Examples with CallExpression com.facebook.presto.spi.relation.CallExpression used on opensource projects

Example 56 with CallExpression

use of com.facebook.presto.spi.relation.CallExpression in project presto by prestodb.

the class QueryPlanner method window.

private PlanBuilder window(PlanBuilder subPlan, List<FunctionCall> windowFunctions) {
    if (windowFunctions.isEmpty()) {
        return subPlan;
    }
    for (FunctionCall windowFunction : windowFunctions) {
        Window window = windowFunction.getWindow().get();
        // Extract frame
        WindowFrame.Type frameType = WindowFrame.Type.RANGE;
        FrameBound.Type frameStartType = FrameBound.Type.UNBOUNDED_PRECEDING;
        FrameBound.Type frameEndType = FrameBound.Type.CURRENT_ROW;
        Expression frameStart = null;
        Expression frameEnd = null;
        if (window.getFrame().isPresent()) {
            WindowFrame frame = window.getFrame().get();
            frameType = frame.getType();
            frameStartType = frame.getStart().getType();
            frameStart = frame.getStart().getValue().orElse(null);
            if (frame.getEnd().isPresent()) {
                frameEndType = frame.getEnd().get().getType();
                frameEnd = frame.getEnd().get().getValue().orElse(null);
            }
        }
        // Pre-project inputs
        ImmutableList.Builder<Expression> inputs = ImmutableList.<Expression>builder().addAll(windowFunction.getArguments()).addAll(window.getPartitionBy()).addAll(Iterables.transform(getSortItemsFromOrderBy(window.getOrderBy()), SortItem::getSortKey));
        if (frameStart != null) {
            inputs.add(frameStart);
        }
        if (frameEnd != null) {
            inputs.add(frameEnd);
        }
        subPlan = subPlan.appendProjections(inputs.build(), variableAllocator, idAllocator);
        // Rewrite PARTITION BY in terms of pre-projected inputs
        ImmutableList.Builder<VariableReferenceExpression> partitionByVariables = ImmutableList.builder();
        for (Expression expression : window.getPartitionBy()) {
            partitionByVariables.add(subPlan.translateToVariable(expression));
        }
        // Rewrite ORDER BY in terms of pre-projected inputs
        LinkedHashMap<VariableReferenceExpression, SortOrder> orderings = new LinkedHashMap<>();
        for (SortItem item : getSortItemsFromOrderBy(window.getOrderBy())) {
            VariableReferenceExpression variable = subPlan.translateToVariable(item.getSortKey());
            // don't override existing keys, i.e. when "ORDER BY a ASC, a DESC" is specified
            orderings.putIfAbsent(variable, toSortOrder(item));
        }
        // Rewrite frame bounds in terms of pre-projected inputs
        Optional<VariableReferenceExpression> frameStartVariable = Optional.empty();
        Optional<VariableReferenceExpression> frameEndVariable = Optional.empty();
        if (frameStart != null) {
            frameStartVariable = Optional.of(subPlan.translate(frameStart));
        }
        if (frameEnd != null) {
            frameEndVariable = Optional.of(subPlan.translate(frameEnd));
        }
        WindowNode.Frame frame = new WindowNode.Frame(toWindowType(frameType), toBoundType(frameStartType), frameStartVariable, toBoundType(frameEndType), frameEndVariable, Optional.ofNullable(frameStart).map(Expression::toString), Optional.ofNullable(frameEnd).map(Expression::toString));
        TranslationMap outputTranslations = subPlan.copyTranslations();
        // Rewrite function call in terms of pre-projected inputs
        Expression rewritten = subPlan.rewrite(windowFunction);
        boolean needCoercion = rewritten instanceof Cast;
        // Strip out the cast and add it back as a post-projection
        if (rewritten instanceof Cast) {
            rewritten = ((Cast) rewritten).getExpression();
        }
        // If refers to existing variable, don't create another PlanNode
        if (rewritten instanceof SymbolReference) {
            if (needCoercion) {
                subPlan = explicitCoercionVariables(subPlan, subPlan.getRoot().getOutputVariables(), ImmutableList.of(windowFunction));
            }
            continue;
        }
        Type returnType = analysis.getType(windowFunction);
        VariableReferenceExpression newVariable = variableAllocator.newVariable(rewritten, returnType);
        outputTranslations.put(windowFunction, newVariable);
        // TODO: replace arguments with RowExpression once we introduce subquery expression for RowExpression (#12745).
        // Wrap all arguments in CallExpression to be RawExpression.
        // The utility that work on the CallExpression should be aware of the RawExpression handling.
        // The interface will be dirty until we introduce subquery expression for RowExpression.
        // With subqueries, the translation from Expression to RowExpression can happen here.
        WindowNode.Function function = new WindowNode.Function(call(windowFunction.getName().toString(), analysis.getFunctionHandle(windowFunction), returnType, ((FunctionCall) rewritten).getArguments().stream().map(OriginalExpressionUtils::castToRowExpression).collect(toImmutableList())), frame, windowFunction.isIgnoreNulls());
        ImmutableList.Builder<VariableReferenceExpression> orderByVariables = ImmutableList.builder();
        orderByVariables.addAll(orderings.keySet());
        Optional<OrderingScheme> orderingScheme = Optional.empty();
        if (!orderings.isEmpty()) {
            orderingScheme = Optional.of(new OrderingScheme(orderByVariables.build().stream().map(variable -> new Ordering(variable, orderings.get(variable))).collect(toImmutableList())));
        }
        // create window node
        subPlan = new PlanBuilder(outputTranslations, new WindowNode(subPlan.getRoot().getSourceLocation(), idAllocator.getNextId(), subPlan.getRoot(), new WindowNode.Specification(partitionByVariables.build(), orderingScheme), ImmutableMap.of(newVariable, function), Optional.empty(), ImmutableSet.of(), 0));
        if (needCoercion) {
            subPlan = explicitCoercionVariables(subPlan, subPlan.getRoot().getOutputVariables(), ImmutableList.of(windowFunction));
        }
    }
    return subPlan;
}

