Transform API plugins - Groupings

[briannn97]

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):

v2.4

Describe the issue:

Hi,
I’m new to opensearch and am trying to use groupings array in transform api, one of the groupings is using date_histogram as shown in the screenshot. However, the field is timeStamp cant be found to be used as grouping criteria, “timeStamp” field is shown in the index screenshot below.

Can anyone advise on this?

Thanks.

Configuration:

Relevant Logs or Screenshots:

[briannn97]

As you can see, the timeStamp field exists in the index itself.

[briannn97]

Hi,

Can anyone help on this?