Oracle: active? performs a select instead of a commit. References #3133.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3252 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Oracle: active? performs a select instead of a commit.  #3133 [Michael Schoen]
+
 * MySQL: more robust test for nullified result hashes.  #3124 [Stefan Kaes]
 
 * SQLite: find database file when RAILS_ROOT is a symlink.  #3116 [anna@wota.jp]

activerecord/lib/active_record/connection_adapters/oci_adapter.rb

@@ -550,7 +550,7 @@ begin
     # checks the connection, while #active? simply returns the last
     # known state.
     def ping
-      @connection.commit
+      @connection.exec("select 1 from dual") { |r| nil }
       @active = true
     rescue
       @active = false