Dependencies: Update to psycopg>=3.0

[sphuber]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 86.66667% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 95.05%. Comparing base (7a05bbc) to head (69c19b8).

Files	Patch %	Lines
pgsu/__init__.py	86.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #38      +/-   ##
==========================================
- Coverage   96.00%   95.05%   -0.95%     
==========================================
  Files           2        2              
  Lines         175      182       +7     
==========================================
+ Hits          168      173       +5     
- Misses          7        9       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[sphuber]

@danielhollas I have tested this in the field with aiida-core by installing from this branch. The tests now pass: aiidateam/aiida-core#6362
Do you still want to give this a look? or can I go ahead and merge and release this.

[danielhollas]

Erm, I guess I don't remember some previous discussion about this? : 😅 Gave this a quick look and LGTM. Do I understand correctly that the changes here are backwards compatible?

[sphuber]

Erm, I guess I don't remember some previous discussion about this?

There hasn't been :D Just that there is an open issue on aiida-core to consider moving to psycopg v3 which was released in 2021. I cannot find any mention of a timeline for the end-of-life of psycopg2 but it is bound to happen some time. Unfortunately psycopg2 and psycopg are not compatible. It may be possible to make this library compatible with both at the same time, but probably not trivial and don't feel like investing the time. sqlalchemy also treats them as two separate dialects since they are different enough.

So the plan is just to release this change as v0.3.0 which will only support psycopg. There will need to be some work done in aiida-core still to fix the engine connection string. In sqlalchemy, the default is postgres:// which is an alias for postgres+psycopg2:// which is the default. To switch to psycopg, we need to use postgres+psycopg://. But first I just wanted to make sure that the implementation runs against aiida-core, which seems to be the case. Once I have the release, I will deal with the migration part.