docs: update all references from libmysql to MariaDB Connector/C

Update dependency references across documentation to reflect the
migration from libmysql (GPL-2.0) to MariaDB Connector/C (LGPL-2.1).

Author: kcenon

README.kr.md

@@ -51,7 +51,7 @@ Database System Project는 프로덕션 수준의 엔터프라이즈급 C++20 da
 | 백엔드 | 버전 | 선택적 패키지 |
 |--------|------|--------------|
 | PostgreSQL | 12+ | `libpq-dev` |
-| MySQL | 8.0+ | `libmysqlclient-dev` |
+| MySQL | 8.0+ | `libmariadb-dev` (MariaDB Connector/C) |
 | SQLite | 3.35+ | `libsqlite3-dev` |
 | MongoDB | 5.0+ | `libmongoc-dev` |
 | Redis | 6.0+ | `libhiredis-dev` |
@@ -757,7 +757,7 @@ cd database_system
 
 # Install database dependencies via vcpkg (optional)
 vcpkg install libpqxx           # PostgreSQL
-vcpkg install libmysql          # MySQL
+vcpkg install libmariadb        # MySQL (MariaDB Connector/C)
 vcpkg install sqlite3           # SQLite
 vcpkg install mongo-cxx-driver  # MongoDB
 vcpkg install hiredis           # Redis
@@ -1104,8 +1104,8 @@ ninja
 # PostgreSQL support
 vcpkg install libpqxx openssl
 
-# MySQL support
-vcpkg install libmysql
+# MySQL support (via MariaDB Connector/C)
+vcpkg install libmariadb
 
 # SQLite support
 vcpkg install sqlite3

README.md

@@ -68,7 +68,7 @@ A modern C++20 database abstraction layer providing unified access to multiple d
 | Backend | Version | Optional Package |
 |---------|---------|------------------|
 | PostgreSQL | 12+ | `libpq-dev` |
-| MySQL | 8.0+ | `libmysqlclient-dev` |
+| MySQL | 8.0+ | `libmariadb-dev` (MariaDB Connector/C) |
 | SQLite | 3.35+ | `libsqlite3-dev` |
 | MongoDB | 5.0+ | `libmongoc-dev` |
 | Redis | 6.0+ | `libhiredis-dev` |
@@ -352,7 +352,7 @@ scripts\dependency.bat   # Windows
 scripts\build.bat        # Windows
 
 # Option 2: Manual CMake build
-vcpkg install libpqxx libmysql sqlite3 mongo-cxx-driver hiredis
+vcpkg install libpqxx libmariadb sqlite3 mongo-cxx-driver hiredis
 
 mkdir build && cd build
 cmake .. -DUSE_POSTGRESQL=ON -DUSE_SQLITE=ON

docs/FEATURES.md

@@ -1670,7 +1670,7 @@ kcenon.database
 
 **Optional** (for specific backends):
 - libpqxx (PostgreSQL)
-- libmysql (MySQL)
+- MariaDB Connector/C (MySQL)
 - sqlite3 (SQLite)
 - mongo-cxx-driver (MongoDB)
 - hiredis (Redis)

docs/PRODUCTION_QUALITY.md

@@ -322,7 +322,7 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Install dependencies
-        run: vcpkg install libpqxx libmysql sqlite3 mongo-cxx-driver hiredis
+        run: vcpkg install libpqxx libmariadb sqlite3 mongo-cxx-driver hiredis
 
       - name: Configure CMake
         run: |

docs/PROJECT_STRUCTURE.kr.md

@@ -511,7 +511,7 @@ endif()
 | 데이터베이스 | 라이브러리 | 버전 | vcpkg 패키지 |
 |----------|---------|---------|---------------|
 | PostgreSQL | libpqxx | 7.7+ | `libpqxx` |
-| MySQL | libmysql | 8.0+ | `libmysql` |
+| MySQL | libmariadb | 3.x+ | `libmariadb` |
 | SQLite | sqlite3 | 3.40+ | `sqlite3` |
 | MongoDB | mongo-cxx-driver | 3.7+ | `mongo-cxx-driver` |
 | Redis | hiredis | 1.1+ | `hiredis` |
@@ -531,7 +531,7 @@ endif()
 **vcpkg 사용**:
 ```bash
 # 데이터베이스 라이브러리 설치
-vcpkg install libpqxx openssl libmysql sqlite3 mongo-cxx-driver hiredis
+vcpkg install libpqxx openssl libmariadb sqlite3 mongo-cxx-driver hiredis
 
 # 선택적 시스템 설치 (가능한 경우)
 vcpkg install kcenon-common-system kcenon-thread-system

docs/PROJECT_STRUCTURE.md

@@ -193,7 +193,7 @@ database_system/
 - Stored procedures
 
 **Dependencies**:
-- libmysql (MySQL C client library)
+- MariaDB Connector/C (MySQL-compatible C client library, LGPL-2.1)
 - OpenSSL (for TLS/SSL)
 
 #### SQLite Backend
@@ -696,7 +696,7 @@ endif()
 | Database | Library | Version | vcpkg Package |
 |----------|---------|---------|---------------|
 | PostgreSQL | libpqxx | 7.7+ | `libpqxx` |
-| MySQL | libmysql | 8.0+ | `libmysql` |
+| MySQL | libmariadb | 3.x+ | `libmariadb` |
 | SQLite | sqlite3 | 3.40+ | `sqlite3` |
 | MongoDB | mongo-cxx-driver | 3.7+ | `mongo-cxx-driver` |
 | Redis | hiredis | 1.1+ | `hiredis` |
@@ -716,7 +716,7 @@ endif()
 **Using vcpkg**:
 ```bash
 # Install database libraries
-vcpkg install libpqxx openssl libmysql sqlite3 mongo-cxx-driver hiredis
+vcpkg install libpqxx openssl libmariadb sqlite3 mongo-cxx-driver hiredis
 
 # Install optional systems (if available)
 vcpkg install kcenon-common-system kcenon-thread-system

docs/analysis/BACKEND_USAGE_ANALYSIS.md

@@ -57,7 +57,7 @@ This document analyzes the usage patterns and maintenance considerations for Mon
 {
   "features": {
     "postgresql": { "dependencies": ["libpq", "libpqxx", "openssl"] },
-    "mysql": { "dependencies": ["libmysql"] },
+    "mysql": { "dependencies": ["libmariadb"] },
     "sqlite": { "dependencies": ["sqlite3"] }
     // MongoDB and Redis: NOT DEFINED
   }

docs/contributing/CONTRIBUTING.md

@@ -46,7 +46,7 @@ Before contributing, ensure you have:
 - Git
 - **Database-specific prerequisites**:
   - PostgreSQL development libraries (libpqxx, libpq, OpenSSL)
-  - MySQL development libraries (libmysql or mysql-connector-cpp)
+  - MySQL development libraries (MariaDB Connector/C, LGPL-2.1)
   - SQLite development library (sqlite3)
   - MongoDB C++ driver (mongocxx, bsoncxx)
   - Redis client library (hiredis)
@@ -100,7 +100,7 @@ cd vcpkg
 bootstrap-vcpkg.bat   # Windows
 
 # Install all database dependencies
-vcpkg install libpqxx openssl libmysql sqlite3 mongo-cxx-driver hiredis
+vcpkg install libpqxx openssl libmariadb sqlite3 mongo-cxx-driver hiredis
 ```
 
 #### Manual Installation
@@ -110,7 +110,7 @@ vcpkg install libpqxx openssl libmysql sqlite3 mongo-cxx-driver hiredis
 sudo apt-get update
 sudo apt-get install \
     libpqxx-dev libpq-dev libssl-dev \
-    libmysqlclient-dev \
+    libmariadb-dev \
     libsqlite3-dev \
     libmongocxx-dev libbsoncxx-dev \
     libhiredis-dev

docs/guides/BUILD_GUIDE.kr.md

@@ -31,7 +31,7 @@
 데이터베이스 지원은 선택 사항이며 테스트를 위해 비활성화할 수 있습니다:
 
 - **PostgreSQL**: libpqxx, libpq, OpenSSL 3.0+
-- **MySQL**: libmysql 또는 mysql-connector-cpp
+- **MySQL**: MariaDB Connector/C (LGPL-2.1, MySQL 와이어 호환)
 - **SQLite**: sqlite3
 - **MongoDB**: mongo-cxx-driver (mongocxx, bsoncxx)
 - **Redis**: hiredis
@@ -80,7 +80,7 @@ ninja
 | 옵션 | 기본값 | 설명 |
 |--------|---------|-------------|
 | `USE_POSTGRESQL` | ON | PostgreSQL 지원 활성화 (libpqxx 필요) |
-| `USE_MYSQL` | OFF | MySQL 지원 활성화 (libmysql 필요) |
+| `USE_MYSQL` | OFF | MySQL 지원 활성화 (MariaDB Connector/C 필요) |
 | `USE_SQLITE` | OFF | SQLite 지원 활성화 (sqlite3 필요) |
 | `USE_MONGODB` | OFF | MongoDB 지원 활성화 (mongocxx 필요) - **실험적** |
 | `USE_REDIS` | OFF | Redis 지원 활성화 (hiredis 필요) - **실험적** |
@@ -212,8 +212,8 @@ cd vcpkg
 # PostgreSQL 지원
 vcpkg install libpqxx openssl
 
-# MySQL 지원
-vcpkg install libmysql
+# MySQL 지원 (MariaDB Connector/C 사용)
+vcpkg install libmariadb
 
 # SQLite 지원
 vcpkg install sqlite3
@@ -225,7 +225,7 @@ vcpkg install mongo-cxx-driver
 vcpkg install hiredis
 
 # 한 번에 모두 설치
-vcpkg install libpqxx openssl libmysql sqlite3 mongo-cxx-driver hiredis
+vcpkg install libpqxx openssl libmariadb sqlite3 mongo-cxx-driver hiredis
 ```
 
