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

Example 6 with KeyExpression

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

the class InExtractor method adjustOrdering.

/**
 * Adjust plan ordering for the result of handling these {@code IN} clauses.
 * @param ordering the base plan ordering
 * @param asPrefix {@code true} if the {@code IN} conditions become part of an equality prefix (because the elements are merged in order),
 * {@code false} if a separate ordering beforehand (because the elements are concatenated in turn)
 * @return a new plan ordering
 */
@Nullable
public PlanOrderingKey adjustOrdering(@Nullable PlanOrderingKey ordering, boolean asPrefix) {
    if (ordering == null || inClauses.isEmpty()) {
        return ordering;
    }
    // All the ordering keys from the IN joins look like non-prefix ordering and come before the others.
    final List<KeyExpression> keys = new ArrayList<>(ordering.getKeys());
    int prefixSize = ordering.getPrefixSize();
    final int primaryKeyStart = ordering.getPrimaryKeyStart();
    final int primaryKeyTailFromEnd = keys.size() - ordering.getPrimaryKeyTail();
    for (int i = 0; i < inClauses.size(); i++) {
        final KeyExpression inOrdering = inClauses.get(i).orderingKey;
        if (inOrdering == null) {
            return null;
        }
        final int position = keys.indexOf(inOrdering);
        if (position >= 0) {
            if (position < prefixSize) {
                // No longer an equality.
                prefixSize--;
            }
            keys.remove(position);
        }
        keys.add(prefixSize + i, inOrdering);
        if (asPrefix) {
            prefixSize++;
        }
    }
    return new PlanOrderingKey(keys, prefixSize, primaryKeyStart, keys.size() - primaryKeyTailFromEnd);
}

Example 7 with KeyExpression

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

the class AvailableFields method fromIndex.

@Nonnull
public static AvailableFields fromIndex(@Nonnull RecordType recordType, @Nonnull Index index, @Nonnull PlannableIndexTypes indexTypes, @Nullable KeyExpression commonPrimaryKey) {
    final KeyExpression rootExpression = index.getRootExpression();
    final List<KeyExpression> keyFields = new ArrayList<>();
    final List<KeyExpression> valueFields = new ArrayList<>();
    final List<KeyExpression> nonStoredLuceneExpressions = new ArrayList<>();
    if (indexTypes.getTextTypes().contains(index.getType())) {
        // Full text index entries have all of their fields except the tokenized one.
        keyFields.addAll(TextScanPlanner.getOtherFields(rootExpression));
    } else if (indexTypes.getValueTypes().contains(index.getType()) || indexTypes.getRankTypes().contains(index.getType())) {
        keyFields.addAll(KeyExpression.getKeyFields(rootExpression));
        valueFields.addAll(KeyExpression.getValueFields(rootExpression));
    } else if (indexTypes.getLuceneTypes().contains(index.getType())) {
        // Todo: this will not take into account stored non-primary-key fields.
        nonStoredLuceneExpressions.addAll(rootExpression.normalizeKeyForPositions());
        keyFields.addAll(rootExpression.normalizeKeyForPositions());
        nonStoredLuceneExpressions.removeAll(recordType.getPrimaryKey().normalizeKeyForPositions());
    } else {
        // Aggregate index
        if (rootExpression instanceof GroupingKeyExpression) {
            GroupingKeyExpression groupingKeyExpression = (GroupingKeyExpression) rootExpression;
            keyFields.addAll(groupingKeyExpression.getGroupingSubKey().normalizeKeyForPositions());
        }
    }
    // Like FDBRecordStoreBase.indexEntryKey(), but with key expressions instead of actual values.
    final List<KeyExpression> primaryKeys = new ArrayList<>(commonPrimaryKey == null ? Collections.emptyList() : commonPrimaryKey.normalizeKeyForPositions());
    index.trimPrimaryKey(primaryKeys);
    keyFields.addAll(primaryKeys);
    Map<KeyExpression, FieldData> fields = new HashMap<>();
    final IndexKeyValueToPartialRecord.Builder builder = IndexKeyValueToPartialRecord.newBuilder(recordType);
    for (int i = 0; i < keyFields.size(); i++) {
        KeyExpression keyField = keyFields.get(i);
        FieldData fieldData = FieldData.of(IndexKeyValueToPartialRecord.TupleSource.KEY, i);
        if (!nonStoredLuceneExpressions.contains(keyField) && !keyField.createsDuplicates() && addCoveringField(keyField, fieldData, builder)) {
            fields.put(keyField, fieldData);
        }
    }
    for (int i = 0; i < valueFields.size(); i++) {
        KeyExpression valueField = valueFields.get(i);
        FieldData fieldData = FieldData.of(IndexKeyValueToPartialRecord.TupleSource.VALUE, i);
        if (!nonStoredLuceneExpressions.contains(valueField) && !valueField.createsDuplicates() && addCoveringField(valueField, fieldData, builder)) {
            fields.put(valueField, fieldData);
        }
    }
    if (!builder.isValid()) {
        return NO_FIELDS;
    }
    return new AvailableFields(fields);
}

Example 8 with KeyExpression

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

the class PlanOrderingKey method isOrderingCompatible.

/**
 * Is the given ordering key compatible with the candidate merge key?
 * A subkeys of the candidate key can appear in the equals part of the ordering in any order.
 * The remainder must match the ordering key after the equality.
 */
private static boolean isOrderingCompatible(@Nonnull PlanOrderingKey planOrderingKey, @Nonnull KeyExpression candidateKey) {
    int nextNonPrefix = planOrderingKey.prefixSize;
    for (KeyExpression component : candidateKey.normalizeKeyForPositions()) {
        int pos = planOrderingKey.keys.indexOf(component);
        if (pos < 0) {
            // Not present at all.
            return false;
        }
        if (pos < planOrderingKey.prefixSize) {
            // ordered by it.
            continue;
        }
        // Otherwise, components need to be in order.
        if (pos != nextNonPrefix) {
            return false;
        }
        nextNonPrefix++;
    }
    return true;
}

Example 9 with KeyExpression

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

the class StandardIndexMaintainer method evaluateIndex.

/**
 * Apply the key and value expressions to a <code>record</code>.
 * @param <M> the message type of the record
 * @param record the record from which the index will extract its key and value
 * @return a list of index keys and values
 */
@Override
public <M extends Message> List<IndexEntry> evaluateIndex(@Nonnull FDBRecord<M> record) {
    final KeyExpression rootExpression = state.index.getRootExpression();
    final List<Key.Evaluated> indexKeys = rootExpression.evaluate(record);
    // so we have to tease them apart.
    if (rootExpression instanceof KeyWithValueExpression) {
        final KeyWithValueExpression keyWithValueExpression = (KeyWithValueExpression) rootExpression;
        return indexKeys.stream().map(key -> new IndexEntry(state.index, keyWithValueExpression.getKey(key), keyWithValueExpression.getValue(key))).collect(Collectors.toList());
    }
    return indexKeys.stream().map(key -> new IndexEntry(state.index, key)).collect(Collectors.toList());
}

Example 10 with KeyExpression

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

the class ScalarTranslationVisitor method visitExpression.

@Nonnull
@Override
public Value visitExpression(@Nonnull final ThenKeyExpression thenKeyExpression) {
    if (thenKeyExpression.getColumnSize() > 1) {
        throw new RecordCoreException("cannot expand ThenKeyExpression in scalar expansion");
    }
    final ScalarVisitorState state = getCurrentState();
    final KeyExpression child = Iterables.getOnlyElement(thenKeyExpression.getChildren());
    return pop(child.expand(push(state)));
}