# Questions Regarding Deleting Source Data After Transform

**URL:** https://discuss.elastic.co/t/questions-regarding-deleting-source-data-after-transform/279353
**Category:** Elasticsearch
**Tags:** transforms
**Created:** [July 22, 2021, 8:02am UTC](https://discuss.elastic.co/t/questions-regarding-deleting-source-data-after-transform/279353 "2021-07-22T08:02:03Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![Hendrik\_Muhs](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/hendrik_muhs/32/25802_2.png) [@Hendrik\_Muhs](https://discuss.elastic.co/u/Hendrik_Muhs)
#### Post date: [August 6, 2021, 2:23pm UTC](https://discuss.elastic.co/t/questions-regarding-deleting-source-data-after-transform/279353/6 "2021-08-06T14:23:42Z")

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yes, that's right.

Note that for the 2nd continuous transform you need a timestamp field to `sync` on. You can use the timestamp from the daily bucket, however in this case the `delay` for the 2nd transform needs to be `24h` + the delay of the 1st transform. If that's to slow for you, you can either configure the 1st transform with a lower interval or you add an ingest timestamp using an ingest pipeline.

See: [Dec 12th, 2018: [EN][Elasticsearch] Automatically adding a timestamp to documents](https://discuss.elastic.co/t/dec-12th-2018-en-elasticsearch-automatically-adding-a-timestamp-to-documents/159314)

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