Bug #91382 BeginExecuteReader fails on .net core

• Submitted: 23 Jun 2018 0:04
• Modified: 29 Jul 2018 9:37
• Reporter: Paul Wheeler
• Status: No Feedback
• Category: Connector / NET
• Severity: S3 (Non-critical)
• Version: 8.0.11
• OS: MacOS (10.13.4)
• Assigned to: Assigned Account
• CPU Architecture: x86
• Tags: async

[23 Jun 2018 0:04] Paul Wheeler

Description:
Attempting to call MySqlCommand.BeginExecuteReader fails with a PlatformNotSupportedException because it uses Delegate.BeginInvoke which is not supported in .net core. Delegate.BeginInvoke is a worthless function that should not be use because it only simulates asynchrony without actually utilizing asynchronous IO.

How to repeat:
Create an instance of MySqlCommand and call BeginExecuteReader.

Suggested fix:
Implement proper asynchronous IO, preferably using System.Threading.Tasks

[25 Jun 2018 7:57] Chiranjeevi Battula

Hello Paul Wheeler,

Thank you for the bug report.
Could you please provide repeatable steps (exact steps/sample project, full stack trace etc. - please make it as private if you prefer) to confirm this issue at our end?

Thanks,
Chiranjeevi.

[26 Jun 2018 14:20] Bradley Grainger

See bug #70111 for the feature request of adding true asynchronous methods to Connector/NET.

See https://github.com/mysql-net/MySqlConnector if you need a library that implements async I/O (and works on .NET Core) today.

[26 Jun 2018 14:23] Bradley Grainger

(Though note that MySqlConnector only supports the modern ExecuteReaderAsync API, not the APM-style Begin/EndExecuteReader.)

[28 Jun 2018 18:06] Paul Wheeler

Bradley,
Thank you for point out that package, I will definitely look into migrating to that!

-Paul

[30 Jul 2018 1:00] Bugs System

No feedback was provided for this bug for over a month, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".