From a8b5faacdce41f6186c9d185c5a7c97acfa3c3d8 Mon Sep 17 00:00:00 2001
From: saxmatt <saxmatt@1a063a9b-81f0-0310-95a4-ce76da25c4cd>
Date: Tue, 6 Jan 2004 12:44:46 +0000
Subject: [PATCH] Reduce queries.

git-svn-id: http://svn.automattic.com/wordpress/trunk@727 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-blog-header.php                 | 20 ++++++++++++++++++++
 wp-includes/template-functions.php | 20 ++++++++++++--------
 2 files changed, 32 insertions(+), 8 deletions(-)

diff --git a/wp-blog-header.php b/wp-blog-header.php
index 07234917b7..6d6433a4bc 100644
--- a/wp-blog-header.php
+++ b/wp-blog-header.php
@@ -167,6 +167,7 @@ if ((empty($cat)) || ($cat == 'all') || ($cat == '0')) {
 
 if ('' != $category_name) {
 	$category_name = preg_replace('|[^a-z0-9-/]|', '', $category_name);
+	$tables = ", $tablepost2cat, $tablecategories";
 	$join = " LEFT JOIN $tablepost2cat ON ($tableposts.ID = $tablepost2cat.post_id) LEFT JOIN $tablecategories ON ($tablepost2cat.category_id = $tablecategories.cat_ID) ";
 	$whichcat = " AND (category_nicename = '$category_name') ";
 	$cat = $wpdb->get_var("SELECT cat_ID FROM $tablecategories WHERE category_nicename = '$category_name'");
@@ -319,6 +320,25 @@ if ($preview) {
 // echo $request;
 $posts = $wpdb->get_results($request);
 
+
+// Get the categories for all the posts
+foreach ($posts as $post) {
+	$post_id_list[] = $post->ID;
+}
+$post_id_list = implode(',', $post_id_list);
+
+$dogs = $wpdb->get_results("SELECT DISTINCT 
+	ID, category_id, cat_name, category_nicename, category_description 
+	FROM $tablecategories, $tablepost2cat, $tableposts 
+	WHERE category_id = cat_ID AND post_id = ID AND post_id IN ($post_id_list)");
+	
+foreach ($dogs as $catt) {
+	$category_cache[$catt->ID][] = $catt;
+}
+
+// Do the same for comment numbers
+
+
 if (1 == count($posts)) {
 	if ($p || $name) {
 		$more = 1;
diff --git a/wp-includes/template-functions.php b/wp-includes/template-functions.php
index 4967d6d1dc..c314d156d0 100644
--- a/wp-includes/template-functions.php
+++ b/wp-includes/template-functions.php
@@ -1332,14 +1332,18 @@ function posts_nav_link($sep=' :: ', $prelabel='<< Previous Page', $nxtlabel='Ne
 /***** Category tags *****/
 
 function get_the_category() {
-	global $post, $tablecategories, $tablepost2cat, $wpdb;
-	$categories = $wpdb->get_results("
-		SELECT category_id, cat_name, category_nicename, category_description 
-		FROM  $tablecategories, $tablepost2cat 
-		WHERE $tablepost2cat.category_id = cat_ID AND $tablepost2cat.post_id = $post->ID
-		");
-
-	return $categories;
+	global $post, $tablecategories, $tablepost2cat, $wpdb, $category_cache;
+	if ($category_cache[$post->ID]) {
+		return $category_cache[$post->ID];
+	} else {
+		$categories = $wpdb->get_results("
+			SELECT category_id, cat_name, category_nicename, category_description 
+			FROM  $tablecategories, $tablepost2cat 
+			WHERE $tablepost2cat.category_id = cat_ID AND $tablepost2cat.post_id = $post->ID
+			");
+	
+		return $categories;
+	}
 }
 
 function get_category_link($echo = false, $category_id, $category_nicename) {