MySQL Bugs: #68145: GROUP_CONCAT with DISTINCT could return wrong result when rb-trees are on disk

Bug #68145	GROUP_CONCAT with DISTINCT could return wrong result when rb-trees are on disk
Submitted:	22 Jan 2013 17:15	Modified:	22 Jan 2013 18:43
Reporter:	Chehai WU	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Server: DML	Severity:	S2 (Serious)
Version:	5.5.29, 5.0.97, 5.1.69, 5.5.31, 5.7.1	OS:	Any
Assigned to:		CPU Architecture:	Any
Tags:	group_concat

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:

On *nix platforms use the split command e.g. split -b 50MB <my_large_archive> <my_split_archive_prefix>
On windows use WinZip or a similar utility to split the large file

MySQL dump file to redproduce the issue

Attachment: bug.sql (application/octet-stream, text), 10.63 KiB.

With 512K

Attachment: bug68145.txt (text/plain), 20.62 KiB.

With 16M

Attachment: bug68145_2.txt (text/plain), 5.87 KiB.