On Mon, Mar 09, 2009 at 10:03:34AM -0500, Kevin Grittner wrote: > >>> Kyle Butt <kyleb...@gmail.com> wrote: > > > select (bug_function()).*; > > > psql:sql/bug_example.sql:32: NOTICE: in bug_function > > psql:sql/bug_example.sql:32: NOTICE: in bug_function > > psql:sql/bug_example.sql:32: NOTICE: in bug_function > > psql:sql/bug_example.sql:32: NOTICE: in bug_function > > psql:sql/bug_example.sql:32: NOTICE: in bug_function > > psql:sql/bug_example.sql:32: NOTICE: in bug_function > > psql:sql/bug_example.sql:32: NOTICE: in bug_function > > psql:sql/bug_example.sql:32: NOTICE: in bug_function > > psql:sql/bug_example.sql:32: NOTICE: in bug_function > > psql:sql/bug_example.sql:32: NOTICE: in bug_function > > a | b | c | d | e | f | g | h | i | j > > ---+---+---+---+---+---+---+---+---+--- > > 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 > > (1 row) > > For completeness: > > cir=# select * from bug_function(); > NOTICE: in bug_function > a | b | c | d | e | f | g | h | i | j > ---+---+---+---+---+---+---+---+---+--- > 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 > (1 row) > > -Kevin
I noticed that it has to do with the volatility. If I declare the function as
stable (which it is) then it's executed multiple times. If I declare it as
volatile, it's only executed once.
I'm more interested in something like the following (output placed inline):
create function bug_function_2 (j_p integer) returns composite_types_test
volatile
language plpgsql
as $$
declare r composite_types_test;
begin
select * into r from composite_types_test where j = j_p;
raise notice 'in bug_function_2';
return r;
end;
$$;
select (bf2).* from (
select bug_function_2(j) as bf2 from composite_types_test
) as foo;
psql:sql/bug_example.sql:54: NOTICE: in bug_function_2
a | b | c | d | e | f | g | h | i | j
---+---+---+---+---+---+---+---+---+---
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
(1 row)
create or replace function bug_function_2 (j_p integer) returns
composite_types_test
stable
language plpgsql
as $$
declare r composite_types_test;
begin
select * into r from composite_types_test where j = j_p;
raise notice 'in bug_function_2';
return r;
end;
$$;
select (bf2).* from (
select bug_function_2(j) as bf2 from composite_types_test
) as foo;
psql:sql/bug_example.sql:70: NOTICE: in bug_function_2
psql:sql/bug_example.sql:70: NOTICE: in bug_function_2
psql:sql/bug_example.sql:70: NOTICE: in bug_function_2
psql:sql/bug_example.sql:70: NOTICE: in bug_function_2
psql:sql/bug_example.sql:70: NOTICE: in bug_function_2
psql:sql/bug_example.sql:70: NOTICE: in bug_function_2
psql:sql/bug_example.sql:70: NOTICE: in bug_function_2
psql:sql/bug_example.sql:70: NOTICE: in bug_function_2
psql:sql/bug_example.sql:70: NOTICE: in bug_function_2
psql:sql/bug_example.sql:70: NOTICE: in bug_function_2
a | b | c | d | e | f | g | h | i | j
---+---+---+---+---+---+---+---+---+---
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
(1 row)
pgp14VQyCfZfa.pgp
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