[Pgpool-hackers] First pcp command as PostgreSQL function

[Jehan-Guillaume (ioguix) de Rorthais]

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I forgot to add that I had to comment line 29 of my
"/usr/local/include/pool_type.h" to be able to build the module. If I
don't, I have the following error:

  In file included from /usr/local/include/pcp.h:27:0,
                 from pgpool_adm.c:22:
  /usr/local/include/pool_type.h:29:20: fatal error: config.h: No such
file or directory


Any idea about how to fix that ?

On 31/03/2011 13:18, Jehan-Guillaume (ioguix) de Rorthais wrote:
> Hello,
> 
> Following our previous discussions I created a PostgreSQL contrib module
> which brings pgpool's pcp command as function in PostgreSQL. I called it
> pgpool_adm, any better ideas ?
> 
> As a first step, I decided to focus on one function only: pcp_node_info.
> I'll add other ones as soon as this one will be committable.
> 
> INSTALL: (tested against current 9.1devel HEAD)
> 
>   $ cd $PGSRC/contrib
>   $ tar zxf pgpool_adm.tgz
>   $ cd pgpool_adm
>   $ make && sudo make install
> 
> then:
> 
>   $ psql pgpool
>   CREATE SCHEMA pgpool;
>   CREATE EXTENSION pgpool_adm WITH SCHEMA pgpool ;
>   SELECT * FROM pgpool.pcp_node_info(0, 'localhost', 10, 9898,
> 'pgpool_adm', 'password');
>      host    | port |             status              |   weight
>   -----------+------+---------------------------------+-------------
>    localhost | 5491 | Waiting for connection to start | 1.46602e+13
>   (1 ligne)
> 
> If you don't want/cannot test with 9.1, just adapt and run the "CREATE
> FUNCTION" query located in pgpool_adm/pgpool_adm--1.0.sql.
> 
> NOTE:
> I had to mess a bit to make the compilation work out of the box because
> of my setup of pgpool installing stuffs in /usr/local/{lib,include}.
> Basically editing my system ldd setup and configuring postgresql with
> "--with-libraries" and "--with-includes". Drop me a mail if you have any
> trouble.
> 
> TODO:
>   * I will try to make it work with foreign server and user mappings so
> we will not have to give all servers parameters (host, port, timeout),
> but most importantly, not have to write in clear text authentication
> parameters.
>   * Why do we backend_weight/RAND_MAX in the code ?
> 
> Feedback & comments ?

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- -- 
Jehan-Guillaume (ioguix) de Rorthais
DBA
http://www.dalibo.com
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