Example 57 with CallExpression

use of com.facebook.presto.spi.relation.CallExpression in project presto by prestodb.

the class StatisticsAggregationPlanner method createStatisticsAggregation.

public TableStatisticAggregation createStatisticsAggregation(TableStatisticsMetadata statisticsMetadata, Map<String, VariableReferenceExpression> columnToVariableMap, boolean useOriginalExpression) {
    StatisticAggregationsDescriptor.Builder<VariableReferenceExpression> descriptor = StatisticAggregationsDescriptor.builder();
    List<String> groupingColumns = statisticsMetadata.getGroupingColumns();
    List<VariableReferenceExpression> groupingVariables = groupingColumns.stream().map(columnToVariableMap::get).collect(toImmutableList());
    for (int i = 0; i < groupingVariables.size(); i++) {
        descriptor.addGrouping(groupingColumns.get(i), groupingVariables.get(i));
    }
    ImmutableMap.Builder<VariableReferenceExpression, AggregationNode.Aggregation> aggregations = ImmutableMap.builder();
    StandardFunctionResolution functionResolution = new FunctionResolution(metadata.getFunctionAndTypeManager());
    for (TableStatisticType type : statisticsMetadata.getTableStatistics()) {
        if (type != ROW_COUNT) {
            throw new PrestoException(NOT_SUPPORTED, "Table-wide statistic type not supported: " + type);
        }
        AggregationNode.Aggregation aggregation = new AggregationNode.Aggregation(new CallExpression("count", functionResolution.countFunction(), BIGINT, ImmutableList.of()), Optional.empty(), Optional.empty(), false, Optional.empty());
        VariableReferenceExpression variable = variableAllocator.newVariable("rowCount", BIGINT);
        aggregations.put(variable, aggregation);
        descriptor.addTableStatistic(ROW_COUNT, variable);
    }
    for (ColumnStatisticMetadata columnStatisticMetadata : statisticsMetadata.getColumnStatistics()) {
        String columnName = columnStatisticMetadata.getColumnName();
        ColumnStatisticType statisticType = columnStatisticMetadata.getStatisticType();
        VariableReferenceExpression inputVariable = columnToVariableMap.get(columnName);
        verify(inputVariable != null, "inputVariable is null");
        ColumnStatisticsAggregation aggregation = createColumnAggregation(statisticType, inputVariable, useOriginalExpression);
        VariableReferenceExpression variable = variableAllocator.newVariable(statisticType + ":" + columnName, aggregation.getOutputType());
        aggregations.put(variable, aggregation.getAggregation());
        descriptor.addColumnStatistic(columnStatisticMetadata, variable);
    }
    StatisticAggregations aggregation = new StatisticAggregations(aggregations.build(), groupingVariables);
    return new TableStatisticAggregation(aggregation, descriptor.build());
}

