v2.4.0

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• Support .NET 9.0.
• Possibly breaking Mark MySqlConnectorLogManager.Provider as [Obsolete]: #​1397.
• Possibly breaking Remove end-of-life .NET 7 target framework.
  • Users who wish to use DbDataSource need to target .NET 8.0 or later.
• Possibly breaking Update dependencies:
  • Microsoft.Extensions.Logging.Abstractions from 7.0.1 to 8.0.2.
  • System.Diagnostics.DiagnosticSource from 7.0.2 to 8.0.1.
• Support trimming and native AOT: #​1265.
• Add MySqlDataSourceBuilder.UseConnectionOpenedCallback: #​1508.
• Add MySqlDbColumn.TableName: #​1521.
• Support zero-configuration SSL with MariaDB: #​1500.
• Support SET data type in functions: #​1491.
• Remove TABLESPACES schema: #​1477.
• Rewrite server redirection logic based on latest MariaDB specification: #​1499.
• Change variable name for better server compatibility: #​1502.
• Performance: Avoid SET NAMES commands when not necessary: #​1497.
• Fix "Can't replace active reader": #​1469.
• Fix potential NullReferenceException in MySqlConnection.Cancel: #​1506.
• Fix InvalidOperationException in FinishQuerying: #​1341.
• Provide logger to new MySqlConnection: #​1510.
• Use correct hostname when cancelling query: #​1514.
• Thanks to @​AlexKerman and @​rusher for contributions to this release.

v2.3.7

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• Fix NullReferenceException in MySqlDataReader.ActivateResultSet and MySqlDataReader.DisposeAsync: #​1459.
  • This bug likely also caused "Packet received out-of-order" errors.
  • This was introduced in 2.3.0.
• Fix rare NullReferenceException in ServerSession during cancellation: #​1472.
• Fix Foreign Keys schema not being generated asynchronously.

v2.3.6

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• Fix VerifyCA incompatibility with AWS Aurora: #​1462.
• Verify that the server's root certificate is present (in the list of provided CA certificates) when using the SslCa connection string option and SslMode is VerifyCA or VerifyFull.
• Optimization: Use pipelining to begin a transaction: #​1286.
  • Use Pipelining = False; in your connection string to disable this optimization if there are compatibility issues.
• Optimization: cache START TRANSACTION payloads.
• Add transaction logging: #​1411.
• Fix incompatibility with MySQL Server 5.1: #​1445.
  • This fixes a regression introduced in 2.3.0.
• Thanks to @​CRC32EX, @​dlenski, and @​rbanks54 for documentation contributions in this release.

v2.3.5

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• DLL files within the NuGet packages are now digitally signed.
• Thanks to Devolutions for sponsoring this change.

v2.3.4

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• Unify Application Name connection string option and MySqlDataSourceBuilder.UseName: #​1434.
• Remove TLS version fallback code: #​1409.
• Fix ArgumentOutOfRangeException in TimerQueue.Add: #​1424.
• Fix InvalidCastException when using stored procedures with MySQL 5.0: #​1431.
• Fix hang when disposing MySqlDataSource twice on .NET Framework.
• Thanks to @​SolacomYongYao for contributions to this release.

v2.3.3

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• Support COLUMN_NAME restriction for IndexColumns schema; this improves NHibernate compatibility.

v2.3.2

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• Add Foreign Keys, Indexes, Index Columns schemas: #​1419.
• Fix exception when server doesn't send expected metadata: #​1398.
• Clear activity tags when retrying TLS: #​1405.
• Use underlying enum type when writing binary parameters: #​1421.
• Avoid retrying TLS negotiation when a non-recoverable exception occurs.
• Thanks to @​daebo01, @​eaexo, and @​trejjam for contributions to this release.

v2.3.1

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MySqlConnector

• Add db.client.connections.timeouts counter to metrics: #​1392.
• Allow empty schemaRestrictions array to be passed to GetSchema: #​1394.
• Use higher-resolution timestamps for duration metrics: #​1395.
• Possibly Breaking Use seconds as the units for duration metrics; change type to double: #​1396.
• Thanks to @​Thorium for contributions to this release.

