4 files changed, 30 insertions, 27 deletions
diff --git a/lib/arel/engines/sql/engine.rb b/lib/arel/engines/sql/engine.rb
index 79011a3db5..f0991f0a0f 100644
--- a/lib/arel/engines/sql/engine.rb
+++ b/lib/arel/engines/sql/engine.rb
@@ -20,7 +20,7 @@ module Arel
 
       module CRUD
         def create(relation)
-          connection.execute(relation.to_sql)
+          connection.insert(relation.to_sql(false), nil, relation.primary_key)
         end
 
         def read(relation)
diff --git a/lib/arel/engines/sql/relations/compiler.rb b/lib/arel/engines/sql/relations/compiler.rb
index 185f1a5c87..c974e43b88 100644
--- a/lib/arel/engines/sql/relations/compiler.rb
+++ b/lib/arel/engines/sql/relations/compiler.rb
@@ -39,29 +39,6 @@ module Arel
         parts.compact.join(" ")
       end
 
-      def from_clauses
-        sources.blank? ? table_sql(Sql::TableReference.new(relation)) : sources
-      end
-
-      def select_clauses
-        attributes.collect { |a| a.to_sql(Sql::SelectClause.new(relation)) }
-      end
-
-      def where_clauses
-        wheres.collect { |w| w.to_sql(Sql::WhereClause.new(relation)) }
-      end
-
-      def group_clauses
-        groupings.collect { |g| g.to_sql(Sql::GroupClause.new(relation)) }
-      end
-
-      def having_clauses
-        havings.collect { |g| g.to_sql(Sql::HavingClause.new(relation)) }
-      end
-
-      def order_clauses
-        orders.collect { |o| o.to_sql(Sql::OrderClause.new(relation)) }
-      end
     end
 
   end
diff --git a/lib/arel/engines/sql/relations/relation.rb b/lib/arel/engines/sql/relations/relation.rb
index 5038e1db81..52b91c71ea 100644
--- a/lib/arel/engines/sql/relations/relation.rb
+++ b/lib/arel/engines/sql/relations/relation.rb
@@ -25,8 +25,34 @@ module Arel
       @primary_key ||= begin
         table.name.classify.constantize.primary_key
       rescue NameError
-        "id"
+        nil
       end
     end
+
+    protected
+
+      def from_clauses
+        sources.blank? ? table_sql(Sql::TableReference.new(self)) : sources
+      end
+
+      def select_clauses
+        attributes.collect { |a| a.to_sql(Sql::SelectClause.new(self)) }
+      end
+
+      def where_clauses
+        wheres.collect { |w| w.to_sql(Sql::WhereClause.new(self)) }
+      end
+
+      def group_clauses
+        groupings.collect { |g| g.to_sql(Sql::GroupClause.new(self)) }
+      end
+
+      def having_clauses
+        havings.collect { |g| g.to_sql(Sql::HavingClause.new(self)) }
+      end
+
+      def order_clauses
+        orders.collect { |o| o.to_sql(Sql::OrderClause.new(self)) }
+      end
   end
 end
diff --git a/lib/arel/engines/sql/relations/writes.rb b/lib/arel/engines/sql/relations/writes.rb
index 00cd61cdde..0a6250a3b9 100644
--- a/lib/arel/engines/sql/relations/writes.rb
+++ b/lib/arel/engines/sql/relations/writes.rb
@@ -10,7 +10,7 @@ module Arel
   end
 
   class Insert < Compound
-    def to_sql
+    def to_sql(include_returning = true)
       insertion_attributes_values_sql = if record.is_a?(Value)
         record.value
       else
@@ -33,7 +33,7 @@ module Arel
         "INSERT",
         "INTO #{table_sql}",
         insertion_attributes_values_sql,
-        ("RETURNING #{engine.quote_column_name(primary_key)}" if compiler.supports_insert_with_returning?)
+        ("RETURNING #{engine.quote_column_name(primary_key)}" if include_returning && compiler.supports_insert_with_returning?)
     end
   end