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Merge pull request #1331 from opensafely/steve/emis-delay-warning
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Add warning on EMIS delay to `data-sources/emis`
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StevenMaude authored Sep 12, 2023
2 parents 7913aad + 60cc372 commit 21ad0a1
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10 changes: 4 additions & 6 deletions docs/data-sources/emis.md
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!!! warning
This section is a work in progress.
EMIS support is currently under development.
Research access to the backend provided by EMIS is temporarily unavailable,
pending funding arrangements between NHS England and EMIS.
When funding has been secured,
we will publish a timeline for gradually reopening access.

## OpenSAFELY-EMIS database builds

At present, EMIS support is enabled for some, but not all, users.
This is because not all study definitions can run against the EMIS backend.
There is a [document with more explanation about running studies in EMIS](https://docs.google.com/document/d/1KeToM9gjIKDSyNh_H4M6TWU_xv5yHrkko2bwgOrFsac/edit) (internal only).

When EMIS receive data from external data sources (eg ONS), records are appended to the
relevant tables, not updated. The relevant tables have an `upload_date` column, and to get the latest data, we have to query for on `upload_date`.

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