#17266: psycopg2 backend should use get_parameter_status to check if SET TIME
ZONE
is needed
-------------------------------------+-------------------------------------
Reporter: akaariai | Owner: nobody
Type: | Status: new
Cleanup/optimization | Version:
Component: Database layer | Resolution:
(models, ORM) | Triage Stage: Accepted
Severity: Normal | Needs documentation: 0
Keywords: | Patch needs improvement: 0
Has patch: 1 | UI/UX: 0
Needs tests: 0 |
Easy pickings: 0 |
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Comment (by akaariai):
I have tested this on psycopg 2.0.1, which does not work at all with
Django (unrelated to this ticket - expects port as an integer), psycopg2
2.0.7 - works, psycopg2 2.0.11 - works, psycopg 2.3.2 works and finally
the current psycopg 2.4.2 - works. Results in above post are with 2.4.2.
In no case did the patch result in worse behavior. If get_parameter_status
is not available, the patch doesn't change anything for new connections.
If it is available, and time zone is correct for the connection, you can
get rid of 3 non-necessary queries.
My opinion is that the patch is ready for committer. A summary for
reviewer / committer:
- Please review the documentation changes with extra care. Writing
documentation is not my strongest area...
- The patch will get rid of all non-necessary queries for new
connections when settings for the connection are correct (in
postgresql.conf or for the user). The documentation mentions the necessary
changes to connection settings.
- The patch should work with all supported psycopg2 versions.
- There are no tests, as there is no easy way to test what queries
psycopg2 has actually executed. See above post for how to test this
manually.
--
Ticket URL: <https://code.djangoproject.com/ticket/17266#comment:3>
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