Re: BUG #6299: pg_dump, pg_dumpall - Problem with the order of backup functions

On 11/19/2011 12:19 AM, lindebg(at)gmail(dot)com wrote:
> Thanks, in this case works :-) However, this does not solve all cases.
> Unlikely, but possible to create, cyclic case can not be restored:
>

Another example with more functions:

$ psql

create database test;

\connect test

create function fn1(param1 int)
returns int as
$$ select $1 $$
language sql immutable;

create function fn2(param1 int default fn1(8))
returns int as
$$ select $1 $$
language sql immutable;

create function fn3(param1 int default fn2(5))
returns int as
$$ select $1 $$
language sql immutable;

create or replace function fn1(param1 int default fn3(3))
returns int as
$$ select $1 $$
language sql immutable;

\df
List of functions
Schema | Name | Result data type | Argument data types | Type
--------+------+------------------+-------------------------------+--------
public | fn1 | integer | param1 integer DEFAULT fn3(3) | normal
public | fn2 | integer | param1 integer DEFAULT fn1(8) | normal
public | fn3 | integer | param1 integer DEFAULT fn2(5) | normal
(3 rows)

\q

$ pg_dump -F c test > test.backup
pg_dump: [sorter] WARNING: could not resolve dependency loop among these
items:
pg_dump: [sorter] FUNCTION fn2 (ID 173 OID 16403)
pg_dump: [sorter] FUNCTION fn1 (ID 175 OID 16402)
pg_dump: [sorter] FUNCTION fn3 (ID 174 OID 16404)

$ psql -c "drop database test"
$ psql -c "create database test"

$ pg_restore -d test test.backup
pg_restore: [archiver (db)] Error while PROCESSING TOC:
pg_restore: [archiver (db)] Error from TOC entry 173; 1255 16403
FUNCTION fn2(integer) postgres
pg_restore: [archiver (db)] could not execute query: ERROR: function
fn1(integer) does not exist
LINE 1: CREATE FUNCTION fn2(param1 integer DEFAULT fn1(8)) RETURNS i...
^
HINT: No function matches the given name and argument types. You might
need to add explicit type casts.
Command was: CREATE FUNCTION fn2(param1 integer DEFAULT fn1(8))
RETURNS integer
LANGUAGE sql IMMUTABLE
AS $_$ select $1 $_$;

pg_restore: [archiver (db)] could not execute query: ERROR: function
public.fn2(integer) does not exist
Command was: ALTER FUNCTION public.fn2(param1 integer) OWNER TO
postgres;

pg_restore: [archiver (db)] Error from TOC entry 174; 1255 16404
FUNCTION fn3(integer) postgres
pg_restore: [archiver (db)] could not execute query: ERROR: function
fn2(integer) does not exist
LINE 1: CREATE FUNCTION fn3(param1 integer DEFAULT fn2(5)) RETURNS i...
^
HINT: No function matches the given name and argument types. You might
need to add explicit type casts.
Command was: CREATE FUNCTION fn3(param1 integer DEFAULT fn2(5))
RETURNS integer
LANGUAGE sql IMMUTABLE
AS $_$ select $1 $_$;

pg_restore: [archiver (db)] could not execute query: ERROR: function
public.fn3(integer) does not exist
Command was: ALTER FUNCTION public.fn3(param1 integer) OWNER TO
postgres;

pg_restore: [archiver (db)] Error from TOC entry 175; 1255 16402
FUNCTION fn1(integer) postgres
pg_restore: [archiver (db)] could not execute query: ERROR: function
fn3(integer) does not exist
LINE 1: CREATE FUNCTION fn1(param1 integer DEFAULT fn3(3)) RETURNS i...
^
HINT: No function matches the given name and argument types. You might
need to add explicit type casts.
Command was: CREATE FUNCTION fn1(param1 integer DEFAULT fn3(3))
RETURNS integer
LANGUAGE sql IMMUTABLE
AS $_$ select $1 $_$;

pg_restore: [archiver (db)] could not execute query: ERROR: function
public.fn1(integer) does not exist
Command was: ALTER FUNCTION public.fn1(param1 integer) OWNER TO
postgres;

WARNING: errors ignored on restore: 6

$ psql test

\df
List of functions
Schema | Name | Result data type | Argument data types | Type
--------+------+------------------+---------------------+------
(0 rows)