Examples with EvaluationContext com.apple.foundationdb.record.EvaluationContext used on opensource projects

Example 41 with EvaluationContext

use of com.apple.foundationdb.record.EvaluationContext in project fdb-record-layer by FoundationDB.

the class RecordQueryUnionPlanBase method executePlan.

@Nonnull
@Override
public <M extends Message> RecordCursor<QueryResult> executePlan(@Nonnull final FDBRecordStoreBase<M> store, @Nonnull final EvaluationContext context, @Nullable final byte[] continuation, @Nonnull final ExecuteProperties executeProperties) {
    final ExecuteProperties childExecuteProperties;
    // Can pass the limit down to all sides, since that is the most we'll take total.
    if (executeProperties.getSkip() > 0) {
        childExecuteProperties = executeProperties.clearSkipAndAdjustLimit();
    } else {
        childExecuteProperties = executeProperties;
    }
    final List<Function<byte[], RecordCursor<FDBQueriedRecord<M>>>> childCursorFunctions = getChildStream().map(childPlan -> (Function<byte[], RecordCursor<FDBQueriedRecord<M>>>) ((byte[] childContinuation) -> childPlan.executePlan(store, context, childContinuation, childExecuteProperties).map(result -> result.getQueriedRecord(0)))).collect(Collectors.toList());
    return createUnionCursor(store, childCursorFunctions, continuation).skipThenLimit(executeProperties.getSkip(), executeProperties.getReturnedRowLimit()).map(QueryResult::of);
}

Example 42 with EvaluationContext

use of com.apple.foundationdb.record.EvaluationContext in project fdb-record-layer by FoundationDB.

the class RecordQuerySortPlan method executePlan.

@Nonnull
@Override
public <M extends Message> RecordCursor<QueryResult> executePlan(@Nonnull FDBRecordStoreBase<M> store, @Nonnull EvaluationContext context, @Nullable byte[] continuation, @Nonnull ExecuteProperties executeProperties) {
    // Since we are sorting, we need to feed through everything from the inner plan,
    // even just to get the top few.
    final ExecuteProperties executeInner = executeProperties.clearSkipAndLimit();
    final Function<byte[], RecordCursor<FDBQueriedRecord<M>>> innerCursor = innerContinuation -> getChild().executePlan(store, context, innerContinuation, executeInner).map(result -> result.<M>getQueriedRecord(0));
    final int skip = executeProperties.getSkip();
    final int limit = executeProperties.getReturnedRowLimitOrMax();
    final int maxRecordsToRead = limit == Integer.MAX_VALUE ? limit : skip + limit;
    final RecordQuerySortAdapter<M> adapter = key.getAdapter(store, maxRecordsToRead);
    final FDBStoreTimer timer = store.getTimer();
    final RecordCursor<FDBQueriedRecord<M>> sorted;
    if (adapter.isMemoryOnly()) {
        sorted = MemorySortCursor.create(adapter, innerCursor, timer, continuation).skipThenLimit(skip, limit);
    } else {
        sorted = FileSortCursor.create(adapter, innerCursor, timer, continuation, skip, limit);
    }
    return sorted.map(QueryResult::of);
}

Example 43 with EvaluationContext

use of com.apple.foundationdb.record.EvaluationContext in project fdb-record-layer by FoundationDB.

the class JoinedRecordPlan method execute.

@Override
@Nonnull
public <M extends Message> RecordCursor<FDBSyntheticRecord> execute(@Nonnull FDBRecordStore store, @Nonnull FDBStoredRecord<M> record, @Nullable byte[] continuation, @Nonnull ExecuteProperties executeProperties) {
    final EvaluationContext context = joinedTypes.get(0).bind(EvaluationContext.EMPTY, record);
    final RecordCursor<EvaluationContext> joinedContexts;
    if (queries.size() == 1) {
        joinedContexts = query(0, store, context, continuation, executeProperties);
    } else {
        final ExecuteProperties baseProperties = executeProperties.clearSkipAndLimit();
        joinedContexts = nest(0, store.getPipelineSize(PipelineOperation.SYNTHETIC_RECORD_JOIN), store, context, continuation, baseProperties).skipThenLimit(executeProperties.getSkip(), executeProperties.getReturnedRowLimit());
    }
    return joinedContexts.map(this::toSyntheticRecord);
}