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From:Hery Ramilison Date:November 11 2014 11:12pm
Subject:MySQL Connector/NET 6.8.4 has been released
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Dear MySQL users,

MySQL Connector/Net 6.8.4 is a maintenance release for the 6.8.x
series of the .NET driver for MySQL. It can be used for production

It is appropriate for use with MySQL server versions 5.5-5.7.

It is now available in source and binary form from
(note that not all mirror sites may be up to date at this point-if you
can't find this version on some mirror, please try again later or choose
another download site.)

Changes in MySQL Connector/Net 6.8.4 (2014-11-11)

Bugs Fixed

   * Generated code that matched against the start of a
     VARCHAR/CHAR column now correctly uses "LIKE" instead of
     location functions for the LINQ to Entity operators
     "StartsWith", "Contains", and "EndsWith". Locate
     functions do not make use of indexes placed on the
     VARCHAR/CHAR columns, which caused significant
     performance degradation. (Bug #19783747, Bug #19680236,
     Bug #72058)

   * Creating a Geometry Column with an SRID value would not
     save the value to the table. (Bug #19783444, Bug
     #19137999, Bug #19476721, Bug #71869)

   * Generated SQL was missing several clauses, such as
     OrderBy, GroupBy, and Skip), in cases that involved the
     "let" keyword, or in other scenarios that were translated
     into a DbApplyExpression. (Bug #19698010, Bug #19783760,
     Bug #73549)

   * LINQ to Entities queries failed for the cases that
     contained a predicate using IList.Contains with an
     argument of "DbCastExpression, DbConstantExpression,
     DbParameterReferenceExpression". (Bug #19690370, Bug
     #19783755, Bug #73643)

   * A SELECT query that had a nullable DATETIME field in a
     child .Any() clause with an .OrderBy() would fail and
     emit a NotImplementedException exception. (Bug #19681723,
     Bug #19795751, Bug #70722)

   * The query optimization routine would return statements
     with invalid table aliases when nested queries were being
     optimized. This would throw an "Unknown column"
     exception. (Bug #19681348, Bug #72004)

   * The "Feature will be installed when required" option was
     removed from the features list in the Connector/Net
     installer due to it not supporting on-demand
     installations because of dependencies with the
     assemblies. (Bug #19670596, Bug #19681113)

   * The fluent API DbModelBuilder.HasColumnType had no effect
     in Entity Framework 6. (Bug #19476922, Bug #19456229, Bug

   * Creating a "Model First" or "Database First" model using
     MySQL 5.7 would set ProviderManifestToken to 5.6. (Bug

   * Setting a Primary Key GUID identity in "Code First" in
     Entity Framework 6 did not function with MySQL server
     5.7. Inserting a row with a valid value for the GUID
     generated an error, even when it had a trigger set to the
     correct value.
     As a workaround, it was necessary to redeclare the column
     definition to accept a dummy default, such as "default
     ''". (Bug #19456452, Bug #19462811, Bug #19476995)

   * Non Primary Keys declared as "Identity GUID" did not have
     their GUID's automatically generated. (Bug #19456415, Bug
     #19461919, Bug #19477029)

   * "LINQ to Entities" queries that used Views with the Take
     operator were not correctly generated. This problem
     affected EF "Database First" scenarios. (Bug #19356006,
     Bug #19789288, Bug #72148)

   * Calling >MySqlConnection.GetSchema("PROCEDURES WITH
     PARAMETERS", ...) would generate an error about a
     non-existent index. This affected Intellisense when
     completing stored procedures. (Bug #19289402)

   * Adding a new column to an existing model as identity and
     PK failed when applying the migration. The generated
     error was: "Incorrect table definition; there can be only
     one auto column and it must be defined as a key". (Bug
     #19268382, Bug #19286383)

   * When using Entity Framework 4.3 Code first Identifiers
     for Migrations and Entity Framework 6, generated foreign
     s_foreign_key) identifiers could be longer than 64
     characters, causing MySQLException errors. The fix
     renames any too-long identifiers using the name format
     FK_guid, where guid is a global unique identifier
     generated at runtime. (Bug #19211564, Bug #19483128)
     References: This bug is a regression of Bug #67285.

   * In Visual Studio, Connector/Net did not read the
     millisecond portion of a time value for a field of type
     TIME(3). (Bug #19211409, Bug #18111085)

   * When the connection limit was exceeded,
     MySqlConnection.Open() would leave the TCP connections in
     a CLOSE_WAIT state, but now closes them. (Bug #18665388,
     Bug #72025)

   * When a client refreshed a web page associated with an
     expired session and if the ASP.NET project was using
     <SessionState ... regenerateExpiredSessionId="true" ...>,
     a "duplicate entry" exception was generated from the
     MySqlSessionProvider. (Bug #18657550, Bug #19783515, Bug

   * Entity Framework threw a NullReferenceException on
     insertion of a record into tables that had an
     auto-increment, unsigned, bigint primary key. (Bug
     #18189217, Bug #19211404, Bug #71242)

   * "MaximumPoolSize" and "MinimumPoolSize" were not
     recognized as valid connection string options. (Bug
     #18182246, Bug #19484670)

   * When Connector/Net's SQL generator emitted code for the
     LINQ Union() or Concat() operator, parentheses were not
     applied around the individual SELECT statements. That
     could cause a change of meaning for the query when a
     Take() operator (thus a LIMIT clause in the SQL code) was
     applied to the last SELECT statement. With this fix,
     parentheses were put around individual SELECT statements,
     so that the LIMIT clause will not be applied to the
     entire result of the UNION operation. (Bug #18049691, Bug
     #19211182, Bug #19483110, Bug #70828)

   * During migrations with ASP.NET Identity 1.0 in Visual
     Studio, the code generator did not generate the indexes
     and foreign keys in the Up() class. (Bug #18049272, Bug
     #19483069, Bug #71287)

   * The value for the Keepalive option in the connection
     string was interpreted by Connector/Net to be in
     milliseconds. This fix makes it to be interpreted as
     number of seconds, as specified in the documentation.
     (Bug #17981275, Bug #19211293, Bug #69484)

   * When using the Code First approach in Entity Framework 5,
     a LINQ query that checked whether a nullable column was
     null resulted in a faulty SQL query being generated. (Bug
     #17285548, Bug #69922)

The documentation is available at:

Nuget packages are available at:

Enjoy and thanks for the support!

On behalf of the MySQL Connector/NET and the MySQL/ORACLE RE Team.
MySQL Connector/NET 6.8.4 has been releasedHery Ramilison11 Nov