Bug #94025 TMPDIR not respected on Windows 10 with MySQL Server 8.0.14

• Submitted: 24 Jan 2019 4:04
• Modified: 28 Feb 2019 14:23
• Reporter: J Donley
• Status: No Feedback
• Category: MySQL Server: Windows
• Severity: S2 (Serious)
• Version: 8.0.14
• OS: Windows (1803)
• CPU Architecture: x86

[24 Jan 2019 4:04] J Donley

Description:
After setting tmpdir value to a directory in a drive that is not C:, the setting is ignored. Temp files are always written to C:\Windows\ServiceProfiles\NetworkService\AppData\Local\Temp

The issue is present through MySQL Client, Shell and Workbench.

How to repeat:
Against a table with a few million records, run a query that results in paging and storage of temporary data files on Windows 10. 

Expected: Files written to location specified in tmpdir
Actual: Files written to C:\Windows\ServiceProfiles\NetworkService\AppData\Local\Temp

[28 Jan 2019 14:23] MySQL Verification Team

Thank you for the bug report. Is there error messages in your err log file about temporary files?. Thanks.

[28 Jan 2019 14:23] MySQL Verification Team

Thank you for the bug report. Is there error messages in your err log file about temporary files?. Thanks.

[28 Jan 2019 16:16] MySQL Verification Team

Forgot to mention I couldn't repeat using the tmpdir with forward slash like: tmpdir=d:/tmp/mysql.

[1 Mar 2019 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".