MySqlConnector.DependencyInjection

• Add AddKeyedMySqlDataSource to support keyed services: #​1391.
• Update Microsoft.Extensions.DependencyInjection.Abstractions dependency to 8.0.0.

v2.3.0

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• Support .NET 8.0.
  • Mark some serialization APIs as [Obsolete].
  • Implement DbBatchCommand.CreateParameter: #​1352.
  • Optimizations: Use IUtf8SpanFormattable, Ascii.FromUtf16, Guid(bigEndian: true) constructor, argument-throwing helpers, etc.
• Support .NET Framework 4.8 (net48) TFM: #​1355.
  • This allows TlsVersion = TLSv1.3 to be used on .NET Framework 4.8.
• Drop support for .NET 4.6.1 and .NET Core 3.1: #​636, #​1273.
  • .NET 4.6.1 support ended on 26 April 2022, and .NET Core 3.1 on 13 December 2022.
  • The minimum supported versions are now .NET Framework 4.6.2 and .NET 6.0, although other frameworks should be supported via netstandard2.0.
• MySqlDataSource is now available for all TFMs, not just .NET 7.0: #​1269.
  • This provides a single place to configure a MySQL connection and makes it easier to register MySqlConnection with dependency injection.
  • Add MySqlDataSourceBuilder class to configure MySqlDataSource instances.
  • Add MySqlDataSource.Name and MySqlDataSourceBuilder.UseName.
• Microsoft.Extensions.Logging is now used as the core logging abstraction: #​1110.
  • MySqlConnectorLogManager.Provider can still be used to add a logging destination, but it is now deprecated.
  • Use MySqlDataSourceBuilder.UseLoggerFactory to configure logging.
• Add new MySqlConnector.DependencyInjection package: #​1271.
  • MySqlDataSource and MySqlConnection can be registered with dependency injection by using builder.Services.AddMySqlDataSource(connectionString).
  • This also configures logging automatically.
• Expose connection pool metrics: #​491.
• Remove COM_MULTI protocol support: #​946.
• Support ZEROFILL columns in MySqlDecimal: #​1354.
• Support higher-precision DateTime values: #​1379.
• Use ValueTask in MySqlBulkCopy API for all TFMs: #​1364.
  • Breaking This changes the return type of WriteToServerAsync from Task<MySqlBulkCopyResult> to ValueTask<MySqlBulkCopyResult> on .NET Framework
• Support skipping metadata for prepared statements with MariaDB 10.6 and later: #​1301.
• Support multiple authentication methods when connecting: #​1303.
• Support per-query variables for CommandBehavior.SchemaOnly and SingleRow: #​1312.
• Recycle MySqlDataReader objects: #​1277.
• Perform XA rollback when preparing a transaction fails: #​1348.
• Implement faster parsing for result sets with multiple rows: #​1330.
• Optimize parameter encoding for ASCII strings: #​1296.
• Use TcpClient.ConnectAsync overload with CancellationToken on .NET 5.0 and later: #​1291.
• Fix cancellation when using a redirected connection: #​1305.
• Fix MySqlConnection.CloneWith for connections created from a MySqlDataSource: #​1306.
• Work around ephemeral PEM bug on Windows: #​1278.
• Reduce allocations on common code paths.
• Fix bug when column name begins with @ in MySqlBulkCopy: #​1365.
• Ignore MySqlDbType when serializing enum values: #​1384.
• Fix bug that didn't copy MySqlDataSource in MySqlConnection.Clone: #​1267.
• Fix version parsing for MariaDB 11.0 and later: #​1311.
• Fix potential error in reallocating an internal buffer when writing ASCII text.
• Update handling of ActivityStatus to latest conventions: #​1334.
• Reduce overhead of CommandTimeout: #​1338.
• Reword end-of-stream message to be more generic: #​1383.
• Thanks to @​gboucher90, @​JackBOBO, @​Kielek, @​rusher, and @​stilettk for contributions to this release.

v2.2.7

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• Respect ConnectTimeout when resetting connection: #​1321.
• Prevent connection pool falling back to an unsupported TLS version: #​1349.

v2.2.6

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• Ignore deadlock exception when rolling back an XA transaction: #​1317.
• Work around ephemeral PEM bug on Windows: #​1278.
• Support new MariaDB version numbers: #​1259.
• Thanks to @​rusher for contributions to this release.

v2.2.5

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• Add support for DECIMAL UNSIGNED, fixing error in DeriveParameters: #​1272.
• Fix parsing nan as float/double value on .NET Framework.

