Examples with UnorderedPrimaryKeyDistinctVisitor com.apple.foundationdb.record.query.plan.visitor.UnorderedPrimaryKeyDistinctVisitor used on opensource projects

Example 1 with UnorderedPrimaryKeyDistinctVisitor

use of com.apple.foundationdb.record.query.plan.visitor.UnorderedPrimaryKeyDistinctVisitor in project fdb-record-layer by FoundationDB.

the class RecordQueryPlanner method tryToConvertToCoveringPlan.

@Nonnull
@SuppressWarnings("PMD.CompareObjectsWithEquals")
private RecordQueryPlan tryToConvertToCoveringPlan(@Nonnull PlanContext planContext, @Nonnull RecordQueryPlan chosenPlan) {
    if (planContext.query.getRequiredResults() == null) {
        // This should already be true when calling, but as a safety precaution, check here anyway.
        return chosenPlan;
    }
    final Set<KeyExpression> resultFields = new HashSet<>(planContext.query.getRequiredResults().size());
    for (KeyExpression resultField : planContext.query.getRequiredResults()) {
        resultFields.addAll(resultField.normalizeKeyForPositions());
    }
    chosenPlan = chosenPlan.accept(new UnorderedPrimaryKeyDistinctVisitor(metaData, indexTypes, planContext.commonPrimaryKey));
    @Nullable RecordQueryPlan withoutFetch = RecordQueryPlannerSubstitutionVisitor.removeIndexFetch(metaData, indexTypes, planContext.commonPrimaryKey, chosenPlan, resultFields);
    return withoutFetch == null ? chosenPlan : withoutFetch;
}