Bug #47650 using group by with rollup without indexes returns incorrect results with where
Submitted: 25 Sep 2009 16:53 Modified: 12 Mar 2010 17:20
Reporter: Derrek Leute Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: DML Severity:S3 (Non-critical)
Version:5.0.X, 5.1.39, next-mr OS:Any (Mac OS X Snow leopard, Linux)
Assigned to: Martin Hansson CPU Architecture:Any
Tags: count, GROUP, rollup, where

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