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--
-- Tests for PL/pgSQL variable properties: CONSTANT, NOT NULL, initializers
--
create type var_record as (f1 int4, f2 int4);
create domain int_nn as int not null;
create domain var_record_nn as var_record not null;
create domain var_record_colnn as var_record check((value).f2 is not null);
-- CONSTANT
do $$
declare x constant int := 42;
begin
raise notice 'x = %', x;
end$$;
do $$
declare x constant int;
begin
x := 42; -- fail
end$$;
do $$
declare x constant int; y int;
begin
for x, y in select 1, 2 loop -- fail
end loop;
end$$;
do $$
declare x constant int[];
begin
x[1] := 42; -- fail
end$$;
do $$
declare x constant int[]; y int;
begin
for x[1], y in select 1, 2 loop -- fail (currently, unsupported syntax)
end loop;
end$$;
do $$
declare x constant var_record;
begin
x.f1 := 42; -- fail
end$$;
do $$
declare x constant var_record; y int;
begin
for x.f1, y in select 1, 2 loop -- fail
end loop;
end$$;
-- initializer expressions
do $$
declare x int := sin(0);
begin
raise notice 'x = %', x;
end$$;
do $$
declare x int := 1/0; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x bigint[] := array[1,3,5];
begin
raise notice 'x = %', x;
end$$;
do $$
declare x record := row(1,2,3);
begin
raise notice 'x = %', x;
end$$;
do $$
declare x var_record := row(1,2);
begin
raise notice 'x = %', x;
end$$;
-- NOT NULL
do $$
declare x int not null; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x int not null := 42;
begin
raise notice 'x = %', x;
x := null; -- fail
end$$;
do $$
declare x int not null := null; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x record not null; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x record not null := row(42);
begin
raise notice 'x = %', x;
x := row(null); -- ok
raise notice 'x = %', x;
x := null; -- fail
end$$;
do $$
declare x record not null := null; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x var_record not null; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x var_record not null := row(41,42);
begin
raise notice 'x = %', x;
x := row(null,null); -- ok
raise notice 'x = %', x;
x := null; -- fail
end$$;
do $$
declare x var_record not null := null; -- fail
begin
raise notice 'x = %', x;
end$$;
-- Check that variables are reinitialized on block re-entry.
do $$
begin
for i in 1..3 loop
declare
x int;
y int := i;
r record;
c var_record;
begin
if i = 1 then
x := 42;
r := row(i, i+1);
c := row(i, i+1);
end if;
raise notice 'x = %', x;
raise notice 'y = %', y;
raise notice 'r = %', r;
raise notice 'c = %', c;
end;
end loop;
end$$;
-- Check enforcement of domain constraints during initialization
do $$
declare x int_nn; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x int_nn := null; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x int_nn := 42;
begin
raise notice 'x = %', x;
x := null; -- fail
end$$;
do $$
declare x var_record_nn; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x var_record_nn := null; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x var_record_nn := row(1,2);
begin
raise notice 'x = %', x;
x := row(null,null); -- ok
x := null; -- fail
end$$;
do $$
declare x var_record_colnn; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x var_record_colnn := null; -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x var_record_colnn := row(1,null); -- fail
begin
raise notice 'x = %', x;
end$$;
do $$
declare x var_record_colnn := row(1,2);
begin
raise notice 'x = %', x;
x := null; -- fail
end$$;
do $$
declare x var_record_colnn := row(1,2);
begin
raise notice 'x = %', x;
x := row(null,null); -- fail
end$$;
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