1 files changed, 2 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 6d5151dfe4..be4ae47d09 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -344,14 +344,13 @@ module ActiveRecord
         if supports_extensions?
           res = exec_query "SELECT EXISTS(SELECT * FROM pg_available_extensions WHERE name = '#{name}' AND installed_version IS NOT NULL) as enabled",
             'SCHEMA'
-          res.column_types['enabled'].type_cast_from_database res.rows.first.first
+          res.cast_values.first
         end
       end
 
       def extensions
         if supports_extensions?
-          res = exec_query "SELECT extname from pg_extension", "SCHEMA"
-          res.rows.map { |r| res.column_types['extname'].type_cast_from_database r.first }
+          exec_query("SELECT extname from pg_extension", "SCHEMA").cast_values
         else
           super
         end