1 files changed, 2 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/column.rb b/activerecord/lib/active_record/connection_adapters/postgresql/column.rb
index be13ead120..bfa03fa136 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/column.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/column.rb
@@ -8,7 +8,8 @@ module ActiveRecord
       def serial?
         return unless default_function
 
-        %r{\Anextval\('(?<table_name>.+)_#{name}_seq'::regclass\)\z} === default_function
+        table_name = @table_name || '(?<table_name>.+)'
+        %r{\Anextval\('"?#{table_name}_#{name}_seq"?'::regclass\)\z} === default_function
       end
     end
   end