From 8fe6767f3b15e706de276e2e484e3cac16cc7ceb Mon Sep 17 00:00:00 2001
From: Peter Westwood <westi@git.wordpress.org>
Date: Sat, 6 Oct 2007 08:40:54 +0000
Subject: [PATCH] Move all calls to mysql_ functions to withiWPDB so that t we
 don't expect any mysql stuff when we are using a custo$wpdb class. Fixes
 #5127 props ComputerGuru.

git-svn-id: https://develop.svn.wordpress.org/trunk@6199 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-admin/includes/schema.php  |  2 +-
 wp-admin/includes/upgrade.php | 10 ++++------
 wp-includes/wp-db.php         | 23 ++++++++++++++++++++++-
 3 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/wp-admin/includes/schema.php b/wp-admin/includes/schema.php
index f267e43798..922540d2ac 100644
--- a/wp-admin/includes/schema.php
+++ b/wp-admin/includes/schema.php
@@ -3,7 +3,7 @@
 
 $charset_collate = '';
 
-if ( version_compare(mysql_get_server_info(), '4.1.0', '>=') ) {
+if ( $wpdb->supports_collation() ) {
 	if ( ! empty($wpdb->charset) )
 		$charset_collate = "DEFAULT CHARACTER SET $wpdb->charset";
 	if ( ! empty($wpdb->collate) )
diff --git a/wp-admin/includes/upgrade.php b/wp-admin/includes/upgrade.php
index 5dded27306..6f8b8e75e6 100644
--- a/wp-admin/includes/upgrade.php
+++ b/wp-admin/includes/upgrade.php
@@ -1239,12 +1239,10 @@ function translate_level_to_role($level) {
 }
 
 function wp_check_mysql_version() {
-	global $wp_version;
-
-	// Make sure the server has MySQL 4.0
-	$mysql_version = preg_replace('|[^0-9\.]|', '', @mysql_get_server_info());
-	if ( version_compare($mysql_version, '4.0.0', '<') )
-		die(sprintf(__('<strong>ERROR</strong>: WordPress %s requires MySQL 4.0.0 or higher'), $wp_version));
+	global $wpdb;
+	$result = $wpdb->check_database_version();
+	if ( is_wp_error( $result ) )
+		die( $result->get_error_message() );
 }
 
 function maybe_disable_automattic_widgets() {
diff --git a/wp-includes/wp-db.php b/wp-includes/wp-db.php
index a2b98c7c66..e5537bbead 100644
--- a/wp-includes/wp-db.php
+++ b/wp-includes/wp-db.php
@@ -403,8 +403,29 @@ class wpdb {
 			return false;
 		wp_die($message);
 	}
+	/**
+	 * Checks wether of not the database version is high enough to support the features WordPress uses
+	 * @global $wp_version
+	 */
+	function check_database_version()
+	{
+		global $wp_version;
+		// Make sure the server has MySQL 4.0
+		$mysql_version = preg_replace('|[^0-9\.]|', '', @mysql_get_server_info());
+		if ( version_compare($mysql_version, '4.0.0', '<') )
+			return new WP_Error('database_version',sprintf(__('<strong>ERROR</strong>: WordPress %s requires MySQL 4.0.0 or higher'), $wp_version));
+	}
+
+	/**
+	 * This function is called when WordPress is generating the table schema to determine wether or not the current database
+	 * supports or needs the collation statements.
+	 */
+	function supports_collation()
+	{
+		return ( version_compare(mysql_get_server_info(), '4.1.0', '>=') );
+	}
 }
 
 if ( ! isset($wpdb) )
 	$wpdb = new wpdb(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST);
-?>
\ No newline at end of file
+?>