Full Changelog: mysql-net/MySqlConnector@2.2.4...2.2.5

v2.2.4

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• Fix a race condition in recovering leaked sessions: #​1263.
• Full Changelog: mysql-net/MySqlConnector@2.2.3...2.2.4

v2.2.3

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• Avoid renormalizing parameter names when executing a prepared command: #​1252.
• Fix "Unknown column SRS_ID" error in GetSchema: #​1258.
• Use a standardized value for the TableName property of the DataTable returned from GetSchema.
• Minor performance improvements.
  • Remove FormatInvariant internal helper method: #​1253.
  • Eliminate temporary byte array when getting real server version.
• Thanks to @​neuecc for contributions to this release.

v2.2.2

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• Fix memory leak when initializing a TLS connection: #​1247.
• Fix failure to dispose objects if an exception is thrown when connecting: #​1248.

Full Changelog: mysql-net/MySqlConnector@2.2.1...2.2.2

v2.2.1

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• Fix failure to load client SSL private key files: #​1242.
  • Builds for .NET 6.0 and later were not affected.

v2.2.0

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• Support .NET 7.0.
  • Add MySqlDataSource, an implementation of DbDataSource for MySQL: #​1208.
  • Use source-generated regular expressions.
  • Use UTF-8 literals to perform UTF-8 conversion at compile-time instead of runtime.
• Breaking Drop support for .NET 4.5: #​1209.
• Add DNS Check Interval connection string option: #​1201.
• Support restrictions in MySqlConnection.GetSchema.
  • Schema collections are code-generated: #​1190.
• Use user-provided callbacks when opening new connection to KILL QUERY: #​1179.
• Set activity tags when opening a connection fails: #​1196.
• Raise Component.Disposed event from MySqlConnection.DisposeAsync: #​1235.
• Use ValueTask instead of ValueTask<int>: #​1233.
  • Breaking This changes the return type of MySqlConnection.ResetConnectionAsync for netstandard2.0, net461, net471.
• Possibly Breaking Normalize the order of keys in the connection string returned by MySqlConnectionStringBuilder.ConnectionString: #​1217.
• Possibly Breaking Update dependencies.
  • Update System.Diagnostics.DiagnosticSource to 6.0.0.
  • Update System.Memory to 4.5.5.
  • Update System.Threading.Tasks.Extensions to 4.5.4: #​1144.

v2.1.13

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• Swallow (but log) exceptions in MySqlDataReader.Dispose(Async): #​1154.
• Add MySqlDataReader.GetBytes(string): #​1197.
• Eliminate allocation in OnStatementBegin: #​1207.
• Thanks to @​CorentinPtrl and @​iamcarbon for contributions to this release.

v2.1.12

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• Support new character sets added in MySQL Server 8.0.30.

v2.1.11

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• Fix NullReferenceException in MySqlConnector.Utilities.TimerQueue.Callback: #​1177.
• Support floating point infinity: #​1185.
• Thanks to @​maicodio for contributions to this release.

v2.1.10

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• Add MySqlBulkCopy.ConflictOption setting: #​1176.
• Thanks to @​klym1 for contributions to this release.

v2.1.9

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• Set Activity status to ERROR if an exception occurs during ExecuteReader: #​1171.
• SSL Mode = Disabled is supported as a synonym for SSL Mode = None: #​1168.
  • Added MySqlSslMode.Disabled enum value.
• MySqlAttribute implements ICloneable: #​1169.
• (Internal) Unix domain socket connection uses UnixDomainSocketEndPoint class: #​1160.
• Thanks to @​qq362220083 for contributions to this release.

v2.1.8

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• Fix bug that reset MySqlCommand.LastInsertedId to -1 between commands: #​1147.
• Fix bug using MySqlBulkCopy with DateOnly and TimeOnly: #​1146.

