[HACKERS] dblink module printing unnamed connection (with commit acaf7ccb94) - Mailing list pgsql-hackers

From Rushabh Lathia
Subject [HACKERS] dblink module printing unnamed connection (with commit acaf7ccb94)
Date
Msg-id CAGPqQf1WVpyL7Zaoo=u1xNGtaYusABXqbW56hT0SWbA29GmAfQ@mail.gmail.com
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Responses Re: dblink module printing unnamed connection (with commitacaf7ccb94)  (Peter Eisentraut <peter.eisentraut@2ndquadrant.com>)
List pgsql-hackers
Hi All,

DBLINK contrib module started showing :"unnamed" connection name.

Consider the below test:

postgres=# CREATE ROLE alice NOSUPERUSER NOCREATEDB NOCREATEROLE LOGIN PASSWORD 'wonderland';
CREATE ROLE
postgres=# GRANT EXECUTE ON FUNCTION dblink_connect_u(text,text) to alice;
GRANT
postgres=# \c postgres alice
You are now connected to database "postgres" as user "alice".
postgres=> SELECT dblink_connect_u('sm_conn_30','dbname=postgres user=alice password=wonderland');
 dblink_connect_u
------------------
 OK
(1 row)

postgres=> SELECT * FROM dblink_send_query('sm_conn_30','SELECT pg_stat_reset()') as dgr;
 dgr
-----
   1
(1 row)

postgres=> SELECT * FROM dblink_get_result('sm_conn_30') AS dgr(curr_user boolean);
ERROR:  permission denied for function pg_stat_reset
CONTEXT:  Error occurred on dblink connection named "unnamed": could not execute query.

This started with below commit:

commit acaf7ccb94a3916ea83712671a3563f0eb595558
Author: Peter Eisentraut <peter_e@gmx.net>
Date:   Sun Dec 25 12:00:00 2016 -0500

    dblink: Replace some macros by static functions
   
    Also remove some unused code and the no longer useful dblink.h file.
   
    Reviewed-by: Tsunakawa, Takayuki <tsunakawa.takay@jp.fujitsu.com>


Before this, macro used to assign the conname local variable; I quickly worked
on the fix and attached patch do fix the issues. Patch assign the conname
local variable, so that error context show the correct connection name.


Regards,
Rushabh Lathia
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