[pgpool-general: 4705] Re: In pgpool while using delete query inside postgresql function , it is not deletingdata from all servers

[Tatsuo Ishii]

> Hi,
> 
> I have created following function in pgpool .
> 
> CREATE OR REPLACE Function fun1(Id int)
> RETURNS boolean as $executionStatus$
> DECLARE
> 
> BEGIN
>     DELETE FROM table1 where table1_id =  Id ;
>     DELETE from table2 where table2_id =  Id ;
>     DELETE from table3 where table3_id =  Id ;
>     RETURN true;
> END;
> $executionStatus$ LANGUAGE plpgsql;
> 
> I run following command inside the postgres shell of pgpool
> 
> select fun1(1);
> It is deleted the data only from master. I tried again then it is deleted
> from different server.So replication fails in this case. But if i use
> delete queries separately then it is working fine.It is deleting data from
> all servers.
> 
> DELETE FROM table1 where table1_id =  1 ;DELETE from table2 where table2_id
> =  1 ;DELETE from table3 where table3_id =  1 ;
> 
> Please let me know how to fix this issue .

Assuming you are using replication mode (replication_mode = on)、I
guess the SELECT is load balanced and only one of the PostgreSQL
servers receives the command. Solution would be:

1) Add "/*NO LOAD BALANCE*/" commento in front of the SELECT.

2) Add func1 to the black_function_list.

Best regards,
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese:http://www.sraoss.co.jp