Examples with KeyExpression com.apple.foundationdb.record.metadata.expressions.KeyExpression used on opensource projects

Example 21 with KeyExpression

use of com.apple.foundationdb.record.metadata.expressions.KeyExpression in project fdb-record-layer by FoundationDB.

the class ImplementInUnionRule method orderingForInUnion.

private static Optional<Ordering> orderingForInUnion(@Nonnull Ordering providedOrdering, @Nonnull RequestedOrdering requestedOrdering, @Nonnull Set<KeyExpression> innerBoundExpressions) {
    final var availableInnerBoundExpressions = Sets.newHashSet(innerBoundExpressions);
    final var providedKeyPartIterator = Iterators.peekingIterator(providedOrdering.getOrderingKeyParts().iterator());
    final ImmutableList.Builder<KeyPart> resultingOrderingKeyPartBuilder = ImmutableList.builder();
    for (final var requestedKeyPart : requestedOrdering.getOrderingKeyParts()) {
        KeyPart toBeAdded = null;
        if (providedKeyPartIterator.hasNext()) {
            final var providedKeyPart = providedKeyPartIterator.peek();
            if (requestedKeyPart.equals(providedKeyPart)) {
                toBeAdded = providedKeyPart;
                providedKeyPartIterator.next();
            }
        }
        if (toBeAdded == null) {
            final var requestedKeyExpression = requestedKeyPart.getNormalizedKeyExpression();
            if (innerBoundExpressions.contains(requestedKeyExpression)) {
                toBeAdded = requestedKeyPart;
                availableInnerBoundExpressions.remove(requestedKeyExpression);
            }
        }
        if (toBeAdded != null) {
            resultingOrderingKeyPartBuilder.add(toBeAdded);
        } else {
            return Optional.empty();
        }
    }
    // 
    while (providedKeyPartIterator.hasNext()) {
        final var providedKeyPart = providedKeyPartIterator.next();
        resultingOrderingKeyPartBuilder.add(providedKeyPart);
    }
    final SetMultimap<KeyExpression, Comparisons.Comparison> resultEqualityBoundKeyMap = HashMultimap.create(providedOrdering.getEqualityBoundKeyMap());
    innerBoundExpressions.forEach(resultEqualityBoundKeyMap::removeAll);
    return Optional.of(new Ordering(resultEqualityBoundKeyMap, resultingOrderingKeyPartBuilder.build(), providedOrdering.isDistinct()));
}

Example 22 with KeyExpression

use of com.apple.foundationdb.record.metadata.expressions.KeyExpression in project fdb-record-layer by FoundationDB.

the class ImplementInUnionRule method onMatch.

