microsoft / microsoft/mssql-python

Must APP be a reserved keyword in connection strings?

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#484 5 comments 3 reactions 1 assignee View on GitHub

@sumitmsft is already working on this.

Since Apr 9, 2026.

area: connectivity-auth enhancement inADO
Dominant language
Python
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Description

Hi, the library currently enforces APP as a reserved keyword in connection strings https://github.com/microsoft/mssql-python/wiki/Connection-to-SQL-Database#reserved-connection-string-keywords

Is there a good reason for this? I don't see any justification in the PR https://github.com/microsoft/mssql-python/commit/8ed531e5161fbae39debf29b8e89363b1efaca31 (although there is reference to docs/connection_string_allow_list_design.md which I cannot find)

We use currently use APP internally for passing application names and find it quite useful!

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