Hi Simon,
Thanks for the thoughts, here's what I tried:
$select = $this->db->select()->from( array( 'swatches' ), array(
new Zend_Db_Expr('SQL_CALC_FOUND_ROWS '),
'swatch_id' => 'swatches.id',
'categories.category_name',
'collections.collection_name',
'patterns.pattern_name',
'pattern_types.pattern_type_name',
'color_categories.color_category_name',
'swatches.color') );
This is the sql statement:
SELECT SQL_CALC_FOUND_ROWS , `swatches`.`id` AS `swatch_id`,
`categories`.`category_name`,
If you look closely it's sticking a comma in between SQL_CALC_FOUND_ROWS and
the next column. Which will throw an error.
Though looking at this I bet I could do something like
New Zend_Db_expr( 'SQL_CALC_FOUND_ROWS swatches.id AS swatch_id'), then all
the normal stuff seems like one way to get around it.
Well that's a lot easier than trying to subclass . though I do like how much
cleaner subclassing could be versus doing something like te above line .
Mark
_____
From: Simon Mundy [mailto:[EMAIL PROTECTED]
Sent: Thursday, April 17, 2008 8:50 PM
To: Gunter Sammet
Cc: Mark Steudel; Shekar C Reddy; James Dempster; fw-general@lists.zend.com
Subject: Re: [fw-general] CALC_FOUND_ROWS vs. count(*)
Hi Gunter
Thanks for the clarification. The statement I used below will still work
after a select() is executed:-
$select->from('yourtable', new Zend_Db_Expr('SQL_CALC_FOUND_ROWS
*'))->where('id > ?', 100)->limit(10); // SELECT SQL_CALC_FOUND_ROWS * FROM
`yourtable` WHERE (id > 100) LIMIT 10
$select->from(null, new Zend_Db_Expr('FOUND_ROWS()')); // SELECT
FOUND_ROWS()
You won't need to subclass Zend_Db_Select to achieve this.
The pagination feature request is something I see a lot of value in and it
certainly hasn't been forgotten - the challenge is to work out how we can
achieve this consistently for each adapter. Whilst I have a good grasp of
SQLITE, MySQL and PgSQL I think there may be some help needed for the other
flavours, such as DB2, Oracle, etc...
Cheers
Hi Simon:
The reason to prepend CALC_FOUND_ROWS in MySQL is to be able to get the
total number of rows for a statement if you restrict with a limit for
pagination. Have a quick look at
http://dev.mysql.com/doc/refman/5.1/en/information-functions.html#function_f
ound-rows to see how it works.
For pagination it would be nice having a way to determine the number of rows
without the limit clause. Since Zend_Db handles multiple databases we would
need an implementation for each flavor.
As mentioned before, I suggested it before but didn't get much feedback on
it. And I didn't have the time to work on it myself.
Cheers,
Gunter
On Thu, Apr 17, 2008 at 9:01 PM, Simon Mundy <[EMAIL PROTECTED]>
wrote:
Hi Mark
Do I understand correctly that you just needed to use that function as a
returning field?
If so, did the following not work for you?
$select->from('yourtable', array('line_items_per_product' => new
Zend_Db_Expr('CALC_FOUND_ROWS')));
Using a Zend_Db_Expr prevents a string from having further escaping applied
to it.
Cheers
Well ... I played around with this and was able to hack up the Select class
to put this functionality in. here it is if anyone is interested:
http://www.mindfulinteractive.com/zend/Select.txt
Basically you can now do something like
$select->sqlCalcFoundRows();
And it will add 'SQL_CALC_FOUND_ROWS' at the beginning of the sql statement.
I don't know what will happen if you do both distinct and sqlCalcFoundRows
...
I'm now trying to see if I can subclass it, but I'm not a OOP Master. Here's
my attempt, but I can't quite seem to override $_partsInit with my
$_partsInit ...
