Re: [GENERAL] Trying to execute several queries involving temp tables in a PHP script

2012-06-15 Thread Alexander Farber 
Thank you Misa, the without-temp-tables query has worked flawlessly.


On Wed, Jun 13, 2012 at 5:01 PM, Misa Simic misa.si...@gmail.com wrote:
 I think you can have all in one query, without temp tables:

  SELECT r.rid, r.cards, to_char(r.stamp, 'DD.MM.
 HH24:MI') as day,
                    c.bid, c.trix, c.pos, c.money, c.last_ip, c.quit,
                    u.id, u.first_name, u.avatar, u.female, u.city,
 u.vip  CURRENT_DATE as vip
                    FROM pref_rounds r, pref_cards c, pref_users u
                    WHERE u.id = c.id and
                        r.rid = c.rid and
                        r.rid in (

  select rid
                    from pref_cards
                    where stamp  now() - interval '1 day' and
                    id in (
  select id
                    from pref_money
                    where yw = to_char(current_timestamp - interval '1
 week', 'IYYY-IW')
                    order by money
                    desc limit 10

 ) and
                    bid = 'Misere' and
                    trix  0


 )
                    order by rid, pos;

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Re: [GENERAL] Trying to execute several queries involving temp tables in a PHP script

2012-06-13 Thread Alban Hertroys 
On 13 June 2012 15:12, Alexander Farber alexander.far...@gmail.com wrote:
 And when I split my statements into multiple
 prepare()/execute() or query() calls,
 then the temp. tables aren't found anymore.

Did you remember to wrap them in a transaction like you did in your
prepared statement?

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Cut the trees and you'll see there is no forest.

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Re: [GENERAL] Trying to execute several queries involving temp tables in a PHP script

2012-06-13 Thread Misa Simic 
Hi Alexander,

I think you can have all in one query, without temp tables:

 SELECT r.rid, r.cards, to_char(r.stamp, 'DD.MM.
HH24:MI') as day,
   c.bid, c.trix, c.pos, c.money, c.last_ip, c.quit,
   u.id, u.first_name, u.avatar, u.female, u.city,
u.vip  CURRENT_DATE as vip
   FROM pref_rounds r, pref_cards c, pref_users u
   WHERE u.id = c.id and
   r.rid = c.rid and
   r.rid in (

 select rid
   from pref_cards
   where stamp  now() - interval '1 day' and
   id in (
 select id
   from pref_money
   where yw = to_char(current_timestamp - interval '1
week', 'IYYY-IW')
   order by money
   desc limit 10

) and
   bid = 'Misere' and
   trix  0


)
   order by rid, pos;



2012/6/13 Alexander Farber alexander.far...@gmail.com

 Hello fello PostgreSQL users,

 with PHP 5.3.3 and PostgreSQL 8.4.11
 (and a pgbouncer, but I've tried without it too)
 I'm trying to execute several SQL queries
 with 2 temp tables (listed below) and then use
 the result of a final join to construct a JSON array.

 Unfortunately my script using prepare/execute
 (and I've tried query() too) fails with PHP error:
 cannot insert multiple commands into a prepared statement.

 And when I split my statements into multiple
 prepare()/execute() or query() calls,
 then the temp. tables aren't found anymore.

 Any ideas please on how to handle this situation
 in PHP scripts, do I really have to encapsulate
 my calls into a pl/PgSQL function?

 More details on my query and setup:

 http://stackoverflow.com/questions/11010784/error-cannot-insert-multiple-commands-into-a-prepared-statement

 And below is my PHP code:

 try {
$options = array(PDO::ATTR_ERRMODE = PDO::ERRMODE_EXCEPTION);
$db = new PDO(sprintf('pgsql:host=%s port=%u; dbname=%s',
DBHOST, DBPORT, DBNAME), DBUSER, DBPASS, $options);

$sth = $db-prepare(
start transaction;
create temporary table temp_ids (id varchar not null) on
 commit drop;
insert into temp_ids (id)
select id
from pref_money
where yw = to_char(current_timestamp - interval '1
 week', 'IYYY-IW')
order by money
desc limit 10;

create temporary table temp_rids (rid integer not null) on
 commit drop;
insert into temp_rids (rid)
select rid
from pref_cards
where stamp  now() - interval '1 day' and
id in (select id from temp_ids) and
bid = 'Misere' and
trix  0;

SELECT r.rid, r.cards, to_char(r.stamp, 'DD.MM.
 HH24:MI') as day,
c.bid, c.trix, c.pos, c.money, c.last_ip, c.quit,
u.id, u.first_name, u.avatar, u.female, u.city,
 u.vip  CURRENT_DATE as vip
FROM pref_rounds r, pref_cards c, pref_users u
WHERE u.id = c.id and
r.rid = c.rid and
r.rid in (select rid from temp_rids)
order by rid, pos;
commit;
);
$sth-execute();
while ($row = $sth-fetch(PDO::FETCH_ASSOC)) {
  # construct a JSON array of objects
}
 } catch (Exception $e) {
exit('Database problem: ' . $e-getMessage());
 }

 Thank you
 Alex

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Re: [GENERAL] Trying to execute several queries involving temp tables in a PHP script

2012-06-13 Thread Leif Biberg Kristensen 
 Onsdag 13. juni 2012 15.12.33 skrev Alexander Farber :

 Any ideas please on how to handle this situation
 in PHP scripts, do I really have to encapsulate
 my calls into a pl/PgSQL function?

I believe that Misa Simic's idea that you can do it all in a single query 
without temp tables is correct. But anyway, it's always a good idea to 
encapsulate multiple interdependent queries in a single pl/pgsql function. I 
tend to keep my PHP code as simple as possible, and do most of the work inside 
the database.

regards, Leif
http://code.google.com/p/yggdrasil-genealogy/

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Re: [GENERAL] Trying to execute several queries involving temp tables in a PHP script

2012-06-13 Thread Misa Simic 
I agree with approach to have all in functions... In that case there would
not be a problem with temp tables because of inside 1 transaction they
would work...

suggestion was just to solve problem from php... what would be achiavable
just trough 1 query, or to use PDO and then:

$dbh-beginTransaction();
$dbh-exec(query1);
$dbh-exec(query2);
$dbh-exec(query3);
$dbh-commit();

Kind Regards,

Misa

2012/6/13 Leif Biberg Kristensen l...@solumslekt.org

  Onsdag 13. juni 2012 15.12.33 skrev Alexander Farber :

  Any ideas please on how to handle this situation
  in PHP scripts, do I really have to encapsulate
  my calls into a pl/PgSQL function?

 I believe that Misa Simic's idea that you can do it all in a single query
 without temp tables is correct. But anyway, it's always a good idea to
 encapsulate multiple interdependent queries in a single pl/pgsql function.
 I
 tend to keep my PHP code as simple as possible, and do most of the work
 inside
 the database.

 regards, Leif
 http://code.google.com/p/yggdrasil-genealogy/

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