2 files changed, 7 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
index a80025e7a7..341b104f06 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb
@@ -139,6 +139,10 @@ module ActiveRecord
         execute "INSERT INTO #{table_name} (#{fixture.key_list}) VALUES (#{fixture.value_list})", 'Fixture Insert'
       end
 
+      def empty_insert_statement(table_name)
+        "INSERT INTO #{table_name} VALUES(DEFAULT)"
+      end
+
       protected
         # Returns an array of record hashes with the column names as keys and
         # column values as values.
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb
index 2b78c300f5..c171b0239e 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb
@@ -247,6 +247,9 @@ module ActiveRecord
         alter_table(table_name, :rename => {column_name.to_s => new_column_name.to_s})
       end
 
+      def empty_insert_statement(table_name)
+        "INSERT INTO #{table_name} VALUES(NULL)"
+      end
 
       protected
         def select(sql, name = nil) #:nodoc: