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bug 376: improved get_available_tags sql queries for large databases

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git-svn-id: http://piwigo.org/svn/trunk@2087 68402e56-0260-453c-a942-63ccdbb3a9ee
This commit is contained in:
rvelices
2007-09-12 03:37:01 +00:00
parent f647fc4f26
commit 9aa5052f6d
1 changed files with 22 additions and 37 deletions
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59
include/functions_tag.inc.php
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@@ -8,7 +8,6 @@
// | last update : $Date$
// | last modifier : $Author$
// | revision : $Revision$
// | revision : $Revision$
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify |
// | it under the terms of the GNU General Public License as published by |
@@ -39,56 +38,42 @@
function get_available_tags()
{
// we can find top fatter tags among reachable images
$tags_query = '
SELECT id, name, url_name, count(*) counter
FROM '.IMAGE_TAG_TABLE.'
INNER JOIN '.TAGS_TABLE.' ON tag_id = id';
$where_tag_img =
get_sql_condition_FandF
$query = '
SELECT tag_id, COUNT(DISTINCT(it.image_id)) counter
FROM '.IMAGE_CATEGORY_TABLE.' ic
INNER JOIN '.IMAGE_TAG_TABLE.' it ON ic.image_id=it.image_id'.get_sql_condition_FandF
(
array
(
'forbidden_categories' => 'category_id',
'visible_categories' => 'category_id',
'visible_images' => 'image_id'
'visible_images' => 'ic.image_id'
),
'WHERE'
);
'
WHERE'
).'
GROUP BY tag_id';
$tag_counters = simple_hash_from_query($query, 'tag_id', 'counter');
if (!empty($where_tag_img))
if ( empty($tag_counters) )
{
// first we need all reachable image ids
$images_query = '
SELECT DISTINCT image_id
FROM '.IMAGE_CATEGORY_TABLE.'
'.$where_tag_img.'
;';
$image_ids = array_from_query($images_query, 'image_id');
if ( empty($image_ids) )
{
return array();
}
$tags_query.= '
WHERE image_id IN ('.
wordwrap(
implode(', ', $image_ids),
80,
"\n"
).')';
return array();
}
$tags_query.= '
GROUP BY tag_id
;';
$result = pwg_query($tags_query);
$query = '
SELECT id, name, url_name
FROM '.TAGS_TABLE;
$result = pwg_query($query);
$tags = array();
while ($row = mysql_fetch_assoc($result))
{
array_push($tags, $row);
$counter = @$tag_counters[ $row['id'] ];
if ( $counter )
{
$row['counter'] = $counter;
array_push($tags, $row);
}
}
return $tags;
}