Add binary column default value support to sqlite

This adds support for reading binary column default values before the column data is read from the database.
This makes binary columns behave more like other column types with default values

activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb

@@ -430,6 +430,9 @@ def extract_value_from_default(default)
           # Numeric types
           when /\A-?\d+(\.\d*)?\z/
             $&
+          # Binary columns
+          when /x'(.*)'/
+            [ $1 ].pack("H*")
           else
             # Anything else is blank or some function
             # and we can't know the value of that, so return nil.

activerecord/test/cases/defaults_test.rb

@@ -83,6 +83,39 @@ def test_default_strings_containing_single_quotes
   end
 end
 
+if current_adapter?(:SQLite3Adapter, :PostgreSQLAdapter)
+  class DefaultBinaryTest < ActiveRecord::TestCase
+    class DefaultBinary < ActiveRecord::Base; end
+
+    setup do
+      @connection = ActiveRecord::Base.connection
+      @connection.create_table :default_binaries do |t|
+        t.binary :varbinary_col, null: false, limit: 64, default: "varbinary_default"
+        t.binary :varbinary_col_hex_looking, null: false, limit: 64, default: "0xDEADBEEF"
+      end
+      DefaultBinary.reset_column_information
+    end
+
+    def test_default_varbinary_string
+      assert_equal "varbinary_default", DefaultBinary.new.varbinary_col
+    end
+
+    if current_adapter?(:Mysql2Adapter) && !ActiveRecord::Base.connection.mariadb?
+      def test_default_binary_string
+        assert_equal "binary_default", DefaultBinary.new.binary_col
+      end
+    end
+
+    def test_default_varbinary_string_that_looks_like_hex
+      assert_equal "0xDEADBEEF", DefaultBinary.new.varbinary_col_hex_looking
+    end
+
+    teardown do
+      @connection.drop_table :default_binaries
+    end
+  end
+end
+
 if supports_text_column_with_default?
   class DefaultTextTest < ActiveRecord::TestCase
     class DefaultText < ActiveRecord::Base; end