# Multi Document Search in the Same Index
**URL:** https://discuss.elastic.co/t/multi-document-search-in-the-same-index/246888
**Category:** Elasticsearch
**Created:** [August 30, 2020, 6:06pm UTC](https://discuss.elastic.co/t/multi-document-search-in-the-same-index/246888 "2020-08-30T18:06:57Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@ShashikanthKomandoor](https://discuss.elastic.co/u/ShashikanthKomandoor)
#### Post date: [August 30, 2020, 6:06pm UTC](https://discuss.elastic.co/t/multi-document-search-in-the-same-index/246888/1 "2020-08-30T18:06:57Z")
Hi Team,
I am pushing the /var/log/maillog to ELK Stack version 6.X
I was able to use the postfix grok filters available in github and create the indices, documents, fields and so and also I am able to see in Kibana too.
I am capturing the header message id in the /var/log/maillog which is being pushed to ELK.
I want to know through ELK searches that the message ids which got successfully sent, deferred and softbounce.
Here I faced the challenge of writing the query of search for the above requirement as the header message id is recorded in /var/log/maillog in one line while the delivery status would be recorded in a different line.
As per my understanding, each record or each line in the log file is called as a document in an Index. Correct me if I am wrong.
So, is there a way that would solve my requirement ? This has become a great challenge from past few days for me.
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [August 31, 2020, 2:03am UTC](https://discuss.elastic.co/t/multi-document-search-in-the-same-index/246888/2 "2020-08-31T02:03:47Z")
> [@ShashikanthKomandoor](#):
>
> As per my understanding, each record or each line in the log file is called as a document in an Index. Correct me if I am wrong.
Yes, that's correct 🙂
[Transforming data | Elasticsearch Guide [7.9] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/7.9/transforms.html) should be able to do what you want. Basically you want to create an entity-centric index, where the entity is the unique postfix ID.
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### Author:  [@ShashikanthKomandoor](https://discuss.elastic.co/u/ShashikanthKomandoor)
#### Post date: [August 31, 2020, 8:48am UTC](https://discuss.elastic.co/t/multi-document-search-in-the-same-index/246888/3 "2020-08-31T08:48:33Z")
Thank you Warkolm for your immediate response. I am new to this concept of Transforming Data. Let me first study this and come back to you if any queries.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [September 28, 2020, 8:48am UTC](https://discuss.elastic.co/t/multi-document-search-in-the-same-index/246888/4 "2020-09-28T08:48:43Z")
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