Re: pg_fetch_row Problem

Hi Cameron,

It will take a long time unless you have some indexes on your fields -
even then depending on how much data you have :)

Echo out the query it's running and speed that up - using 'explain' is
the easiest way to work out what's going on. See
http://www.postgresql.org/docs/7.4/static/indexes-examine.html for more
info on explain.

You'll most likely need to add an index on whichever field gets compared
for startdate and enddate (at least) ....

Apart from that without seeing the proper query it runs and the database
table schema we're just guessing.

Chris.

-----Original Message-----
From: Seader, Cameron [mailto:CSeader(at)idahopower(dot)com]
Sent: Wednesday, March 03, 2004 12:51 AM
To: Chris Smith; pgsql-php(at)postgresql(dot)org
Subject: RE: [PHP] pg_fetch_row Problem

Greetings,
I set the set_time_limit function to this set_time_limit(20*60); // This
will set timelimit to 20 minutes.

Wow this script take a long time to execute. Why is it takeing so long?
Is there a better way to do this?

-Cameron

-----Original Message-----
From: Chris Smith [mailto:chris(at)interspire(dot)com]
Sent: Monday, March 01, 2004 5:41 PM
To: Seader, Cameron; pgsql-php(at)postgresql(dot)org
Subject: RE: [PHP] pg_fetch_row Problem

Hi Cameron,

Excellent :)

The max timeout is a PHP thing - see
http://www.php.net/manual/en/function.set-time-limit.php

Chris.

-----Original Message-----
From: Seader, Cameron [mailto:CSeader(at)idahopower(dot)com]
Sent: Tuesday, March 02, 2004 11:34 AM
To: Chris Smith; pgsql-php(at)postgresql(dot)org
Subject: RE: [PHP] pg_fetch_row Problem

Chris,
I tryed this out and it works great thanks, but now i get this message.

Fatal error: Maximum execution time of 30 seconds exceeded in
/var/www/html/PMS/csv_export.php on line 41

Know where i can set execution times?
is this for PHP or PostgreSQL?

Thanks,
Cameron
-----Original Message-----
From: Chris Smith [mailto:chris(at)interspire(dot)com]
Sent: Monday, March 01, 2004 5:17 PM
To: Seader, Cameron; pgsql-php(at)postgresql(dot)org
Subject: RE: [PHP] pg_fetch_row Problem

Hi Cameron,

I think the reason is you're going beyond the number of results you have
for that query.

Rewrite the while(...) loop to look like this:

$result_count = 0;
while($result_count < $count) {
$row = pg_fetch_row($result, $result_count);
.........
}

See if that works.

Chris.

-----Original Message-----
From: pgsql-php-owner(at)postgresql(dot)org
[mailto:pgsql-php-owner(at)postgresql(dot)org] On Behalf Of Seader, Cameron
Sent: Tuesday, March 02, 2004 10:50 AM
To: pgsql-php(at)postgresql(dot)org
Subject: [PHP] pg_fetch_row Problem

Greetings,
I am not sure what is going on with my script here, but i am getting
this error when i run it.
Warning: pg_fetch_row(): Unable to jump to row 706 on PostgreSQL result
index 3. in /var/www/html/PMS/csv_export.php on line 32

Warning: Cannot modify header information - headers already sent by
(output started at /var/www/html/PMS/csv_export.php:4) in
/var/www/html/PMS/csv_export.php on line 59

Warning: Cannot modify header information - headers already sent by
(output started at /var/www/html/PMS/csv_export.php:4) in
/var/www/html/PMS/csv_export.php on line 62

Warning: Cannot modify header information - headers already sent by
(output started at /var/www/html/PMS/csv_export.php:4) in
/var/www/html/PMS/csv_export.php on line 63

Warning: Cannot modify header information - headers already sent by
(output started at /var/www/html/PMS/csv_export.php:4) in
/var/www/html/PMS/csv_export.php on line 64 Can anyone tell me what is
going on here??????? I am including my script here below so you can see
what it is doing, maybe you all can see something im not: <?php
pg_connect("host=172.18.74.10 port=5432 dbname=acquisuite_db
user=pgadmin password=pgadmin")
or die ( 'Unable to
connect to server.' );
printf("Connected
Successfully");

$MM_param1__panels = ''%'';
if (isset($HTTP_GET_VARS['panel'])) {
$MM_param1__panels = $HTTP_GET_VARS['panel'];
}
$MM_param2__panels = ''%'';
if (isset($HTTP_GET_VARS['startdate'])) {
$MM_param2__panels = $HTTP_GET_VARS['startdate'];
}
$MM_param3__panels = ''%'';
if (isset($HTTP_GET_VARS['enddate'])) {
$MM_param3__panels = $HTTP_GET_VARS['enddate'];
}
$MM_param4__panels = ''%'';
if (isset($HTTP_GET_VARS['order'])) {
$MM_param4__panels = $HTTP_GET_VARS['order'];
}

$query = sprintf("SELECT * FROM %s WHERE utctime AT TIME ZONE 'MST'
BETWEEN '%s' AND '%s' ORDER BY utctime %s",
$MM_param1__panels,$MM_param2__panels,$MM_param3__panels,$MM_param4__pan
els);

$result = pg_exec($query);
$count = pg_num_fields($result);

for ($i = 0; $i < $count; $i++){
$header .= pg_fieldname($result,$i)."\t";
}

while($row = pg_fetch_row($result,$result_count++)){
$line = '';
foreach($row as $value){
if(!isset($value) || $value == ""){
$value = "\t";
}else{
# important to escape any quotes to preserve them in the data.
$value = str_replace('"', '""', $value);
# needed to encapsulate data in quotes because some data might be multi
line. # the good news is that numbers remain numbers in Excel even
though quoted.
$value = '"' . $value . '"' . "\t";
}
$line .= $value;
}
$data .= trim($line)."\n";
}
# this line is needed because returns embedded in the data have "\r" #
and this looks like a "box character" in Excel
$data = str_replace("\r", "", $data);

# Nice to let someone know that the search came up empty.
# Otherwise only the column name headers will be output to Excel. if
($data == "") {
$data = "\nno matching records found\n";
}

# This line will stream the file to the user rather than spray it across
the screen
header("Content-type: application/octet-stream");

# replace excelfile.xls with whatever you want the filename to default
to
header("Content-Disposition: attachment; filename=excelfile.xls");
header("Pragma: no-cache");
header("Expires: 0");

echo $header."\n".$data;
?>

Any Help would be appreciated.
Thanks,

Cameron Seader
mailto:CSeader(at)Idahopower(dot)com
1.208.388.2582 Office

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