fixed postgres tests

backends/postgres/src/postgres_connection.cpp

@@ -96,8 +96,8 @@ utils::result<std::unique_ptr<sql::query_result_impl>, utils::error> postgres_co
 
   std::vector<object::attribute_definition> prototype = context.prototype;
 
-  const auto num_col = PQnfields(res);
-  if (prototype.size() != num_col) {
+  const int num_col = PQnfields(res);
+  if (prototype.size() != static_cast<size_t>(num_col)) {
     return utils::failure(make_error(sql::error_code::FETCH_FAILED, res, conn_, "Number of received columns doesn't match expected columns.", context.sql));
   }
   for (int i = 0; i < num_col; ++i) {
@@ -170,7 +170,7 @@ utils::basic_type oid2type(const Oid oid) {
             return utils::basic_type::type_int32;
         case 20:
             return utils::basic_type::type_int64;
-        case 24:
+        case 25:
             return utils::basic_type::type_text;
         case 1043:
             return utils::basic_type::type_varchar;