MySQL Bugs: #85834: InnoDB: Very slow select query with many tables and IS NULL in where clause

Bug #85834	InnoDB: Very slow select query with many tables and IS NULL in where clause
Submitted:	6 Apr 2017 13:31	Modified:	1 Aug 2017 10:13
Reporter:	Vassilis Kary	Email Updates:
Status:	Duplicate	Impact on me:	None
Category:	MySQL Server: Optimizer	Severity:	S5 (Performance)
Version:	5.7.17	OS:	Windows
Assigned to:		CPU Architecture:	Any
Tags:	in null, innodb, SELECT, slow query, where, windows

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

Full MySQL test dump with InnoDB as engine

Attachment: bug-report-sql-test-dump-innodb.sql (application/octet-stream, text), 28.21 KiB.

Full MySQL test query

Attachment: bug-report-test-query-full.sql (application/octet-stream, text), 2.95 KiB.

Full MySQL test dump with MyISAM as engine

Attachment: bug-report-sql-test-dump-myisam.sql (application/octet-stream, text), 28.21 KiB.