Full Changelog: mysql-net/MySqlConnector@2.1.7...2.1.8

v2.1.7

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• MySqlCommand no longer automatically appends a semicolon to the user-provided CommandText: #​1133.
  • This improves compatibility with Sphinx Search (SphinxQL).
• MySqlBulkCopy supports MySqlDecimal, BigInteger, DateOnly, TimeOnly: #​1143.
• Fix InvalidOperationException when the TLS Version connection string option contains multiple values: #​1138.

v2.1.6

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• Fix unintentional TLS downgrade: #​1132.
  • To ensure the desired TLS version is used, set TlsVersion in your connection string.
• Fix deadlock when cancelling a command: #​1131.
• Fix ArgumentException when calling GetSchema("Parameters") against MySQL 8.0: #​1128.
• Set MySqlParameter.Size in DeriveParameters: #​1125.
• Thanks to @​ahydrax and @​lostatredrock for contributions to this release.

v2.1.5

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• Speed up MySqlDataAdapter.Update when UpdateBatchSize is large: #​1124.
• Remove DO SLEEP(0) use after cancelling a query: #​1115.
  • This improves compatibility with MariaDB Xpand.
• Encode NUL bytes as \0 on the wire: #​1121.
  • This improves compatibility with SingleStore.

v2.1.4

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• Fix InvalidOperationException if MySqlDataReader.RecordsAffected was read after calling Close() or Dispose(): #​1122.
  • This was a regression introduced by #​1096 in 2.1.3.

v2.1.3

Compare Source

• Fix Use Compression = True when running under .NET 6.0: #​1120.
• Fix calculation of affected rows (the return value of ExecuteNonQuery) for compound statements: #​1096.
• Use a better FormatException message when a GUID can't be read: #​1114.
• Use cryptographic one-shot operations on .NET 5.0 and later.
• Performance: Use SkipLocalsInit where possible.

v2.1.2

Compare Source

• Fix incorrect results when using prepared commands with MySQL Server 8.0.23–8.0.25: #​1106.
  • Those server versions advertise support for query attributes, but do not fully support them for prepared statements.
  • The server-side bug is triggered by the client-side support for query attributes added in MySqlConnector 2.1.0.

v2.1.1

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• Fix InvalidOperationException when OpenAsync is called again after being canceled: #​1097.
• Allow OpenAsync to be canceled earlier.

v2.1.0

Compare Source

• Opening a connection from the pool is now twice as fast: #​1089.
  • This may fail with Amazon Aurora RDS; to explicitly disable this, set Pipelining = False; in the connection string.
• Add support for query attributes: #​930.
  • This requires MySQL Server 8.0.23 (or later) for regular commands, and MySQL Server 8.0.26 (or later) for prepared commands.
  • Add attributes to the MySqlCommand.Attributes collection to send them to the server when the command is executed.
• Add MySqlDecimal support: #​1070.
• Improve MySqlDataReader.GetX exceptions for NULL values: #​1092.
• Improve detection of Azure Database for MySQL proxies: #​1093.
• Update Microsoft.SourceLink.GitHub.
• Thanks to @​ejball and @​sumitdvlp for contributions to this release.

MySqlConnector.Logging.Microsoft.Extensions.Logging

• Logger names are now prefixed with MySqlConnector. by default: #​1080.
  • To return to the previous behavior, use MicrosoftExtensionsLoggingLoggerProvider(loggingFactory, omitMySqlConnectorPrefix: true).
• Added .UseMySqlConnectorLogging() extension method to add logging easily.

