docker-library / docker-library/postgres

There is a difference in string comparison between alpine and normal versions

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Description

Ran into https://github.com/docker-library/postgres/issues/851 using postgres:16.1-alpine

In README.md it's said:

Also of note, Alpine-based variants starting with Postgres 15 support ICU locales. Previous Postgres versions based on alpine do not support locales; see "Character sets and locale" in the musl documentation for more details.

As far as I understand, now it should be possible to build the alpine-based image with the correct en-US.UTF-8 collation and have proper string comparison. Or do I miss anything?

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with README.md and the linked PostgreSQL issue to understand the stated Alpine locale limitations and the proposed en-US.UTF-8 collation. Compare string-comparison behavior between the Alpine and normal images, with the work complete when the supported Alpine configuration and its expected behavior are clearly established.

Written by the indexing model from the issue text.

Assessment

Tech stack
docker, postgres
Domain
databases, devops
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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