<?php
class NewSelect extends Zend_Db_Select {
const CALC_ROWS = 'sqlCalcFoundRows';
const SQL_CALC_ROWS = 'SQL_CALC_FOUND_ROWS';
/**
* The initial values for the $_parts array.
* NOTE: It is important for the 'FOR_UPDATE' part to be last to ensure
* meximum compatibility with database adapters.
*
* @var array
*/
protected static $_partsInit = array(
self::DISTINCT => false,
self::CALC_ROWS => false,
self::COLUMNS => array(),
self::FROM => array(),
self::WHERE => array(),
self::GROUP => array(),
self::HAVING => array(),
self::ORDER => array(),
self::LIMIT_COUNT => null,
self::LIMIT_OFFSET => null,
self::FOR_UPDATE => false
);
public function sqlCalcFoundRows( $flag = true )
{
echo 'test';
$this->_parts[self::CALC_ROWS] = (bool) $flag;
return $this;
}
protected function _renderSqlCalcFoundRows( $sql )
{
if( $this->_parts[self::CALC_ROWS]) {
$sql .= ' ' . self::SQL_CALC_ROWS ;
}
return $sql;
}
}
MS
-----Original Message-----
From: Shekar C Reddy [mailto:[EMAIL PROTECTED]
Sent: Thursday, April 17, 2008 1:41 PM
To: Gunter Sammet
Cc: Mark Steudel; James Dempster; fw-general@lists.zend.com
Subject: Re: [fw-general] CALC_FOUND_ROWS vs. count(*)
Creating a Jira issue would be ideal to keep a track of this task.
On Thu, Apr 17, 2008 at 3:21 PM, Gunter Sammet <[EMAIL PROTECTED]>
wrote:
I ended up retrieving the SQL as string and do a string replace and then
execute the SQL statement. Not very elegant but it solved my problem at
that
time. If you come up with a more elegant way, please let me know.
Once I have time I'd like to add this as a functionality to the select
class
to allow for an DB independant way of doing this. I remember that I asked
in
the forum before and at that time it didn't seem to be very much required
and for that reason didn't have much importance.
HTH
Gunter
On Thu, Apr 17, 2008 at 2:07 PM, Mark Steudel <[EMAIL PROTECTED]> wrote:
Well couple of problems,
I can't mix a count() statement in my sql statement the whole mixing
group
columns with non group columns thing
Even if I try and trick it by putting at the begging the select methods
quote everything, so it because something like:
SELECT `SQL_CALC_FOUND_ROWS table`.`id` ..
:/ Any other ideas?
MS
________________________________
From: James Dempster [mailto:[EMAIL PROTECTED]
Sent: Thursday, April 17, 2008 12:48 PM
To: Mark Steudel
Cc: fw-general@lists.zend.com
Subject: Re: [fw-general] CALC_FOUND_ROWS vs. count(*)
Have you tried
array('line_items_per_product' => 'CALC_FOUND_ROWS COUNT(*)'))
I think that might work.
--
/James
On Thu, Apr 17, 2008 at 8:06 PM, Mark Steudel <[EMAIL PROTECTED]>
wrote:
Hey Guys,
I was looking for a way to use CALC_FOUND_ROWS in mysql, I saw in the
documentation you could get the same thing by doing this:
array('line_items_per_product' => 'COUNT(*)'))
If I wanted to do CALC_FOUND_ROWS instead, how would I do it utilizing
the
Zend_DB?
Thanks, Mark
--
Simon Mundy | Director | PEPTOLAB
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202/258 Flinders Lane | Melbourne | Victoria | Australia | 3000
Voice +61 (0) 3 9654 4324 | Mobile 0438 046 061 | Fax +61 (0) 3 9654 4124
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--
Simon Mundy | Director | PEPTOLAB
""" " "" """""" "" "" """"""" " "" """"" " """"" " """""" "" "
202/258 Flinders Lane | Melbourne | Victoria | Australia | 3000
Voice +61 (0) 3 9654 4324 | Mobile 0438 046 061 | Fax +61 (0) 3 9654 4124
http://www.peptolab.com
