MySQL: active? compatibility with the pure-Ruby driver. References #428.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3194 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* MySQL: active? compatibility with the pure-Ruby driver.  #428 [Jeremy Kemper]
+
 * Oracle: active? check pings the database rather than testing the last command status.  #428 [Michael Schoen]
 
 * SQLServer: resolve column aliasing/quoting collision when using limit or offset in an eager find.  #2974 [kajism@yahoo.com]

activerecord/lib/active_record/connection_adapters/mysql_adapter.rb

@@ -150,7 +150,11 @@ def quoted_false
       # CONNECTION MANAGEMENT ====================================
 
       def active?
-        @connection.stat if @connection.respond_to?(:stat)
+        if @connection.respond_to?(:stat)
+          @connection.stat
+        else
+          @connection.query 'select 1'
+        end
         true
       rescue Mysql::Error
         false