How to use store comma separated values in elastic search column?

I have comma separated values in one column and i want to use that column in elastic search.
Mapping created with Nested type.

Below is mapping :
e.g

"mapping": {
"doctype": {
"type": "nested",
"properties": {
"d": {
"type": "short"
}
}
}

After created index and Inserted data, i found some warning with that column.

image

So i want to know is there any issue with mapping? or it will create any issue in future? or is there best way to store this type of values?

Thanks

Hi KrishK
I am also searching solution for this topic

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