Bug #72588 MySQL creates large temporary tables with UNION ALL and strings
Submitted: 9 May 2014 3:41 Modified: 9 Jun 2014 8:19
Reporter: Andrew Dalgleish Email Updates:
Status: No Feedback Impact on me:
None 
Category:MySQL Server: Optimizer Severity:S3 (Non-critical)
Version:5.5.37 OS:Any
Assigned to: CPU Architecture:Any

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: