RepoDb.Connector.MariaDb 0.0.1-alpha2

<div align="center"> <a href="https://www.nuget.org/packages/RepoDb.Connector.MariaDb"> <image src="logo.png" style="width:256px;" /> </a> <br/> <span style="font-size:16px;font-weight:bold;">A lightweight, modern, and open-source ADO.NET data provider for MariaDB, built for RepoDB.</span> </div>

Disclaimer: This is an independent, unofficial .NET provider for MariaDB. It is a thin ADO.NET wrapper and type-mapping layer built on top of MySql.Data and is not affiliated with or endorsed by MariaDB plc or the MariaDB Foundation.

The project aims to provide a dedicated MariaDB connector based on the standard System.Data.Common abstractions, while exposing MariaDB-specific data types, behaviors, and capabilities where applicable. All objects will be prefixed by MariaDb so it is more standardized in .NET.

It implements the Async equivalent of the MySql.Data that is dedicated for MariaDB. It also covers the full implementation of Bulk operations using the MySql.Data's MySqlBulkLoader class.

Status: Early development. The API and implementation are subject to change.

Why is this exists?

As RepoDB expands its support for data movement across various database providers, dedicated MariaDB objects are required within its extension library, RepoDb.MariaDb, to avoid class collisions with RepoDb.MySql and RepoDb.MySqlConnector. The same applies to its Bulk Operations extension, RepoDb.MariaDb.BulkOperations.

This library will serve as the official MariaDB connector for RepoDB and will be used internally by the RepoDB project.

Goals of the library

RepoDb.Connector.MariaDb aims to:

• Provide a dedicated ADO.NET data provider for MariaDB.
• Follow the standard System.Data.Common provider architecture.
• Support modern synchronous and asynchronous .NET APIs.
• Provide MariaDB-specific data type mappings and behaviors.
• Remain lightweight and suitable for use by ORMs and other data-access libraries.
• Support high-performance MariaDB operations, including bulk operations, in future releases.
• Remain usable independently of any ORM.

Core ADO.NET Objects

RepoDb.Connector.MariaDb is built around the standard abstractions provided by System.Data.Common.

The following provider-specific objects form the core of the connector:

The architecture follows the standard ADO.NET provider model:

System.Data.Common
│
├── DbConnection
│     └── MariaDbConnection
│
├── DbCommand
│     └── MariaDbCommand
│
├── DbDataReader
│     └── MariaDbDataReader
│
├── DbParameter
│     └── MariaDbParameter
│
├── DbParameterCollection
│     └── MariaDbParameterCollection
│
├── DbTransaction
│     └── MariaDbTransaction
│
├── DbException
│     └── MariaDbException
│
├── DbConnectionStringBuilder
│     └── MariaDbConnectionStringBuilder
│
└── DbProviderFactory
      └── MariaDbProviderFactory

Basic Usage

RepoDb.Connector.MariaDb is intended to provide the familiar ADO.NET programming model.

using RepoDb.Connector.MariaDb;

var connectionString =
    "Server=localhost;" +
    "Port=3306;" +
    "Database=TestDb;" +
    "User ID=root;" +
    "Password=password;";

await using var connection =
    new MariaDbConnection(connectionString);

await connection.OpenAsync();

await using var command = connection.CreateCommand();

command.CommandText = """
    SELECT Id, Name, Email
    FROM Customer
    WHERE Id = @Id;
    """;

command.Parameters.AddWithValue("@Id", 100);

await using var reader = await command.ExecuteReaderAsync();

while (await reader.ReadAsync())
{
    var id = reader.GetInt32(0);
    var name = reader.GetString(1);
    var email = reader.GetString(2);

    Console.WriteLine($"{id}: {name} ({email})");
}

MariaDbConnection

MariaDbConnection extends DbConnection and represents a connection to a MariaDB server.

await using var connection =
    new MariaDbConnection(connectionString);

await connection.OpenAsync();

Console.WriteLine(connection.ServerVersion);
Console.WriteLine(connection.Database);
Console.WriteLine(connection.State);

Its responsibilities include:

• Connection establishment and termination
• Connection state management
• MariaDB session management
• Command creation
• Transaction creation
• Connection string handling
• Synchronous and asynchronous operations

MariaDbCommand

MariaDbCommand extends DbCommand and represents a SQL statement executed against MariaDB.