Example 58 with CallExpression

use of com.facebook.presto.spi.relation.CallExpression in project presto by prestodb.

the class StatisticsAggregationPlanner method createAggregation.

private ColumnStatisticsAggregation createAggregation(String functionName, RowExpression input, Type inputType, Type outputType) {
    FunctionAndTypeManager functionAndTypeManager = metadata.getFunctionAndTypeManager();
    FunctionHandle functionHandle = functionAndTypeManager.lookupFunction(functionName, TypeSignatureProvider.fromTypes(ImmutableList.of(inputType)));
    Type resolvedType = metadata.getType(getOnlyElement(functionAndTypeManager.getFunctionMetadata(functionHandle).getArgumentTypes()));
    verify(resolvedType.equals(inputType), "resolved function input type does not match the input type: %s != %s", resolvedType, inputType);
    return new ColumnStatisticsAggregation(new AggregationNode.Aggregation(new CallExpression(input.getSourceLocation(), functionName, functionHandle, outputType, ImmutableList.of(input)), Optional.empty(), Optional.empty(), false, Optional.empty()), outputType);
}

Example 59 with CallExpression

use of com.facebook.presto.spi.relation.CallExpression in project presto by prestodb.

the class AddIntermediateAggregations method outputsAsInputs.

/**
 * Rewrite assignments so that inputs are in terms of the output symbols.
 * <p>
 * Example:
 * 'a' := sum('b') => 'a' := sum('a')
 * 'a' := count(*) => 'a' := count('a')
 */
private static Map<VariableReferenceExpression, Aggregation> outputsAsInputs(Map<VariableReferenceExpression, Aggregation> assignments) {
    ImmutableMap.Builder<VariableReferenceExpression, Aggregation> builder = ImmutableMap.builder();
    for (Map.Entry<VariableReferenceExpression, Aggregation> entry : assignments.entrySet()) {
        VariableReferenceExpression output = entry.getKey();
        Aggregation aggregation = entry.getValue();
        checkState(!aggregation.getOrderBy().isPresent(), "Intermediate aggregation does not support ORDER BY");
        builder.put(output, new Aggregation(new CallExpression(aggregation.getCall().getSourceLocation(), aggregation.getCall().getDisplayName(), aggregation.getCall().getFunctionHandle(), aggregation.getCall().getType(), ImmutableList.of(output)), Optional.empty(), Optional.empty(), false, // No mask for INTERMEDIATE
        Optional.empty()));
    }
    return builder.build();
}

Example 60 with CallExpression

use of com.facebook.presto.spi.relation.CallExpression in project presto by prestodb.

the class TestPruneUnreferencedOutputs method windowNodePruning.

/**
 * Test that the unreferenced output pruning works correctly when WindowNode is pruned as no downstream operators are consuming the window function output
 */
@Test
public void windowNodePruning() {
    FunctionHandle functionHandle = createTestMetadataManager().getFunctionAndTypeManager().lookupFunction("rank", ImmutableList.of());
    CallExpression call = call("rank", functionHandle, BIGINT);
    WindowNode.Frame frame = new WindowNode.Frame(RANGE, UNBOUNDED_PRECEDING, Optional.empty(), UNBOUNDED_FOLLOWING, Optional.empty(), Optional.empty(), Optional.empty());
    assertRuleApplication().on(p -> p.output(ImmutableList.of("user_uuid"), ImmutableList.of(p.variable("user_uuid", VARCHAR)), p.project(Assignments.of(p.variable("user_uuid", VARCHAR), p.variable("user_uuid", VARCHAR)), p.window(new WindowNode.Specification(ImmutableList.of(p.variable("user_uuid", VARCHAR)), Optional.of(new OrderingScheme(ImmutableList.of(new Ordering(p.variable("expr"), SortOrder.ASC_NULLS_LAST), new Ordering(p.variable("random"), SortOrder.ASC_NULLS_LAST))))), ImmutableMap.of(p.variable("rank"), new WindowNode.Function(call, frame, false)), p.project(Assignments.builder().put(p.variable("user_uuid", VARCHAR), p.variable("user_uuid", VARCHAR)).put(p.variable("expr", BIGINT), p.variable("expr", BIGINT)).put(p.variable("random", BIGINT), p.rowExpression("random()")).build(), p.values(p.variable("user_uuid", VARCHAR), p.variable("expr", BIGINT))))))).matches(output(project(project(values("user_uuid")))));
}