Re: - Mailing list pgsql-general

Create the functions:

CREATE FUNCTION pg_catalog.text(integer) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(int4out($1));';
CREATE CAST (integer AS text) WITH FUNCTION pg_catalog.text(integer) AS IMPLICIT;

http://www.rummandba.com/2010/10/migrate-database-from-postgresql-81-to.html

It'll work.

On Wed, May 15, 2013 at 3:17 PM, Carlos Henrique Reimer <carlos.reimer@opendb.com.br> wrote:

Hi,

Currently, our application is still using PG 8.2 and we are trying to use 9.2 but there are some problems related with the implicit casts removed on 8.3.

Example:

1) select 'teste'||1;
2) select trim(1);

Select 1 & 2 does run fine on 8.2 but in 9.2 select 1 is ok and select 2 got an error due the fact implicit cast were removed on PG 8.3:

ERROR:  function pg_catalog.btrim(integer) does not exist
LINE 1: select trim(1);
               ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.

********** Error **********

ERROR: function pg_catalog.btrim(integer) does not exist
SQL state: 42883
Hint: No function matches the given name and argument types. You might need to add explicit type casts.
Character: 8

Recreated the implicit cast for select 2:

CREATE FUNCTION pg_catalog.text(integer) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(int4out($1));';
CREATE CAST (integer AS text) WITH FUNCTION pg_catalog.text(integer) AS IMPLICIT;

Now select 2 works fine but select 1 gets an error:

ERROR:  operator is not unique: unknown || integer
LINE 1: select 'teste'||1;
                      ^
HINT:  Could not choose a best candidate operator. You might need to add explicit type casts.

********** Error **********

ERROR: operator is not unique: unknown || integer
SQL state: 42725
Hint: Could not choose a best candidate operator. You might need to add explicit type casts.
Character: 15

Is there a way to make both selects work on PG 9.2 without explicit casts?

Thank you in advace!

--
Reimer
47-3347-1724 47-9183-0547 msn: carlos.reimer@opendb.com.br