Is ES smart enough to only check documents that are used?

Elastic Stack Elasticsearch
1

Hi,

Not sure if the title is good enough.
I was wondering if ES is smart enough to filter documents by the fields that are used in aggregations or not.

For example, given this query:

{
  "aggs": {
    "bytes": {
      "sum": {
        "field": "bytes"
      }
    }
  }
}

Now lets say I have 1 million documents, some of them have the bytes field, and some don't.

Will the query be faster if I add a range filter with bytes:>0, or will ES know not to query documents that don't have the bytes field in the first place?

2

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