private IGraphQueryStep BuildQueryPlanForMatchNode(MatchPath node)
{
var alias = node.Alias;
if (GraphQuery.WithDocumentQueries.TryGetValue(alias, out var query) == false)
{
throw new InvalidOperationException($"BuildQueryPlanForMatchVertex was invoked for allias='{alias}' which is supposed to be a node but no corresponding WITH clause was found.");
}
// TODO: we can tell at this point if it is a collection query or not,
// TODO: in the future, we want to build a diffrent step for collection queries in the future.
var queryMetadata = new QueryMetadata(query.withQuery, _query.QueryParameters, 0, addSpatialProperties: false);
var qqs = new QueryQueryStep(_database.QueryRunner, alias, query.withQuery, queryMetadata, _query.QueryParameters, _context, _resultEtag, this, _token)
{
CollectIntermediateResults = CollectIntermediateResults
};
var key = qqs.GetQueryString;
//We only want to cache queries that are not unique so we count them during their creation
if (IdenticalQueriesCount.TryGetValue(key, out var count))
{
count.Value += 1;
}
else
{
IdenticalQueriesCount.Add(key, new Reference <int>()
{
Value = 1
});
}
return(qqs);
}
public override IGraphQueryStep VisitQueryQueryStep(QueryQueryStep qqs)
{
_token.ThrowIfCancellationRequested();
if (_isVisitingRight && qqs.CanBeConsideredForDestinationOptimization)
{
return(QueryQueryStep.ToCollectionDestinationQueryStep(_documentsStorage, qqs, _token));
}
return(qqs);
}
public override void VisitQueryQueryStep(QueryQueryStep qqs)
{
_writer.WriteStartObject();
_writer.WritePropertyName("Type");
_writer.WriteString("QueryQueryStep");
_writer.WriteComma();
_writer.WritePropertyName("Query");
_writer.WriteString(qqs.Query.ToString());
_writer.WriteComma();
WriteIntermidiateResults(qqs.IntermediateResults);
_writer.WriteEndObject();
}
public override void VisitQueryQueryStep(QueryQueryStep qqs)
{
var name = qqs.GetIndexName;
if (name.IsNullOrWhiteSpace() == false)
{
Indexes.Add(name);
}
else
{
QueryStepsWithoutExplicitIndex.Add(qqs);
}
}
public virtual IGraphQueryStep VisitQueryQueryStep(QueryQueryStep qqs)
{
_token.ThrowIfCancellationRequested();
return(qqs);
}
public static CollectionDestinationQueryStep ToCollectionDestinationQueryStep(DocumentsStorage documentsStorage, QueryQueryStep qqs, OperationCancelToken token)
{
return(new CollectionDestinationQueryStep(qqs._alias, qqs._queryContext.Documents, documentsStorage, qqs._queryMetadata.CollectionName, token));
}
public virtual void VisitQueryQueryStep(QueryQueryStep qqs)
{
}