v2.0.0

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• Target .NET 6.0.
  • Breaking Update the MySqlBatch (experimental API) to match .NET 6.0 API changes.
  • Support DateOnly and TimeOnly structs: #​963.
  • Use ZLibStream for compression: #​957.
  • Use X_OR_GREATER preprocessor definitions: #​958.
• Breaking Improve MySqlBulkCopy API: #​1012.
• Breaking Remove ConnectionIdlePingTime: #​1042.
  • The Connection Idle Ping Time connection string option is still accepted, but has no effect.
  • If Connection Reset = False, MySqlConnection.Open will return a pooled connection (if one is available) without testing it for liveness (by pinging the server). If the server has closed the pooled connection, MySqlConnection.Open will succeed, but the first operation on that connection will fail. Command execution should be wrapped in a try/catch/retry loop to handle this scenario.
  • Connection Reset = False improves performance but may degrade reliability; Connection Reset = True, which is the default, is still recommended for greatest reliability.
• Breaking Change how option keys are serialized when retrieving the MySqlConnectionStringBuilder.ConnectionString property:
  • For example, User Id is now User ID, DefaultCommandTimeout is now Default Command Timeout, etc.
  • All existing connection strings are still valid, and all the previous aliases for connection string options are still accepted.
  • The primary connection string option key is listed first in the documentation at https://mysqlconnector.net/connection-options/.
• Breaking Seal MySqlCommandBuilder and MySqlConversionException.
• Remove netstandard1.3 and netcoreapp2.1 target frameworks: #​1031, #​1067.
• Add ActivitySource for tracing: #​1036.
• Reduce default log message severity: #​981.
• Add MySqlConnection.ProvideClientCertificatesCallback, MySqlConnection.ProvidePasswordCallback, MySqlConnection.RemoteCertificateValidationCallback: #​800, #​976.
• Support BigInteger as parameter value: #​1069.
• Add more values to MySqlErrorCode: #​1048.
• Make MySqlError.Code obsolete: #​1011.
  • Use ErrorCode property instead.
• Remove BackgroundConnectionResetHelper: #​1013.
  • MySqlConnectionStringBuilder.DeferConnectionReset is obsolete and will always be treated as if it's true.
• Add NuGet package READMEs: #​1053.
• Add [Category], [DefaultValue], and [Description] attributes to all MySqlConnectionStringBuilder properties.
• Improve performance of Regex usage internally.
• Throw an informative exception if DELIMITER is used in a SQL statement: #​1010.
• Fix MySqlConnectionStringBuilder.TryGetValue: #​1030.
• Fix incorrect value for MySqlCommand.LastInsertedId when executing multiple commands: #​1026.
• Fix bug executing stored procedures with backticks in their names: #​1029.
• Fix rare ObjectDisposedException that could be thrown when a connection timeout occurred.

v1.3.14

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• Fix bug that failed to deserialize a binary row (from a prepared statement) correctly: #​1018.

v1.3.13

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• Remove inner exception for UnableToConnectToHost exception: #​1035.
• Reword "recovering leaked sessions" log message.

v1.3.12

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• Fix bug executing stored procedures with backticks in their names: #​1029.

v1.3.11

Compare Source

• Add MySqlError.ErrorCode: #​1011.
• Allow MySqlDataReader.GetDateTime to read a VARCHAR column as a DateTime: #​980.
• Support the NEWDATE column type: #​1007.

v1.3.10

Compare Source

• Handle NoBackslashEscapes for binary parameter values: #​999.
• Fix NotSupportedException when cancelling a MySqlCommand in a TransactionScope: #​1001.
• Ignore InvalidOperationException thrown from MySqlConnection.Cancel: #​1002.
• Set the default value of DeferConnectionReset to true; this disables background connection reset and restores the pre-1.3 behavior.
• Thanks to @​kpreisser for contributions to this release.

v1.3.9

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• Use StringBuilder.GetChunks (in .NET 5.0) for MySqlParameter: #​977.
• Fix error encoding multibyte characters in MySqlBulkCopy: #​974.
• Fix error encoding multibyte characters for StringBuilder MySqlParameter values in .NET 5.0.

v1.3.8

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• Reduce latency of resetting connections: #​982.

v1.3.7

Compare Source

• Add support for SingleStore: #​968.
• Thanks to @​carlsverre and @​tavanesov-ua for contributions to this release.

v1.3.6

Compare Source

• Add NuGet Package ReadMe: #​978.

v1.3.5

Compare Source

• Support StringBuilder, Memory<char>, and ReadOnlyMemory<char> as MySqlParameter.Value values: #​975.
• Fix ArgumentException in MySqlBulkCopy: #​974.

v1.3.4

Compare Source

• Improve compatibility with MySQL Server 8.0.24:
  • Ignore new ER_CLIENT_INTERACTION_TIMEOUT error packet sent to timed-out connections: #​970.
  • Known Issue: Connections with UseCompression=true may throw a MySqlProtocolException when timed out.

v1.3.3

Compare Source

• Support Enum parameters in prepared commands: #​965.
• Fix OverflowException reading OkPayload: #​966.
• Fix internal SQL parsing error with C-style comments.

v1.3.2

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• Fix a bug that could cause a timed-out query to still throw a QueryInterrupted MySqlException instead of CommandTimeoutExpired.

