The index to use for the aggregation. The index is on the initial
collection / view against which the aggregation is run.
The hint does not apply to $lookup and $graphLookup stages.
Specify the index either by the index name as a string or the index key
pattern. If specified, then the query system will only consider plans
using the hinted index.
The index to use for the aggregation. The index is on the initial collection / view against which the aggregation is run.
The hint does not apply to $lookup and $graphLookup stages.
Specify the index either by the index name as a string or the index key pattern. If specified, then the query system will only consider plans using the hinted index.