private Tuple <string, bool> GetAppropriateIndexToQuery(string entityName, IndexQuery query, DynamicQueryMapping map)
{
var appropriateIndex = new DynamicQueryOptimizer(documentDatabase).SelectAppropriateIndex(entityName, query);
if (appropriateIndex.MatchType == DynamicQueryMatchType.Complete)
{
map.IndexName = appropriateIndex.IndexName;
return(Tuple.Create(appropriateIndex.IndexName, false));
}
else if (appropriateIndex.MatchType == DynamicQueryMatchType.Partial)
{
// At this point, we found an index that has some fields we need and
// isn't incompatible with anything else we're asking for
// We need to clone that other index
// We need to add all our requested indexes information to our cloned index
// We can then use our new index instead
var currentIndex = documentDatabase.IndexDefinitionStorage.GetIndexDefinition(appropriateIndex.IndexName);
map.AddExistingIndexDefinition(currentIndex, documentDatabase, query);
}
return(CreateAutoIndex(map.IndexName, map.CreateIndexDefinition));
}