90 lines
3.7 KiB
PL/PgSQL
90 lines
3.7 KiB
PL/PgSQL
--
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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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-- The entire output of pg_backend_memory_contexts is not stable,
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-- we test only the existence and basic condition of TopMemoryContext.
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select name, ident, parent, level, total_bytes >= free_bytes
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from pg_backend_memory_contexts where level = 0;
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-- We can exercise some MemoryContext type stats functions. Most of the
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-- column values are too platform-dependant to display.
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-- Ensure stats from the bump allocator look sane. Bump isn't a commonly
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-- used context, but it is used in tuplesort.c, so open a cursor to keep
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-- the tuplesort alive long enough for us to query the context stats.
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begin;
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declare cur cursor for select left(a,10), b
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from (values(repeat('a', 512 * 1024),1),(repeat('b', 512),2)) v(a,b)
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order by v.a desc;
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fetch 1 from cur;
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select name, parent, total_bytes > 0, total_nblocks, free_bytes > 0, free_chunks
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from pg_backend_memory_contexts where name = 'Caller tuples';
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rollback;
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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, with no errors.
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select count(*) > 0 as ok, count(*) FILTER (WHERE error IS NOT NULL) = 0 AS no_err
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from pg_hba_file_rules;
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-- There may be no rules, and there should be no errors.
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select count(*) >= 0 as ok, count(*) FILTER (WHERE error IS NOT NULL) = 0 AS no_err
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from pg_ident_file_mappings;
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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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-- There will surely be at least one SLRU cache
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select count(*) > 0 as ok from pg_stat_slru;
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-- There must be only one record
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select count(*) = 1 as ok from pg_stat_wal;
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-- We expect no walreceiver running in this test
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select count(*) = 0 as ok from pg_stat_wal_receiver;
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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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-- There are always wait event descriptions for various types.
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select type, count(*) > 0 as ok FROM pg_wait_events
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group by type order by type COLLATE "C";
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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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