await using var command = new MariaDbCommand(
    "SELECT * FROM Customer WHERE Id = @Id",
    connection);

command.Parameters.AddWithValue("@Id", 100);

await using var reader =
    await command.ExecuteReaderAsync();

The implementation is intended to support:

• ExecuteNonQuery
• ExecuteScalar
• ExecuteReader
• Async equivalents
• Parameterized SQL
• Prepared statements
• Command timeout
• Cancellation
• Multiple result sets

MariaDbParameter

MariaDbParameter extends DbParameter and represents a parameter associated with a MariaDbCommand.

var parameter = new MariaDbParameter
{
    ParameterName = "@Id",
    Value = 100
};

command.Parameters.Add(parameter);

A MariaDB-specific type system is also planned:

var parameter = new MariaDbParameter
{
    ParameterName = "@Id",
    MariaDbType = MariaDbType.Int,
    Value = 100
};

MariaDB Data Types

RepoDb.Connector.MariaDb aims to provide a MariaDbType enumeration in addition to the standard ADO.NET DbType.

The current set of types includes:

public enum MariaDbType
{
    TinyInt,
    SmallInt,
    MediumInt,
    Int,
    BigInt,

    Decimal,
    Float,
    Double,
    Bit,

    Char,
    VarChar,
    TinyText,
    Text,
    MediumText,
    LongText,
    Enum,
    Set,

    Binary,
    VarBinary,
    TinyBlob,
    Blob,
    MediumBlob,
    LongBlob,

    Date,
    Time,
    DateTime,
    Timestamp,
    Year,

    Json,

    Geometry,
    Point,
    LineString,
    Polygon,
    MultiPoint,
    MultiLineString,
    MultiPolygon,
    GeometryCollection
}

The connector will provide mappings between:

MariaDbType
     ↕
DbType
     ↕
.NET CLR Type
     ↕
MariaDB Server Type

MariaDbTypeConverter provides the current leg of that mapping, converting between MariaDbType and the underlying MySql.Data.MySqlClient.MySqlDbType:

var mariaDbType = MariaDbTypeConverter.ToMariaDbType(MySqlDbType.VarChar);
var mySqlDbType = MariaDbTypeConverter.ToMySqlDbType(MariaDbType.BigInt);

Transactions

MariaDbTransaction extends DbTransaction and provides standard ADO.NET transaction semantics.

await using var transaction =
    await connection.BeginTransactionAsync();

try
{
    await using var command = connection.CreateCommand();

    command.Transaction = transaction;

    command.CommandText =
        "UPDATE Customer SET Name = @Name WHERE Id = @Id";

    command.Parameters.AddWithValue("@Name", "John Doe");
    command.Parameters.AddWithValue("@Id", 100);

    await command.ExecuteNonQueryAsync();

    await transaction.CommitAsync();
}
catch
{
    await transaction.RollbackAsync();
    throw;
}

Connection String Builder

MariaDbConnectionStringBuilder extends DbConnectionStringBuilder and provides a strongly typed way of creating MariaDB connection strings.

var builder = new MariaDbConnectionStringBuilder
{
    Server = "localhost",
    Port = 3306,
    Database = "TestDb",
    UserId = "root",
    Password = "password"
};

await using var connection =
    new MariaDbConnection(builder.ConnectionString);

await connection.OpenAsync();

Provider Factory

MariaDbProviderFactory extends DbProviderFactory and enables provider-independent ADO.NET applications and libraries to create RepoDb.Connector.MariaDb objects.

var factory = MariaDbProviderFactory.Instance;

using var connection = factory.CreateConnection();

connection.ConnectionString = connectionString;
connection.Open();

Additional ADO.NET Support

Future releases may provide additional traditional ADO.NET components:

MariaDbDataAdapter
    └── DbDataAdapter

MariaDbCommandBuilder
    └── DbCommandBuilder

These components will provide support for DataTable, DataSet, and other traditional ADO.NET workflows.

The initial development effort will prioritize the core connection, command, parameter, transaction, and data-reader infrastructure.

Bulk Operations

RepoDb.Connector.MariaDb provides bulk-loading support under the RepoDb.Connector.MariaDb.Bulk namespace, built on top of LOAD DATA LOCAL INFILE via MySql.Data's MySqlBulkLoader.

