Feature 1255 : improve sql

Replace in queries LIMIT N,M by LIMIT N OFFSET M

git-svn-id: http://piwigo.org/svn/trunk@4331 68402e56-0260-453c-a942-63ccdbb3a9ee

6 files changed, 7 insertions, 7 deletions

diff --git a/admin/cat_perm.php b/admin/cat_perm.php
index 91711ddf1..5ef886e1d 100644
--- a/admin/cat_perm.php
+++ b/admin/cat_perm.php
@@ -59,7 +59,7 @@ if (!isset($page['cat']))
 SELECT id
   FROM '.CATEGORIES_TABLE.'
   WHERE status = \'private\'
-  LIMIT 0,1
+  LIMIT 0 OFFSET 1
 ;';
 
   list($page['cat']) = pwg_db_fetch_row(pwg_query($query));
diff --git a/admin/element_set_global.php b/admin/element_set_global.php
index 3676309e5..79e78e8a2 100644
--- a/admin/element_set_global.php
+++ b/admin/element_set_global.php
@@ -474,7 +474,7 @@ SELECT id,path,tn_ext,file,filesize,level
   FROM '.IMAGES_TABLE.'
   WHERE id IN ('.implode(',', $page['cat_elements_id']).')
   '.$conf['order_by'].'
-  LIMIT '.$page['start'].', '.$page['nb_images'].'
+  LIMIT '.$page['start'].' OFFSET '.$page['nb_images'].'
 ;';
   //echo '<pre>'.$query.'</pre>';
   $result = pwg_query($query);
diff --git a/admin/element_set_unit.php b/admin/element_set_unit.php
index 65206aba4..cf5409296 100644
--- a/admin/element_set_unit.php
+++ b/admin/element_set_unit.php
@@ -196,7 +196,7 @@ SELECT id,path,tn_ext,name,date_creation,comment,author,file
   FROM '.IMAGES_TABLE.'
   WHERE id IN ('.implode(',', $page['cat_elements_id']).')
   '.$conf['order_by'].'
-  LIMIT '.$page['start'].', '.$page['nb_images'].'
+  LIMIT '.$page['start'].' OFFSET '.$page['nb_images'].'
 ;';
   $result = pwg_query($query);
 
diff --git a/admin/include/functions.php b/admin/include/functions.php
index 2b6bffa98..16928e9ab 100644
--- a/admin/include/functions.php
+++ b/admin/include/functions.php
@@ -596,8 +596,8 @@ function set_random_representant($categories)
 SELECT image_id
   FROM '.IMAGE_CATEGORY_TABLE.'
   WHERE category_id = '.$category_id.'
-  ORDER BY RAND()
-  LIMIT 0,1
+  ORDER BY '.DB_RANDOM_FUNCTION.'()
+  LIMIT 0 OFFSET 1
 ;';
     list($representative) = pwg_db_fetch_row(pwg_query($query));
 
diff --git a/admin/include/functions_history.inc.php b/admin/include/functions_history.inc.php
index 824caed42..38d3950eb 100644
--- a/admin/include/functions_history.inc.php
+++ b/admin/include/functions_history.inc.php
@@ -161,7 +161,7 @@ SELECT
   WHERE '.$where_separator.'
 ;';
 
-  // LIMIT '.$page['start'].', '.$conf['nb_logs_page'].'
+  // LIMIT '.$page['start'].' OFFSET '.$conf['nb_logs_page'].'
 
   $result = pwg_query($query);
 
diff --git a/admin/rating.php b/admin/rating.php
index 5f3f93fa3..e5fe48d03 100644
--- a/admin/rating.php
+++ b/admin/rating.php
@@ -176,7 +176,7 @@ SELECT i.id,
   WHERE 1 = 1 ' . $page['user_filter'] . '
   GROUP BY r.element_id
   ORDER BY ' . $available_order_by[$order_by_index][1] .'
-  LIMIT '.$start.','.$elements_per_page.'
+  LIMIT '.$start.' OFFSET '.$elements_per_page.'
 ;';
 
 $images = array();