v1.3.1

Compare Source

• Remove two new Info log messages added in 1.3.0: #​956.
  • The equivalent messages in 1.2.1 were at Debug level.
• Make Adler32 class internal.
  • This was not intended to be added to the public API in 1.3.0.

v1.3.0

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• Connections are now reset asynchronously in the background: #​178.
  • This speeds up MySqlConnection.Open(Async) but still cleans up connections between uses.
  • Use DeferConnectionReset=true in the connection string to revert to the old behaviour.
  • Experimental Use ConnectionIdlePingTime=300 in the connection string to avoid any network I/O when retrieving a connection from the pool; this is fastest but may return invalid connections from Open. This setting is experimental and may change in the future.
• Change default value of IgnorePrepare to false: #​929.
  • Calling MySqlCommand.Prepare(Async) will have an effect by default.
• Implement Azure Server Redirection: #​789.
  • Support community protocol for server redirection: #​945.
• Support MemoryStream as a value for MySqlParameter.Value: #​943.
• Implement MySqlException.IsTransient: #​849.
• Implement IComparable<MySqlDateTime> and IEquatable<MySqlDateTime> on MySqlDateTime.
• Breaking Remove public constructor for MySqlConversionException.
  • This constructor was never intended to be public.
• Implement serialization for exceptions.
• Report CommandTimeoutExpired consistently: #​939.
  • This changes the MySqlException.ErrorCode from QueryInterrupted to CommandTimeoutExpired.
• Nagle's Algorithm is disabled on TCP sockets: #​921.
• Adler32 checksum (for compressed packets) uses hardware acceleration: #​865.
• Set timeouts for cancellation operations from CancellationTimeout connection string option: #​951.
• Throw OperationCanceledException from OpenAsync when the CancellationToken is cancelled: #​931.
• Use transaction for 'SHOW WARNINGS': #​918.
• Improve exception message for unsupported parameter types: #​925.
• Fix exception in server version parsing: #​934.
• Fix silent failure to use TLS 1.3 (when explicitly requested) on older frameworks.
• Fix error deserialising MySqlException.ErrorCode property.
• Prevent exceptions being thrown from MySqlTransaction.Dispose: #​923.
• Fix nested MySqlException (thrown in some scenarios from ExecuteReader).
• Use .NET 5.0 methods to load PEM certificates.
• Thanks to @​novak-as for contributions to this release.

v1.2.1

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• Fix bug in extracting PEM data when there's extra data in the certificate file: #​912.
• Thanks to @​lauxjpn for contributions to this release.

v1.2.0

Compare Source

• Add TlsCipherSuites connection string option for fine-grained control of TLS cipher suites: #​904.
  • This option is only supported on Linux when using .NET Core 3.1 or .NET 5.0 or later.
• Fix bug loading GUIDs with MySqlBulkCopy.

v1.1.0

Compare Source

• Support .NET 5.0.
• Cancel query (server-side) when CommandTimeout expires: #​455.
  • Add CancellationTimeout connection string option.
  • Implementation details discussed in this comment.
• Return null from MySqlDataReader.GetSchemaTable when there is no result set: #​877.
• Make DisposeAsync fully async: #​876.
• Ignore ObjectDisposedException thrown in TryResetConnectionAsync: #​897.
• Ignore closed/disposed connections/commands in MySqlCommand.Cancel: #​820.
• Fix bug where sessions could time out if they were opened but no queries were ever executed.
• Thanks to @​dlemstra and @​laurent-jeancler-realist for contributions to this release.

v1.0.1

Compare Source

• Support ENUM columns that use the MYSQL_TYPE_ENUM type in their column metadata: #​850.
• Allow MySqlCommand.CommandText and .Connection to be changed while another command is executing: #​867.
• Make schema collection names (for MySqlConnection.GetSchema(collectionName)) case-insensitive: #​852.
• Fix MySqlBulkLoader with Azure Database for MySQL/MariaDB: #​853.
• Fix bug preventing the retrieval of more than 2³¹-1 rows in a single query: #​863.
• Fix MySqlParameterCollection.Insert implementation: #​869.
• Fix integer overflow in sequence number for compressed packets.
• Fix ZLIB header flags verification for compressed packets.
• Thanks to @​akamor for contributions to this release.