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This view is designed along the same lines as pg_file_settings, to wit it shows what is currently in the file, not what the postmaster has loaded as the active settings. That allows it to be used to pre-vet edits before issuing SIGHUP. As with the earlier view, go out of our way to allow errors in the file to be reflected in the view, to assist that use-case. (We might at some point invent a view to show the current active settings, but this is not that patch; and it's not trivial to do.) Haribabu Kommi, reviewed by Ashutosh Bapat, Michael Paquier, Simon Riggs, and myself Discussion: https://postgr.es/m/CAJrrPGerH4jiwpcXT1-46QXUDmNp2QDrG9+-Tek_xC8APHShYw@mail.gmail.com
52 lines
2.2 KiB
SQL
52 lines
2.2 KiB
SQL
--
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-- Test assorted system views
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--
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-- This test is mainly meant to provide some code coverage for the
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-- set-returning functions that underlie certain system views.
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-- The output of most of these functions is very environment-dependent,
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-- so our ability to test with fixed expected output is pretty limited;
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-- but even a trivial check of count(*) will exercise the normal code path
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-- through the SRF.
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select count(*) >= 0 as ok from pg_available_extension_versions;
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select count(*) >= 0 as ok from pg_available_extensions;
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-- At introduction, pg_config had 23 entries; it may grow
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select count(*) > 20 as ok from pg_config;
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-- We expect no cursors in this test; see also portals.sql
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select count(*) = 0 as ok from pg_cursors;
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select count(*) >= 0 as ok from pg_file_settings;
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-- There will surely be at least one rule
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select count(*) > 0 as ok from pg_hba_file_rules;
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-- There will surely be at least one active lock
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select count(*) > 0 as ok from pg_locks;
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-- We expect no prepared statements in this test; see also prepare.sql
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select count(*) = 0 as ok from pg_prepared_statements;
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-- See also prepared_xacts.sql
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select count(*) >= 0 as ok from pg_prepared_xacts;
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-- This is to record the prevailing planner enable_foo settings during
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-- a regression test run.
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select name, setting from pg_settings where name like 'enable%';
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-- Test that the pg_timezone_names and pg_timezone_abbrevs views are
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-- more-or-less working. We can't test their contents in any great detail
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-- without the outputs changing anytime IANA updates the underlying data,
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-- but it seems reasonable to expect at least one entry per major meridian.
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-- (At the time of writing, the actual counts are around 38 because of
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-- zones using fractional GMT offsets, so this is a pretty loose test.)
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select count(distinct utc_offset) >= 24 as ok from pg_timezone_names;
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select count(distinct utc_offset) >= 24 as ok from pg_timezone_abbrevs;
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-- Let's check the non-default timezone abbreviation sets, too
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set timezone_abbreviations = 'Australia';
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select count(distinct utc_offset) >= 24 as ok from pg_timezone_abbrevs;
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set timezone_abbreviations = 'India';
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select count(distinct utc_offset) >= 24 as ok from pg_timezone_abbrevs;
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