# Operations over indexed documents **URL:** \ **Category:** Elasticsearch\ **Created:** [March 31, 2023, 3:53pm UTC](https://discuss.elastic.co/t/operations-over-indexed-documents/329068 "2023-03-31T15:53:56Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![tmslara.a](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tmslara.a/32/116339_2.png) [@tmslara.a](https://discuss.elastic.co/u/tmslara.a)\ **Post date:** [March 31, 2023, 3:53pm UTC](https://discuss.elastic.co/t/operations-over-indexed-documents/329068/1 "2023-03-31T15:53:56Z")
Hi, Is it possible to compute variables taking the documents from an index as input? I will describe my current situation and my objective. I have data indexed on an Elasticsearch cluster. My data contains a timestamp and a set of numeric values and identifiers. I'm currently running operations over my data using Python and the Eland library. I perform operations mainly selecting time windows and checking the existence of certain data to compute numeric values. As I run my script and compute my metrics I'm indexing this computed values on a new index on the cluster. I want to know if it is possible to do something similar using Elasticsearch and/or Kibana. Is it possible to run a script over the data of my index and store the results in a new index. I think about it as a reindexing process, running the computation over the complete index to get the results and store them in a new index. The ideal case would be to compute my metrics as I index the data in the index. However, I also don't know if it is possible. Best regards, ---
**Author:** ![stephenb](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/stephenb/32/40856_2.png) [@stephenb](https://discuss.elastic.co/u/stephenb)\ **Post date:** [April 1, 2023, 1:21am UTC](https://discuss.elastic.co/t/operations-over-indexed-documents/329068/2 "2023-04-01T01:21:09Z")
Hi @tmslara.a Perhaps look at transforms... sound a lot like what you are trying to do. > **[Transform overview | Elasticsearch Guide \[8.7\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/8.7/transform-overview.html)** ---
**Author:** ![tmslara.a](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tmslara.a/32/116339_2.png) [@tmslara.a](https://discuss.elastic.co/u/tmslara.a)\ **Post date:** [April 3, 2023, 3:39pm UTC](https://discuss.elastic.co/t/operations-over-indexed-documents/329068/3 "2023-04-03T15:39:39Z")
Thank you. I will read about it ---
**Author:** ![tmslara.a](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tmslara.a/32/116339_2.png) [@tmslara.a](https://discuss.elastic.co/u/tmslara.a)\ **Post date:** [April 3, 2023, 4:02pm UTC](https://discuss.elastic.co/t/operations-over-indexed-documents/329068/4 "2023-04-03T16:02:24Z")
I checked transformations. I need to do more complex operations than aggregations. More like selecting data an run scripts. ---
**Author:** ![stephenb](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/stephenb/32/40856_2.png) [@stephenb](https://discuss.elastic.co/u/stephenb)\ **Post date:** [April 3, 2023, 4:27pm UTC](https://discuss.elastic.co/t/operations-over-indexed-documents/329068/5 "2023-04-03T16:27:41Z")
> [@tmslara.a](#): > > I need to do more complex operations than aggregations. More like selecting data an run scripts. Understood... Did you see that you can [run painless scripts as part of the transformation](https://www.elastic.co/guide/en/elasticsearch/reference/current/transform-painless-examples.html)... probably still not enough but just in case you missed it. Many users use the data tool/language of their choice like python to do large-scale / complex processing. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 1, 2023, 4:28pm UTC](https://discuss.elastic.co/t/operations-over-indexed-documents/329068/6 "2023-05-01T16:28:36Z")
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