MySQL Bugs: #34364: LEFT JOIN with subquery takes very long time

Bug #34364	LEFT JOIN with subquery takes very long time
Submitted:	6 Feb 2008 21:17	Modified:	30 Jul 2012 17:14
Reporter:	Ratan Mohla	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Optimizer	Severity:	S1 (Critical)
Version:	5.1.22	OS:	Solaris (SunOS clapton.nms.fnc.fujitsu.com 5.10 Generic_118833-36 sun4u sparc SUNW,Ultra-4)
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:

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

test schema and some data populated

Attachment: omvmomua_small.dmp.gz (application/gzip, text), 398.09 KiB.

perl script to generate large data

Attachment: db_mysql_griphon_10wayjoin.pl (application/octet-stream, text), 9.60 KiB.