@SuppressWarnings({ "unchecked", "java:S135" })
@Override
public void onMatch(@Nonnull PlannerRuleCall call) {
    final var context = call.getContext();
    final var bindings = call.getBindings();
    final var requestedOrderingsOptional = call.getInterestingProperty(OrderingAttribute.ORDERING);
    if (requestedOrderingsOptional.isEmpty()) {
        return;
    }
    final var requestedOrderings = requestedOrderingsOptional.get();
    final var commonPrimaryKey = context.getCommonPrimaryKey();
    if (commonPrimaryKey == null) {
        return;
    }
    final var selectExpression = bindings.get(root);
    if (!selectExpression.getPredicates().isEmpty()) {
        return;
    }
    final var explodeQuantifiers = bindings.get(explodeQuantifiersMatcher);
    if (explodeQuantifiers.isEmpty()) {
        return;
    }
    final var explodeAliases = Quantifiers.aliases(explodeQuantifiers);
    final var innerQuantifierOptional = findInnerQuantifier(selectExpression, explodeQuantifiers, explodeAliases);
    if (innerQuantifierOptional.isEmpty()) {
        return;
    }
    final var innerQuantifier = innerQuantifierOptional.get();
    final List<? extends Value> resultValues = selectExpression.getResultValues();
    if (resultValues.stream().anyMatch(resultValue -> !(resultValue instanceof QuantifiedColumnValue) || !((QuantifiedColumnValue) resultValue).getAlias().equals(innerQuantifier.getAlias()))) {
        return;
    }
    final var explodeExpressions = bindings.getAll(explodeExpressionMatcher);
    final var quantifierToExplodeBiMap = computeQuantifierToExplodeMap(explodeQuantifiers, explodeExpressions.stream().collect(LinkedIdentitySet.toLinkedIdentitySet()));
    final var explodeToQuantifierBiMap = quantifierToExplodeBiMap.inverse();
    final var sourcesBuilder = ImmutableList.<InSource>builder();
    for (final var explodeExpression : explodeExpressions) {
        final var explodeQuantifier = Objects.requireNonNull(explodeToQuantifierBiMap.getUnwrapped(explodeExpression));
        final List<? extends Value> explodeResultValues = explodeExpression.getResultValues();
        if (explodeResultValues.size() != 1) {
            return;
        }
        final Value explodeValue = Iterables.getOnlyElement(explodeResultValues);
        // 
        // Create the source for the in-union plan
        // 
        final InSource inSource;
        if (explodeValue instanceof LiteralValue<?>) {
            final Object literalValue = ((LiteralValue<?>) explodeValue).getLiteralValue();
            if (literalValue instanceof List<?>) {
                inSource = new InValuesSource(CORRELATION.bindingName(explodeQuantifier.getAlias().getId()), (List<Object>) literalValue);
            } else {
                return;
            }
        } else if (explodeValue instanceof QuantifiedColumnValue) {
            inSource = new InParameterSource(CORRELATION.bindingName(explodeQuantifier.getAlias().getId()), ((QuantifiedColumnValue) explodeValue).getAlias().getId());
        } else {
            return;
        }
        sourcesBuilder.add(inSource);
    }
    final var inSources = sourcesBuilder.build();
    final Map<Ordering, ImmutableList<RecordQueryPlan>> groupedByOrdering = innerQuantifier.getRangesOver().getMembers().stream().flatMap(relationalExpression -> relationalExpression.narrowMaybe(RecordQueryPlan.class).stream()).flatMap(plan -> {
        final Optional<Ordering> orderingForLegOptional = OrderingProperty.evaluate(plan, context);
        return orderingForLegOptional.stream().map(ordering -> Pair.of(ordering, plan));
    }).collect(Collectors.groupingBy(Pair::getLeft, Collectors.mapping(Pair::getRight, ImmutableList.toImmutableList())));
    final int attemptFailedInJoinAsUnionMaxSize = call.getContext().getPlannerConfiguration().getAttemptFailedInJoinAsUnionMaxSize();
    for (final Map.Entry<Ordering, ImmutableList<RecordQueryPlan>> providedOrderingEntry : groupedByOrdering.entrySet()) {
        for (final RequestedOrdering requestedOrdering : requestedOrderings) {
            final var providedOrdering = providedOrderingEntry.getKey();
            final var matchingKeyExpressionsBuilder = ImmutableSet.<KeyExpression>builder();
            for (Map.Entry<KeyExpression, Comparisons.Comparison> expressionComparisonEntry : providedOrdering.getEqualityBoundKeyMap().entries()) {
                final Comparisons.Comparison comparison = expressionComparisonEntry.getValue();
                if (comparison.getType() == Comparisons.Type.EQUALS && comparison instanceof Comparisons.ParameterComparison) {
                    final Comparisons.ParameterComparison parameterComparison = (Comparisons.ParameterComparison) comparison;
                    if (parameterComparison.isCorrelation() && explodeAliases.containsAll(parameterComparison.getCorrelatedTo())) {
                        matchingKeyExpressionsBuilder.add(expressionComparisonEntry.getKey());
                    }
                }
            }
            // Compute a comparison key that satisfies the requested ordering
            final Optional<Ordering> combinedOrderingOptional = orderingForInUnion(providedOrdering, requestedOrdering, matchingKeyExpressionsBuilder.build());
            if (combinedOrderingOptional.isEmpty()) {
                continue;
            }
            final Ordering combinedOrdering = combinedOrderingOptional.get();
            final List<KeyPart> orderingKeyParts = combinedOrdering.getOrderingKeyParts();
            final List<KeyExpression> orderingKeys = orderingKeyParts.stream().map(KeyPart::getNormalizedKeyExpression).collect(ImmutableList.toImmutableList());
            // 
            // At this point we know we can implement the distinct union over the partitions of compatibly ordered plans
            // 
            final KeyExpression comparisonKey = orderingKeys.size() == 1 ? Iterables.getOnlyElement(orderingKeys) : Key.Expressions.concat(orderingKeys);
            final GroupExpressionRef<RecordQueryPlan> newInnerPlanReference = GroupExpressionRef.from(providedOrderingEntry.getValue());
            final Quantifier.Physical newInnerQuantifier = Quantifier.physical(newInnerPlanReference);
            call.yield(call.ref(new RecordQueryInUnionPlan(newInnerQuantifier, inSources, comparisonKey, RecordQueryUnionPlanBase.isReversed(ImmutableList.of(newInnerQuantifier)), attemptFailedInJoinAsUnionMaxSize)));
        }
    }
}

Example 23 with KeyExpression

use of com.apple.foundationdb.record.metadata.expressions.KeyExpression in project fdb-record-layer by FoundationDB.

the class OrderingProperty method deriveForPredicatesFilterFromOrderings.

