1 files changed, 5 insertions, 12 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
index fe00f9d750..adb9fcaeb8 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
@@ -256,7 +256,7 @@ module ActiveRecord
         name = name.to_s
         type = type.to_sym
 
-        if primary_key_column_name == name
+        if @columns_hash[name] && @columns_hash[name].primary_key?
           raise ArgumentError, "you can't redefine the primary key column '#{name}'. To define a custom primary key, pass { id: false } to create_table."
         end
 
@@ -270,7 +270,7 @@ module ActiveRecord
         @columns_hash.delete name.to_s
       end
 
-      [:string, :text, :integer, :float, :decimal, :datetime, :timestamp, :time, :date, :binary, :boolean].each do |column_type|
+      [:string, :text, :integer, :bigint, :float, :decimal, :datetime, :timestamp, :time, :date, :binary, :boolean].each do |column_type|
         define_method column_type do |*args|
           options = args.extract_options!
           column_names = args
@@ -318,7 +318,7 @@ module ActiveRecord
       alias :belongs_to :references
 
       def new_column_definition(name, type, options) # :nodoc:
-        type = aliased_types[type] || type
+        type = aliased_types(type.to_s, type)
         column = create_column_definition name, type
         limit = options.fetch(:limit) do
           native[type][:limit] if native[type].is_a?(Hash)
@@ -340,19 +340,12 @@ module ActiveRecord
         ColumnDefinition.new name, type
       end
 
-      def primary_key_column_name
-        primary_key_column = columns.detect { |c| c.primary_key? }
-        primary_key_column && primary_key_column.name
-      end
-
       def native
         @native
       end
 
-      def aliased_types
-        HashWithIndifferentAccess.new(
-          timestamp: :datetime,
-        )
+      def aliased_types(name, fallback)
+        'timestamp' == name ? :datetime : fallback
       end
     end