MDEV-36737: Research and Estimation for Adapting VIDEX to MariaDB

VIDEX is a Disaggregated and Extensible Virtual Index Engine designed
to perform efficient and accurate what-if analysis for tasks such as
index recommendation.

Fix template linking error for gcc

debian: Add packaging for the VIDEX plugin

This commit adds the necessary files to build `mariadb-plugin-videx` as a separate Debian package.

- Add `COMPONENT videx-engine` to CMakeLists.txt to register the plugin.
- Define the `mariadb-plugin-videx` package in debian/control.
- Create `debian/mariadb-plugin-videx.install` to include the plugin .so and .cnf files.

debian: fix indent in debian/control

fix bugs from  empty table

videx: fix RPM autobake by adding CPACK summary/description

Author: YoungHypo

debian/control

@@ -1206,6 +1206,17 @@ Description: Snappy compression support in the server and storage engines
  Note that these affect InnoDB and Mroonga only;
  RocksDB still uses the compression algorithms from its own library
 
+Package: mariadb-plugin-videx
+Architecture: any
+Depends: mariadb-server (= ${server:Version}),
+         ${misc:Depends},
+         ${shlibs:Depends}
+Description: Virtual index engine for what-if analysis in MariaDB
+ The VIDEX storage engine allows developers and DBAs to perform what-if
+ analysis by evaluating the impact of potential indexes on query plans.
+ It simulates the cost and behavior of engines like InnoDB without requiring
+ the indexes to be physically built, saving significant time and resources.
+
 Package: mariadb-test
 Architecture: any
 Depends: libnet-ssleay-perl,

debian/mariadb-plugin-videx.install

@@ -0,0 +1,2 @@
+etc/mysql/mariadb.conf.d/videx.cnf
+usr/lib/mysql/plugin/ha_videx.so

storage/videx/CMakeLists.txt

@@ -0,0 +1,52 @@
+# Copyright (c) 2025 Bytedance Ltd. and 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 also distributed 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 included with MySQL.
+#
+# 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, version 2.0, 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
+
+# Check necessary dependencies
+FIND_PACKAGE(CURL)
+IF(NOT CURL_FOUND)
+  MESSAGE(STATUS "CURL not found. VIDEX will not be compiled")
+  RETURN()
+ENDIF()
+
+SET_PACKAGE_PROPERTIES(CURL PROPERTIES TYPE REQUIRED)
+SET(CPACK_RPM_videx-engine_PACKAGE_SUMMARY "VIDEX AI-enhanced virtual index engine for MariaDB" PARENT_SCOPE)
+SET(CPACK_RPM_videx-engine_PACKAGE_DESCRIPTION "VIDEX enables What-If Analysis via virtual indexes to simulate
+query plans, forwarding requests via HTTP to external AI servers for enhanced cost estimation." PARENT_SCOPE)
+
+INCLUDE_DIRECTORIES(
+        ${CMAKE_SOURCE_DIR}/sql
+        ${CMAKE_SOURCE_DIR}/include
+        ${CURL_INCLUDE_DIRS}
+        ${ZLIB_INCLUDE_DIRS}
+)
+
+SET(VIDEX_SOURCES
+        videx_utils.cc
+        ha_videx.cc
+)
+
+MYSQL_ADD_PLUGIN(videx
+        ${VIDEX_SOURCES}
+        STORAGE_ENGINE
+        LINK_LIBRARIES ${ZLIB_LIBRARIES} ${CURL_LIBRARIES}
+        COMPONENT videx-engine
+)