MariaDbBulkCopy

MariaDbBulkCopy writes its source rows to a temporary file and loads them with MariaDbBulkLoader:

await using var connection =
    new MariaDbConnection(connectionString);

await connection.OpenAsync();

using var bulkCopy = new MariaDbBulkCopy(connection)
{
    DestinationTableName = "Customer",
    BatchSize = 10_000
};

bulkCopy.ColumnMappings.Add("Id", "Id");
bulkCopy.ColumnMappings.Add("Name", "Name");
bulkCopy.ColumnMappings.Add("Email", "Email");

await bulkCopy.WriteToServerAsync(customersDataTable);

Console.WriteLine(bulkCopy.RowsCopied);

WriteToServer/WriteToServerAsync are overloaded to accept an IDataReader, a DbDataReader, a DataTable (optionally filtered by DataRowState), or a DataRow[].

MariaDbBulkLoader

MariaDbBulkLoader can also be used directly for LOAD DATA LOCAL INFILE-style loading from a file or stream, without going through MariaDbBulkCopy:

var bulkLoader = new MariaDbBulkLoader(connection)
{
    TableName = "Customer",
    FileName = "customers.csv",
    FieldTerminator = ",",
    LineTerminator = "\n",
    Local = true
};

bulkLoader.Columns.Add("Id");
bulkLoader.Columns.Add("Name");
bulkLoader.Columns.Add("Email");

var rowsLoaded = await bulkLoader.LoadAsync();

Architecture

RepoDb.Connector.MariaDb is more than a set of ADO.NET wrapper classes. The public ADO.NET API will sit on top of the MariaDB communication and protocol infrastructure.

Application / ORM
       │
       ▼
MariaDbConnection
       │
       ▼
MariaDbCommand
       │
       ▼
MariaDB Session
       │
       ├── Authentication
       ├── TLS
       ├── Prepared Statements
       ├── Parameter Encoding
       ├── Result Set Parsing
       ├── Type Encoding/Decoding
       └── Cancellation
               │
               ▼
        MariaDB Protocol
               │
               ▼
              TCP
               │
               ▼
        MariaDB Server

Roadmap

The initial development will focus on the essential ADO.NET provider infrastructure:

1. MariaDbConnection
2. MariaDbCommand
3. MariaDbParameter
4. MariaDbParameterCollection
5. MariaDbDataReader
6. MariaDbTransaction
7. MariaDbException
8. MariaDbConnectionStringBuilder
9. MariaDbProviderFactory
10. MariaDbType and MariaDbTypeConverter
11. MariaDbBulkCopy, MariaDbBulkColumnMapping, MariaDbBulkCopyColumnMappingCollection, and MariaDbBulkLoader

Subsequent development may include:

• Connection pooling
• Prepared statements
• TLS/SSL
• Authentication mechanisms
• Cancellation
• Multiple result sets
• Advanced server metadata
• MariaDbDataAdapter
• MariaDbCommandBuilder
• Native (non LOAD DATA-based) bulk execution protocol
• Performance optimizations

ORM and Library Integration

Although RepoDb.Connector.MariaDb can be used directly through ADO.NET, it is designed to work naturally with libraries that operate against the standard System.Data.Common abstractions.

For example:

RepoDB
Dapper
Custom Data Access Layers
ADO.NET Applications
Other DbConnection-based Libraries
          │
          ▼
   RepoDb.Connector.MariaDb
          │
          ▼
      MariaDB Server

The connector itself should remain independent of any ORM.

Contributing

RepoDb.Connector.MariaDb is in its early stages, and contributions are welcome.

Areas where contributions will be particularly valuable include:

• MariaDB wire protocol implementation
• Authentication
• Type mappings
• Prepared statements
• Connection pooling
• TLS/SSL
• Async I/O
• MariaDB version compatibility
• Performance benchmarking
• Bulk operations
• Integration and compatibility testing

When contributing, please keep the implementation aligned with the standard ADO.NET architecture and avoid unnecessary abstractions that could negatively affect performance.

Changelog

See CHANGELOG.md for the release history of every connector in this repository.

License

RepoDb.Connector.MariaDb is an independent open-source project. MariaDB is a trademark of its respective owner. This project is not affiliated with, sponsored by, or endorsed by MariaDB plc or the MariaDB Foundation.

Apache License 2.0 — Copyright © 2026 Michael Camara Pendon

This project depends on Oracle's MySQL Connector/NET (MySql.Data), which is separately licensed under GPL-2.0 with the Universal FOSS Exception, Version 1.0.