Min_document_doc in nested aggregations

Elastic Stack Elasticsearch
1

Hi,

I have several aggregations each of which have their own inner
aggregations. It seems that the 'min_document_doc' does not apply when
their containing aggregation is itself empty. I presumed that because both
level of aggregations use 'min_document_doc' there would be buckets for the
inner agg as well.

Can somebody enlighten me on why ES cannot do this, sort of a technical
insight would be appreciated.

Thanks.

Here is a snippet of my query:
...
"aggregations": {
"totalCount": {
"global": {}
},
"categories-missing": {
"terms": {
"field": "categories.missing",
"size": 0,
"min_doc_count": 0,
"order": {
"_term": "asc"
}
}
},
"datasetId": {
"terms": {
"field": "datasetId",
"size": 0,
"min_doc_count": 0,
"order": {
"_term": "asc"
}
},
"aggregations": {
"attributes-Default": {
"terms": {
"field": "attributes.Default",
"size": 0,
"min_doc_count": 0,
"order": {
"_term": "asc"
}
}
},
"attributes-Administrative_information": {
"terms": {
"field": "attributes.Administrative_information",
"size": 0,
"min_doc_count": 0,
"order": {
"_term": "asc"
}
}
},
...

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