-- -- Cache-behavior-dependent test cases -- -- These tests logically belong in plpgsql_record.sql, and perhaps someday -- can be merged back into it. For now, however, their results are different -- depending on debug_discard_caches, so we must have two expected-output -- files to cover both cases. To minimize the maintenance effort resulting -- from that, this file should contain only tests that do have different -- results under debug_discard_caches. --
-- check behavior with changes of a named rowtype createtable c_mutable(f1 int, f2 text);
create function c_sillyaddone(int) returns int language plpgsql as
$$ declare r c_mutable; begin r.f1 := $1; return r.f1 + 1; end $$; select c_sillyaddone(42);
altertable c_mutable dropcolumn f1; altertable c_mutable addcolumn f1 float8;
-- currently, this fails due to cached plan for "r.f1 + 1" expression -- (but if debug_discard_caches is on, it will succeed) select c_sillyaddone(42);
-- but it's OK if we force plan rebuilding
discard plans; select c_sillyaddone(42);
-- check behavior with changes in a record rowtype create function show_result_type(text) returns text language plpgsql as
$$ declare
r record;
t text;
begin
execute $1into r; select pg_typeof(r.a) into t; return format('type %s value %s', t, r.a::text);
end;
$$;
select show_result_type('select 1 as a'); -- currently this fails due to cached plan for pg_typeof expression -- (but if debug_discard_caches is on, it will succeed) select show_result_type('select 2.0 as a');
-- but it's OK if we force plan rebuilding
discard plans; select show_result_type('select 2.0 as a');
Messung V0.5 in Prozent
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(vorverarbeitet am 2026-08-08)
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