Re: [ psql - review request ] review request for \d+ tablename, \d+ indexname indenting

From: Cary Huang <cary(dot)huang(at)highgo(dot)ca>
To: pgsql-hackers(at)lists(dot)postgresql(dot)org
Cc: team querytricks <querytricks2023(at)gmail(dot)com>
Subject: Re: [ psql - review request ] review request for \d+ tablename, \d+ indexname indenting
Date: 2023-08-25 21:00:43
Message-ID: 169299724318.1124.9460604214314629998.pgcf@coridan.postgresql.org
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The following review has been posted through the commitfest application:
make installcheck-world: tested, failed
Implements feature: not tested
Spec compliant: not tested
Documentation: not tested

Hello

Thank you for the patch and the effort to enhance \d+ 's output on partitioned tables that contain sub-partitions. However, the patch does not apply and I notice that this patch is generated as a differ file from 2 files, describe.c and describe_change.c. You should use git diff to generate a patch rather than maintaining 2 files yourself. Also I noticed that you include a "create_object.sql" file to illustrate the feature, which is not necessary. Instead, you should add them as a regression test cases in the existing regression test suite under "src/test/regress", so these will get run as tests to illustrate the feature. This patch changes the output of \d+ and it could potentially break other test cases so you should fix them in the patch in addition to providing the feature

Now, regarding the feature, I see that you intent to print the sub partitions' partitions in the output, which is okay in my opinion. However, a sub-partition can also contain another sub-partition, which contains another sub-partition and so on. So it is possible that sub-partitions can span very, very deep. Your example assumes only 1 level of sub-partitions. Are you going to print all of them out in \d+? If so, it would definitely cluster the output so much that it starts to become annoying. Are you planning to set a limit on how many levels of sub-partitions to print or just let it print as many as it needs?

thank you

Cary Huang
-----------------------
Highgo Software Canada
www.highgo.ca

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