fix calculations for the Oracle Adapter (closes #4626) [Michael Schoen]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4192 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 2 insertions, 2 deletions

diff --git a/activerecord/lib/active_record/calculations.rb b/activerecord/lib/active_record/calculations.rb
index b62d205201..d586bec8e6 100644
--- a/activerecord/lib/active_record/calculations.rb
+++ b/activerecord/lib/active_record/calculations.rb
@@ -145,7 +145,7 @@ module ActiveRecord
       protected
         def construct_calculation_sql(aggregate, aggregate_alias, options) #:nodoc:
           scope = scope(:find)
-          sql  = ["SELECT #{aggregate} AS #{aggregate_alias}"]
+          sql  = "SELECT #{aggregate} AS #{aggregate_alias}"
           sql << ", #{options[:group_field]} AS #{options[:group_alias]}" if options[:group]
           sql << " FROM #{table_name} "
           add_joins!(sql, options, scope)
@@ -154,7 +154,7 @@ module ActiveRecord
           sql << " HAVING #{options[:having]}" if options[:group] && options[:having]
           sql << " ORDER BY #{options[:order]}" if options[:order]
           add_limit!(sql, options)
-          sql.join
+          sql
         end
 
         def execute_simple_calculation(operation, column_name, column, aggregate, aggregate_alias, options) #:nodoc: