router: preserve LONGTEXT and LONGBLOB column types in MRS

mysql-test/suite/router/r/table_type_long_blob.result

@@ -0,0 +1,40 @@
+# MySQL Rest Service schema created.
+# MySQL Rest Service, server accounts configured.
+
+# Registred SERVICE at path: /svc
+# Registred DB_SCHEMA at path: /svc/test
+# Registred DB_OBJECT at path: /svc/test/long_blob_types
+
+GET /svc/test/long_blob_types
+{
+    "resultSets": [
+        {
+            "type": "items0",
+            "items": [
+                {
+                    "long_text": "long text",
+                    "long_blob": "AQI="
+                }
+            ],
+            "_metadata": {
+                "columns": [
+                    {
+                        "name": "long_text",
+                        "type": "LONGTEXT"
+                    },
+                    {
+                        "name": "long_blob",
+                        "type": "LONGBLOB"
+                    }
+                ]
+            }
+        }
+    ]
+}
+OK
+DROP SCHEMA mysql_rest_service_metadata;
+DROP ROLE mysql_rest_service_admin;
+DROP ROLE mysql_rest_service_schema_admin;
+DROP ROLE mysql_rest_service_meta_provider;
+DROP ROLE mysql_rest_service_data_provider;
+DROP ROLE mysql_rest_service_dev;

mysql-test/suite/router/t/table_type_long_blob.test

@@ -0,0 +1,52 @@
+--source include/have_router.inc
+
+--let $extra_mrs_router_id=1
+--source ../include/predefined_setup/configure_router_mrs_root.inc
+
+--disable_query_log
+--disable_result_log
+CREATE TABLE test.long_blob_types(
+  id INTEGER PRIMARY KEY,
+  long_text LONGTEXT CHARACTER SET utf8mb4,
+  long_blob LONGBLOB);
+
+INSERT INTO test.long_blob_types VALUES (1, 'long text', 0x0102);
+
+DROP PROCEDURE IF EXISTS test.proc_long_blob_types;
+DELIMITER //;
+CREATE PROCEDURE test.proc_long_blob_types()
+BEGIN
+  SELECT long_text, long_blob FROM test.long_blob_types;
+END;//
+DELIMITER ;//
+--enable_query_log
+--enable_result_log
+
+--source ../include/mrs/start_object_definition.inc
+
+--let $mrs_add_service_path="/svc"
+--let $mrs_add_host_name=""
+--source ../include/mrs/service/add.inc
+
+--let $mrs_add_schema=test
+--let $mrs_add_schema_path=/test
+--source ../include/mrs/db_schema/add.inc
+
+--let $mrs_add_db_object_type=PROCEDURE
+--let $mrs_add_db_object=proc_long_blob_types
+--let $mrs_add_db_object_path=/long_blob_types
+--source ../include/mrs/db_object/add.inc
+
+--source ../include/mrs/end_object_definition.inc
+
+--let $mrs_host_and_port=127.0.0.1:$HTTP_SERVER_PORT
+--let MRS_CLIENT_ARGS=$MRS_CLIENT --url https://$mrs_host_and_port
+--exec $MRS_CLIENT_ARGS --path /svc/test/long_blob_types --wait-until-status 60
+
+--disable_query_log
+--disable_result_log
+DROP PROCEDURE test.proc_long_blob_types;
+DROP TABLE test.long_blob_types;
+--enable_query_log
+--enable_result_log
+--source ../include/mrs/cleanup.inc

router/src/mysql_rest_service/src/helper/mysql_column_types.cc

@@ -173,7 +173,8 @@ std::string txt_from_mysql_column_type(const MYSQL_FIELD *field) {
       if (field->charsetnr == 63) return "MEDIUMBLOB";
       return "MEDIUMTEXT";
     case MYSQL_TYPE_LONG_BLOB:
-      return "BLOB";
+      if (field->charsetnr == 63) return "LONGBLOB";
+      return "LONGTEXT";
     case MYSQL_TYPE_BLOB:
       if (field->charsetnr == 63) return "BLOB";
       return "TEXT";

router/src/mysql_rest_service/tests/CMakeLists.txt

@@ -44,6 +44,7 @@ ADD_TEST_FILE(test_plugin.cc
     ./test_mrs_authentication_rate_control.cc
     ./test_mrs_entities_manager.cc
     ./test_mrs_database_converters.cc
+    ./test_helper_mysql_column_types.cc
     ./test_mrs_database_rest_table.cc
     ./test_mrs_database_rest_table_get.cc
     ./test_mrs_database_rest_table_get_one.cc

router/src/mysql_rest_service/tests/test_helper_mysql_column_types.cc

@@ -0,0 +1,66 @@
+/*
+  Copyright (c) 2026, Oracle and/or its affiliates.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License, version 2.0,
+  as published by the Free Software Foundation.
+
+  This program is designed to work with certain software (including
+  but not limited to OpenSSL) that is licensed under separate terms,
+  as designated in a particular file or component or in included license
+  documentation.  The authors of MySQL hereby grant you an additional
+  permission to link the program and your derivative works with the
+  separately licensed software that they have either included with
+  the program or referenced in the documentation.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software Foundation,
+  Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include <gtest/gtest.h>
+
+#include <mysql.h>
+
+#include "helper/mysql_column_types.h"
+
+namespace {
+
+constexpr unsigned int kBinaryCharset = 63;
+constexpr unsigned int kUtf8mb4Charset = 255;
+
+struct BlobTypeData {
+  enum_field_types mysql_type;
+  unsigned int charsetnr;
+  const char *expected;
+};
+
+class BlobTypeTests : public testing::TestWithParam<BlobTypeData> {};
+
+TEST_P(BlobTypeTests, preserves_blob_family_type_name) {
+  MYSQL_FIELD field{};
+  const auto &param = GetParam();
+  field.type = param.mysql_type;
+  field.charsetnr = param.charsetnr;
+
+  EXPECT_EQ(param.expected, helper::txt_from_mysql_column_type(&field));
+}
+
+INSTANTIATE_TEST_SUITE_P(
+    BlobTypes, BlobTypeTests,
+    testing::Values(
+        BlobTypeData{MYSQL_TYPE_TINY_BLOB, kBinaryCharset, "TINYBLOB"},
+        BlobTypeData{MYSQL_TYPE_TINY_BLOB, kUtf8mb4Charset, "TINYTEXT"},
+        BlobTypeData{MYSQL_TYPE_MEDIUM_BLOB, kBinaryCharset, "MEDIUMBLOB"},
+        BlobTypeData{MYSQL_TYPE_MEDIUM_BLOB, kUtf8mb4Charset, "MEDIUMTEXT"},
+        BlobTypeData{MYSQL_TYPE_LONG_BLOB, kBinaryCharset, "LONGBLOB"},
+        BlobTypeData{MYSQL_TYPE_LONG_BLOB, kUtf8mb4Charset, "LONGTEXT"},
+        BlobTypeData{MYSQL_TYPE_BLOB, kBinaryCharset, "BLOB"},
+        BlobTypeData{MYSQL_TYPE_BLOB, kUtf8mb4Charset, "TEXT"}));
+
+}  // namespace