());
            FunctionHandle flippedHandle = getFlippedFunctionHandle(spatialComparison, metadata.getFunctionAndTypeManager());
            newComparison = new CallExpression(spatialComparison.getSourceLocation(), // TODO verify if this is the correct function displayName
            flippedOperatorType.getOperator(), flippedHandle, spatialComparison.getType(), ImmutableList.of(spatialComparison.getArguments().get(1), mapToExpression(newRadiusVariable, radius)));
        } else {
            return Result.empty();
        }
    }
    RowExpression newFilter = replaceExpression(filter, ImmutableMap.of(spatialComparison, newComparison));
    PlanNode newRightNode = newRadiusVariable.map(variable -> addProjection(context, rightNode, variable, radius)).orElse(rightNode);
    JoinNode newJoinNode = new JoinNode(joinNode.getSourceLocation(), joinNode.getId(), joinNode.getType(), leftNode, newRightNode, joinNode.getCriteria(), joinNode.getOutputVariables(), Optional.of(newFilter), joinNode.getLeftHashVariable(), joinNode.getRightHashVariable(), joinNode.getDistributionType(), joinNode.getDynamicFilters());
    return tryCreateSpatialJoin(context, newJoinNode, newFilter, nodeId, outputVariables, (CallExpression) newComparison.getArguments().get(0), Optional.of(newComparison.getArguments().get(1)), metadata, splitManager, pageSourceManager);
}

Example 3 with SplitManager

use of com.facebook.presto.split.SplitManager in project presto by prestodb.

the class ExtractSpatialJoins method tryCreateSpatialJoin.

private static Result tryCreateSpatialJoin(Context context, JoinNode joinNode, RowExpression filter, PlanNodeId nodeId, List<VariableReferenceExpression> outputVariables, CallExpression spatialFunction, Optional<RowExpression> radius, Metadata metadata, SplitManager splitManager, PageSourceManager pageSourceManager) {
    FunctionAndTypeManager functionAndTypeManager = metadata.getFunctionAndTypeManager();
    List<RowExpression> arguments = spatialFunction.getArguments();
    verify(arguments.size() == 2);
    RowExpression firstArgument = arguments.get(0);
    RowExpression secondArgument = arguments.get(1);
    // Currently, only inner joins are supported for spherical geometries.
    if (joinNode.getType() != INNER && isSphericalJoin(metadata, firstArgument, secondArgument)) {
        return Result.empty();
    }
    Set<VariableReferenceExpression> firstVariables = extractUnique(firstArgument);
    Set<VariableReferenceExpression> secondVariables = extractUnique(secondArgument);
    if (firstVariables.isEmpty() || secondVariables.isEmpty()) {
        return Result.empty();
    }
    // If either firstArgument or secondArgument is not a
    // VariableReferenceExpression, will replace the left/right join node
    // with a projection that adds the argument as a variable.
    Optional<VariableReferenceExpression> newFirstVariable = newGeometryVariable(context, firstArgument);
    Optional<VariableReferenceExpression> newSecondVariable = newGeometryVariable(context, secondArgument);
    PlanNode leftNode = joinNode.getLeft();
    PlanNode rightNode = joinNode.getRight();
    PlanNode newLeftNode;
    PlanNode newRightNode;
    // Check if the order of arguments of the spatial function matches the order of join sides
    int alignment = checkAlignment(joinNode, firstVariables, secondVariables);
    if (alignment > 0) {
        newLeftNode = newFirstVariable.map(variable -> addProjection(context, leftNode, variable, firstArgument)).orElse(leftNode);
        newRightNode = newSecondVariable.map(variable -> addProjection(context, rightNode, variable, secondArgument)).orElse(rightNode);
    } else if (alignment < 0) {
        newLeftNode = newSecondVariable.map(variable -> addProjection(context, leftNode, variable, secondArgument)).orElse(leftNode);
        newRightNode = newFirstVariable.map(variable -> addProjection(context, rightNode, variable, firstArgument)).orElse(rightNode);
    } else {
        return Result.empty();
    }
    RowExpression newFirstArgument = mapToExpression(newFirstVariable, firstArgument);
    RowExpression newSecondArgument = mapToExpression(newSecondVariable, secondArgument);
    // Implement partitioned spatial joins:
    // If the session parameter points to a valid spatial partitioning, use
    // that to assign to each probe and build rows the partitions that the
    // geometry intersects.  This is a projection that adds an array of ints
    // which is subsequently unnested.
    Optional<String> spatialPartitioningTableName = canPartitionSpatialJoin(joinNode) ? getSpatialPartitioningTableName(context.getSession()) : Optional.empty();
    Optional<KdbTree> kdbTree = spatialPartitioningTableName.map(tableName -> loadKdbTree(tableName, context.getSession(), metadata, splitManager, pageSourceManager));
    Optional<VariableReferenceExpression> leftPartitionVariable = Optional.empty();
    Optional<VariableReferenceExpression> rightPartitionVariable = Optional.empty();
    if (kdbTree.isPresent()) {
        leftPartitionVariable = Optional.of(context.getVariableAllocator().newVariable(newFirstArgument.getSourceLocation(), "pid", INTEGER));
        rightPartitionVariable = Optional.of(context.getVariableAllocator().newVariable(newSecondArgument.getSourceLocation(), "pid", INTEGER));
        if (alignment > 0) {
            newLeftNode = addPartitioningNodes(context, functionAndTypeManager, newLeftNode, leftPartitionVariable.get(), kdbTree.get(), newFirstArgument, Optional.empty());
            newRightNode = addPartitioningNodes(context, functionAndTypeManager, newRightNode, rightPartitionVariable.get(), kdbTree.get(), newSecondArgument, radius);
        } else {
            newLeftNode = addPartitioningNodes(context, functionAndTypeManager, newLeftNode, leftPartitionVariable.get(), kdbTree.get(), newSecondArgument, Optional.empty());
            newRightNode = addPartitioningNodes(context, functionAndTypeManager, newRightNode, rightPartitionVariable.get(), kdbTree.get(), newFirstArgument, radius);
        }
    }
    CallExpression newSpatialFunction = new CallExpression(spatialFunction.getSourceLocation(), spatialFunction.getDisplayName(), spatialFunction.getFunctionHandle(), spatialFunction.getType(), ImmutableList.of(newFirstArgument, newSecondArgument));
    RowExpression newFilter = RowExpressionNodeInliner.replaceExpression(filter, ImmutableMap.of(spatialFunction, newSpatialFunction));
    return Result.ofPlanNode(new SpatialJoinNode(joinNode.getSourceLocation(), nodeId, SpatialJoinNode.Type.fromJoinNodeType(joinNode.getType()), newLeftNode, newRightNode, outputVariables, newFilter, leftPartitionVariable, rightPartitionVariable, kdbTree.map(KdbTreeUtils::toJson)));
}