Tagging fields instead of adding new fields

[yishain11]

Hi everyone!
I have a file with an array of objects, that host information about different fields - what is there value, have this value changed, etc.
For example:

"changedFieldsList": [
    {
      "fieldId": "PK_NEWJOURNAL",
      "fieldType": "NUMBER",
      "fieldValue": "NULL",
      "fieldChanged": "Y"
    },
    {
      "fieldId": "OFFICE",
      "fieldType": "CHAR",
      "fieldValue": "NULL",
      "fieldChanged": "Y"
    },
    {
      "fieldId": "UPDATE_DATE",
      "fieldType": "DATE",
      "fieldValue": "2017-12-07 05:09:54+03:000",
      "fieldChanged": "Y"
    },
...

The problem is that this structure is making aggregation problems because the names of the fields are the same.

If I want to flat the file in order to have unique field names, is there a way to tag a specific field and add metadata to a field so I still can tell if the field have changed or any other useful metadata, without adding new fields?

[yishain11]

Anyone?

[dadoonet (David Pilato)]

Depending on what kind of aggs you want to run, you should better change completely the document (if the number of fields is under 1000).

For example you can't run a date histogram on the text field which represents a date. But if you transform your document you can.

I don't think I understood your proposal though which makes me think that what you proposed is not possible.

[yishain11]

Hi, thanks for the answer.
What I mean is I want to know if a certain field has changed.
Is there a way to tag a field as changed (the same way I tag a document when a condition is met) without adding a new field to the document?