public static Optional<Ordering> deriveForPredicatesFilterFromOrderings(@Nonnull final List<Optional<Ordering>> orderingOptionals, @Nonnull final RecordQueryPredicatesFilterPlan predicatesFilterPlan) {
    final Optional<Ordering> childOrderingOptional = Iterables.getOnlyElement(orderingOptionals);
    if (childOrderingOptional.isPresent()) {
        final Ordering childOrdering = childOrderingOptional.get();
        final SetMultimap<KeyExpression, Comparisons.Comparison> equalityBoundFileKeyExpressions = predicatesFilterPlan.getPredicates().stream().flatMap(queryPredicate -> {
            if (!(queryPredicate instanceof ValuePredicate)) {
                return Stream.empty();
            }
            final ValuePredicate valuePredicate = (ValuePredicate) queryPredicate;
            if (!valuePredicate.getComparison().getType().isEquality()) {
                return Stream.empty();
            }
            if (!(valuePredicate.getValue() instanceof FieldValue)) {
                return Stream.of();
            }
            return Stream.of(Pair.of((FieldValue) valuePredicate.getValue(), valuePredicate.getComparison()));
        }).map(valueComparisonPair -> {
            final FieldValue fieldValue = valueComparisonPair.getLeft();
            final String fieldName = fieldValue.getFieldName();
            KeyExpression keyExpression = Key.Expressions.field(fieldName);
            final List<String> fieldPrefix = fieldValue.getFieldPrefix();
            for (int i = fieldPrefix.size() - 1; i >= 0; i--) {
                keyExpression = Key.Expressions.field(fieldPrefix.get(i)).nest(keyExpression);
            }
            return Pair.of(keyExpression, valueComparisonPair.getRight());
        }).collect(ImmutableSetMultimap.toImmutableSetMultimap(Pair::getLeft, Pair::getRight));
        final ImmutableList<KeyPart> resultOrderingKeyParts = childOrdering.getOrderingKeyParts().stream().filter(keyPart -> !equalityBoundFileKeyExpressions.containsKey(keyPart.getNormalizedKeyExpression())).collect(ImmutableList.toImmutableList());
        final SetMultimap<KeyExpression, Comparisons.Comparison> resultEqualityBoundKeyMap = HashMultimap.create(childOrdering.getEqualityBoundKeyMap());
        equalityBoundFileKeyExpressions.forEach(resultEqualityBoundKeyMap::put);
        return Optional.of(new Ordering(resultEqualityBoundKeyMap, resultOrderingKeyParts, childOrdering.isDistinct()));
    } else {
        return Optional.empty();
    }
}

Example 24 with KeyExpression

use of com.apple.foundationdb.record.metadata.expressions.KeyExpression in project fdb-record-layer by FoundationDB.

the class OrderingProperty method deriveForUnionFromOrderings.

public static Optional<Ordering> deriveForUnionFromOrderings(@Nonnull final List<Optional<Ordering>> orderingOptionals, @Nonnull final RequestedOrdering requestedOrdering, @Nonnull final BinaryOperator<SetMultimap<KeyExpression, Comparisons.Comparison>> combineFn) {
    final Optional<SetMultimap<KeyExpression, Comparisons.Comparison>> commonEqualityBoundKeysMapOptional = Ordering.combineEqualityBoundKeys(orderingOptionals, combineFn);
    if (commonEqualityBoundKeysMapOptional.isEmpty()) {
        return Optional.empty();
    }
    final var commonEqualityBoundKeysMap = commonEqualityBoundKeysMapOptional.get();
    final Optional<List<KeyPart>> commonOrderingKeysOptional = Ordering.commonOrderingKeys(orderingOptionals, requestedOrdering);
    if (commonOrderingKeysOptional.isEmpty()) {
        return Optional.empty();
    }
    final var commonOrderingKeys = commonOrderingKeysOptional.get().stream().filter(keyPart -> !commonEqualityBoundKeysMap.containsKey(keyPart.getNormalizedKeyExpression())).collect(ImmutableList.toImmutableList());
    return Optional.of(new Ordering(commonEqualityBoundKeysMap, commonOrderingKeys, false));
}

Example 25 with KeyExpression

use of com.apple.foundationdb.record.metadata.expressions.KeyExpression in project fdb-record-layer by FoundationDB.

the class OrderingProperty method evaluateAtRef.

@Nonnull
@Override
public Optional<Ordering> evaluateAtRef(@Nonnull ExpressionRef<? extends RelationalExpression> ref, @Nonnull List<Optional<Ordering>> orderingOptionals) {
    final Optional<SetMultimap<KeyExpression, Comparisons.Comparison>> commonEqualityBoundKeysMapOptional = Ordering.combineEqualityBoundKeys(orderingOptionals, Ordering::intersectEqualityBoundKeys);
    if (commonEqualityBoundKeysMapOptional.isEmpty()) {
        return Optional.empty();
    }
    final var commonEqualityBoundKeysMap = commonEqualityBoundKeysMapOptional.get();
    final Optional<List<KeyPart>> commonOrderingKeysOptional = Ordering.commonOrderingKeys(orderingOptionals, RequestedOrdering.preserve());
    if (commonOrderingKeysOptional.isEmpty()) {
        return Optional.empty();
    }
    final var commonOrderingKeys = commonOrderingKeysOptional.get().stream().filter(keyPart -> !commonEqualityBoundKeysMap.containsKey(keyPart.getNormalizedKeyExpression())).collect(ImmutableList.toImmutableList());
    final var allAreDistinct = orderingOptionals.stream().allMatch(orderingOptional -> orderingOptional.map(Ordering::isDistinct).orElse(false));
    return Optional.of(new Ordering(commonEqualityBoundKeysMap, commonOrderingKeys, allAreDistinct));
}