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Problems.

Polars upgrades break working setups

Outages and change3 posts from 3 people2d active+00 posts in the last 7 days, 0 the 7 days before (fading)

Posts per day

Posts per day3 posts, Sep 3 to Sep 25

The posts behind it

3, newest first
PostDate
`read_database` silently ignores `schema_overrides` for Arrow-based drivers### Checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars. ### Reproducible example ### Log output ### Issue description `schema_overrides` is silently...pola-rs/polarsMariusMerkleQCSep 102 weeks ago
Performance regression in `pl.all().fill_nan(None)`### Checks - [x] I have checked that this issue has not already been reported. - [x] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars. ### Reproducible example ### Log output ### Issue description It seems there is a regression...pola-rs/polarsfsimkovicSep 102 weeks ago
`Map` dtype followupsIn https://github.com/pola-rs/polars/pull/28984 we added basic support for the `Map` dtype, but we left a couple of follow-ups that should be done after the initial PR is merged.pola-rs/polarsdancsiSep 33 weeks ago

Companies and products named

Company or productPosts naming it
Polars3
PyPI2
GitHub1
About this problem

Evidence

3 posts from 3 people in 1 place, about 2 a week over 8 days. Mostly on pola-rs/polars. Tools named alongside: PyPI, GitHub.

Frustration Frustration 0 of 3· Seen on GitHub issues

How it was grouped

Posts that state a pain and match the "breaking-changes" rule about Polars. First post Sep 3, 2026, latest Sep 10, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method

History

  • 2026-09-25 Added: Polars upgrades break working setups (3 posts)

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