Re: [HACKERS] Re: issue: record or row variable cannot be part of multiple-item INTO list

"David G. Johnston" <david.g.johnston@gmail.com> writes:
>> Aside from being inconsistent, it doesn't cover all
>> the cases --- what if you have just one query output column, that is
>> composite, and you'd like it to go into a composite variable?  That
>> doesn't work today, and this patch doesn't fix it, but it does create
>> enough confusion that we never would be able to fix it.

> Actually, this does work, just not the way one would immediately expect.

Uh ... how did you declare ct1, exactly?  I tried this before claiming
it doesn't work, and it doesn't, for me:

create type complex as (r float8, i float8);

create or replace function mkc(a float8, b float8) returns complex
language sql as 'select a,b';

select mkc(1,2);

create or replace function test() returns void language plpgsql as $$
declare c complex;
begin select mkc(1,2) into c; raise notice 'c = %', c;
end$$;

select test();

I get

ERROR:  invalid input syntax for type double precision: "(1,2)"
CONTEXT:  PL/pgSQL function test() line 4 at SQL statement

That's because it's trying to assign the result of mkc() into c.r,
not into the whole composite variable.
        regards, tom lane


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