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authorrvelices <rv-github@modusoptimus.com>2007-09-12 03:37:01 +0000
committerrvelices <rv-github@modusoptimus.com>2007-09-12 03:37:01 +0000
commit9aa5052f6dc25257392cce50005f18486f32375a (patch)
tree4a461738560117fe45c982104673f3757040194d /include/functions_tag.inc.php
parentf647fc4f26c4bf01192b40eaee560c94cc497159 (diff)
bug 376: improved get_available_tags sql queries for large databases
git-svn-id: http://piwigo.org/svn/trunk@2087 68402e56-0260-453c-a942-63ccdbb3a9ee
Diffstat (limited to 'include/functions_tag.inc.php')
-rw-r--r--include/functions_tag.inc.php59
1 files changed, 22 insertions, 37 deletions
diff --git a/include/functions_tag.inc.php b/include/functions_tag.inc.php
index c6dc01db6..637ebc627 100644
--- a/include/functions_tag.inc.php
+++ b/include/functions_tag.inc.php
@@ -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;
}