Examples with OptimizedType com.baidu.hugegraph.backend.query.ConditionQuery.OptimizedType used on opensource projects

Example 1 with OptimizedType

use of com.baidu.hugegraph.backend.query.ConditionQuery.OptimizedType in project incubator-hugegraph by apache.

the class GraphTransaction method queryNumber.

@Override
public Number queryNumber(Query query) {
    E.checkArgument(!this.hasUpdate(), "It's not allowed to query number when " + "there are uncommitted records.");
    if (!(query instanceof ConditionQuery)) {
        return super.queryNumber(query);
    }
    Aggregate aggregate = query.aggregateNotNull();
    QueryList<Number> queries = this.optimizeQueries(query, q -> {
        boolean indexQuery = q.getClass() == IdQuery.class;
        OptimizedType optimized = ((ConditionQuery) query).optimized();
        Number result;
        if (!indexQuery) {
            result = super.queryNumber(q);
        } else {
            E.checkArgument(aggregate.func() == AggregateFunc.COUNT, "The %s operator on index is not supported now", aggregate.func().string());
            if (this.optimizeAggrByIndex && optimized == OptimizedType.INDEX) {
                // The ids size means results count (assume no left index)
                result = q.idsSize();
            } else {
                assert optimized == OptimizedType.INDEX_FILTER || optimized == OptimizedType.INDEX;
                assert q.resultType().isVertex() || q.resultType().isEdge();
                result = IteratorUtils.count(q.resultType().isVertex() ? this.queryVertices(q) : this.queryEdges(q));
            }
        }
        return new QueryResults<>(IteratorUtils.of(result), q);
    });
    QueryResults<Number> results = queries.empty() ? QueryResults.empty() : queries.fetch(this.pageSize);
    return aggregate.reduce(results.iterator());
}