Merge pull request #7983 from georgebrock/bug7950-squashed

Backport 4bc2ae0 to fix #7950

Conflicts:
	activerecord/CHANGELOG.md
	activerecord/lib/active_record/relation/calculations.rb

1 files changed, 4 insertions, 3 deletions

diff --git a/activerecord/lib/active_record/relation/calculations.rb b/activerecord/lib/active_record/relation/calculations.rb
index 8b605dd4f1..45e9e64229 100644
--- a/activerecord/lib/active_record/relation/calculations.rb
+++ b/activerecord/lib/active_record/relation/calculations.rb
@@ -180,7 +180,7 @@ module ActiveRecord
       column_name = column_name.to_s
       relation = clone
       relation.select_values = [column_name]
-      klass.connection.select_all(relation.arel).map! do |attributes|
+      klass.connection.select_all(relation.arel, nil, bind_values).map! do |attributes|
         klass.type_cast_attribute(attributes.keys.first, klass.initialize_attributes(attributes))
       end
     end
@@ -242,7 +242,8 @@ module ActiveRecord
         query_builder = relation.arel
       end
 
-      type_cast_calculated_value(@klass.connection.select_value(query_builder), column_for(column_name), operation)
+      result = @klass.connection.select_value(query_builder, nil, relation.bind_values)
+      type_cast_calculated_value(result, column_for(column_name), operation)
     end
 
     def execute_grouped_calculation(operation, column_name, distinct) #:nodoc:
@@ -288,7 +289,7 @@ module ActiveRecord
       relation = except(:group).group(group)
       relation.select_values = select_values
 
-      calculated_data = @klass.connection.select_all(relation)
+      calculated_data = @klass.connection.select_all(relation, nil, bind_values)
 
       if association
         key_ids     = calculated_data.collect { |row| row[group_aliases.first] }