MySQL Bugs: #38049: incorrect rows estimations with references from preceding table

Bug #38049	incorrect rows estimations with references from preceding table
Submitted:	11 Jul 2008 14:50	Modified:	16 Nov 2010 3:52
Reporter:	Ruslan Zakirov	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Optimizer	Severity:	S5 (Performance)
Version:	5.0.60, 5.0.68-bzr, 5.1.28-bzr	OS:	Any
Assigned to:	Guilhem Bichot	CPU Architecture:	Any
Tags:	INDEX, multiple-column index, preceding table, ref, rows

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

scripts to reproduce the problem

Attachment: ref_scan_with_preceding_table.tar.gz (application/gzip, text), 1.11 KiB.

updated create_data.pl

Attachment: create_data.pl (text/x-perl), 1.26 KiB.