 #### vcpkg로 빌드
@@ -248,8 +248,8 @@ cmake .. \
 # PostgreSQL
 sudo apt-get install libpqxx-dev libpq-dev libssl-dev
 
-# MySQL
-sudo apt-get install libmysqlclient-dev
+# MySQL (MariaDB Connector/C 사용)
+sudo apt-get install libmariadb-dev
 
 # SQLite
 sudo apt-get install libsqlite3-dev
@@ -267,8 +267,8 @@ sudo apt-get install libhiredis-dev
 # PostgreSQL
 sudo dnf install libpqxx-devel postgresql-devel openssl-devel
 
-# MySQL
-sudo dnf install mysql-devel
+# MySQL (MariaDB Connector/C 사용)
+sudo dnf install mariadb-connector-c-devel
 
 # SQLite
 sudo dnf install sqlite-devel
@@ -286,8 +286,8 @@ sudo dnf install hiredis-devel
 # PostgreSQL
 brew install libpqxx postgresql openssl
 
-# MySQL
-brew install mysql
+# MySQL (MariaDB Connector/C 사용)
+brew install mariadb-connector-c
 
 # SQLite
 brew install sqlite
@@ -662,7 +662,7 @@ RUN apt-get update && apt-get install -y \
     ninja-build \
     git \
     libpqxx-dev \
-    libmysqlclient-dev \
+    libmariadb-dev \
     libsqlite3-dev \
     && rm -rf /var/lib/apt/lists/*
 

docs/guides/BUILD_GUIDE.md

@@ -31,7 +31,7 @@ Comprehensive guide for building the Database System with multi-backend support,
 Database support is optional and can be disabled for testing:
 
 - **PostgreSQL**: libpqxx, libpq, OpenSSL 3.0+
-- **MySQL**: libmysql or mysql-connector-cpp
+- **MySQL**: MariaDB Connector/C (LGPL-2.1, wire-compatible with MySQL)
 - **SQLite**: sqlite3
 - **MongoDB**: mongo-cxx-driver (mongocxx, bsoncxx)
 - **Redis**: hiredis
@@ -80,7 +80,7 @@ ninja
 | Option | Default | Description |
 |--------|---------|-------------|
 | `USE_POSTGRESQL` | ON | Enable PostgreSQL support (requires libpqxx) |
-| `USE_MYSQL` | OFF | Enable MySQL support (requires libmysql) |
+| `USE_MYSQL` | OFF | Enable MySQL support (requires MariaDB Connector/C) |
 | `USE_SQLITE` | OFF | Enable SQLite support (requires sqlite3) |
 | `USE_MONGODB` | OFF | Enable MongoDB support (requires mongocxx) - **Experimental** |
 | `USE_REDIS` | OFF | Enable Redis support (requires hiredis) - **Experimental** |
@@ -212,8 +212,8 @@ cd vcpkg
 # PostgreSQL support
 vcpkg install libpqxx openssl
 
-# MySQL support
-vcpkg install libmysql
+# MySQL support (via MariaDB Connector/C)
+vcpkg install libmariadb
 
 # SQLite support
 vcpkg install sqlite3
@@ -225,7 +225,7 @@ vcpkg install mongo-cxx-driver
 vcpkg install hiredis
 
 # Install all at once
-vcpkg install libpqxx openssl libmysql sqlite3 mongo-cxx-driver hiredis
+vcpkg install libpqxx openssl libmariadb sqlite3 mongo-cxx-driver hiredis
 ```
 
 #### Build with vcpkg
@@ -248,8 +248,8 @@ cmake .. \
 # PostgreSQL
 sudo apt-get install libpqxx-dev libpq-dev libssl-dev
 
-# MySQL
-sudo apt-get install libmysqlclient-dev
+# MySQL (via MariaDB Connector/C)
+sudo apt-get install libmariadb-dev
 
 # SQLite
 sudo apt-get install libsqlite3-dev
@@ -267,8 +267,8 @@ sudo apt-get install libhiredis-dev
 # PostgreSQL
 sudo dnf install libpqxx-devel postgresql-devel openssl-devel
 
-# MySQL
-sudo dnf install mysql-devel
+# MySQL (via MariaDB Connector/C)
+sudo dnf install mariadb-connector-c-devel
 
 # SQLite
 sudo dnf install sqlite-devel
@@ -286,8 +286,8 @@ sudo dnf install hiredis-devel
 # PostgreSQL
 brew install libpqxx postgresql openssl
 
-# MySQL
-brew install mysql
+# MySQL (via MariaDB Connector/C)
+brew install mariadb-connector-c
 
 # SQLite
 brew install sqlite
@@ -662,7 +662,7 @@ RUN apt-get update && apt-get install -y \
     ninja-build \
     git \
     libpqxx-dev \
-    libmysqlclient-dev \
+    libmariadb-dev \
     libsqlite3-dev \
     && rm -rf /var/lib/apt/lists/*