1 files changed, 2 insertions, 31 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/column.rb b/activerecord/lib/active_record/connection_adapters/mysql/column.rb
index 9c45fdd44a..296d9a15f8 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/column.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/column.rb
@@ -2,22 +2,7 @@ module ActiveRecord
   module ConnectionAdapters
     module MySQL
       class Column < ConnectionAdapters::Column # :nodoc:
-        delegate :strict, :extra, to: :sql_type_metadata, allow_nil: true
-
-        def initialize(*)
-          super
-          assert_valid_default
-          extract_default
-        end
-
-        def has_default?
-          return false if blob_or_text_column? # MySQL forbids defaults on blob and text columns
-          super
-        end
-
-        def blob_or_text_column?
-          /\A(?:tiny|medium|long)?blob\b/ === sql_type || type == :text
-        end
+        delegate :extra, to: :sql_type_metadata, allow_nil: true
 
         def unsigned?
           /\bunsigned\z/ === sql_type
@@ -28,21 +13,7 @@ module ActiveRecord
         end
 
         def auto_increment?
-          extra == 'auto_increment'
-        end
-
-        private
-
-        def extract_default
-          if blob_or_text_column?
-            @default = null || strict ? nil : ''
-          end
-        end
-
-        def assert_valid_default
-          if blob_or_text_column? && default.present?
-            raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}"
-          end
+          extra == "auto_increment"
         end
       end
     end