Bug #119418 MyISAM ALTER TABLE random fails
Submitted: 18 Nov 8:23 Modified: 25 Nov 11:21
Reporter: Jukka Kangas Email Updates:
Status: Open Impact on me:
None 
Category:MySQL Server: MyISAM storage engine Severity:S3 (Non-critical)
Version:8.4.7 OS:Any
Assigned to: CPU Architecture:Any
Tags: MYISAM engine

File: Maximum allowed size is 50MB.
Description:
Privacy:

If the data you need to attach is more than 50MB, you should create a compressed archive of the data, split it to 50MB chunks, and upload each of them as a separate attachment.

To split a large file:

[20 Nov 5:11] Jukka Kangas
Screenshot of the error in Sequel Ace, same error when using php mysqli.

Attachment: Screenshot 2025-11-20 at 7.09.42.png (image/png, text), 60.52 KiB.