From dde1e3ce841da0f2d3848b2ee8f72097a5b3bf61 Mon Sep 17 00:00:00 2001
From: lucasstark <lucas.stark@live.com>
Date: Wed, 21 Mar 2012 08:55:34 -0300
Subject: [PATCH] Efficiency update for price filter

---
 widgets/widget-price_filter.php | 76 +++++++++++++++------------------
 1 file changed, 35 insertions(+), 41 deletions(-)

diff --git a/widgets/widget-price_filter.php b/widgets/widget-price_filter.php
index a6881b2dbba..5fe336cf9d9 100644
--- a/widgets/widget-price_filter.php
+++ b/widgets/widget-price_filter.php
@@ -34,49 +34,43 @@ function woocommerce_price_filter_init() {
 /**
  * Price Filter post filter
  */
-function woocommerce_price_filter( $filtered_posts ) {
+function woocommerce_price_filter($filtered_posts) {
+    global $wpdb;
+    
+    if (isset($_GET['max_price']) && isset($_GET['min_price'])) :
 
-	if (isset($_GET['max_price']) && isset($_GET['min_price'])) :
-		
-		$matched_products = array();
-		
-		$matched_products_query = get_posts(array(
-			'post_type' => array(
-				'product_variation',
-				'product'
-			),
-			'post_status' => 'publish',
-			'posts_per_page' => -1,
-			'meta_query' => array(
-				array(
-					'key' => '_price',
-					'value' => array( $_GET['min_price'], $_GET['max_price'] ),
-					'type' => 'NUMERIC',
-					'compare' => 'BETWEEN'
-				)
-			)
-		));
+        $matched_products = array();
+        $low = floatval($_GET['min_price']);
+        $high = floatval($_GET['max_price']);
+        
+        $matched_products_query = $wpdb->get_results(
+                $wpdb->prepare(
+                        "SELECT DISTINCT ID, post_parent, post_type FROM $wpdb->posts
+                             INNER JOIN $wpdb->postmeta ON ID = post_id
+                             WHERE (post_type='product' OR post_type='product_variation') AND post_status = 'publish' AND meta_key = %s AND meta_value BETWEEN %d AND %d", '_price', $low, $high), OBJECT_K);
 
-		if ($matched_products_query) :
-			foreach ($matched_products_query as $product) :
-				if ($product->post_type == 'product') $matched_products[] = $product->ID;
-				if ($product->post_parent>0 && !in_array($product->post_parent, $matched_products))
-					$matched_products[] = $product->post_parent;
-			endforeach;
-		endif;
-		
-		// Filter the id's
-		if (sizeof($filtered_posts)==0) :
-			$filtered_posts = $matched_products;
-			$filtered_posts[] = 0;
-		else :
-			$filtered_posts = array_intersect($filtered_posts, $matched_products);
-			$filtered_posts[] = 0;
-		endif;
-		
-	endif;
-	
-	return (array) $filtered_posts;
+
+        if ($matched_products_query) :
+            foreach ($matched_products_query as $product) :
+                if ($product->post_type == 'product')
+                    $matched_products[] = $product->ID;
+                if ($product->post_parent > 0 && !in_array($product->post_parent, $matched_products))
+                    $matched_products[] = $product->post_parent;
+            endforeach;
+        endif;
+
+        // Filter the id's
+        if (sizeof($filtered_posts) == 0) :
+            $filtered_posts = $matched_products;
+            $filtered_posts[] = 0;
+        else :
+            $filtered_posts = array_intersect($filtered_posts, $matched_products);
+            $filtered_posts[] = 0;
+        endif;
+
+    endif;
+
+    return (array) $filtered_posts;
 }
 
 /**