Bug #104659 Select * reporting less rows_examined than only fields in an index.
Submitted: 18 Aug 2021 22:19 Modified: 14 Mar 16:45
Reporter: Jean-François Gagné Email Updates:
Status: Verified Impact on me:
None 
Category:MySQL Server: InnoDB storage engine Severity:S2 (Serious)
Version:8.0.26, 5.7.35 OS:Any
Assigned to: CPU Architecture:Any

File: Maximum allowed size is 3MB.
Description:
Privacy:

If the data you need to attach is more than 3MB, you should create a compressed archive of the data and a README file that describes the data with a filename that includes the bug number (recommended filename: mysql-bug-data-104659.zip) and upload one to sftp.oracle.com. A free Oracle Web (SSO) account (the one you use to login bugs.mysql.com) and a client that supports SFTP are required in order to access the SFTP server.

To upload the file to sftp.oracle.com:

  1. Open an SFTP client and connect to sftp.oracle.com. Specify port 2021 and remote directory /support/incoming/.
  2. Log in with your newly created Oracle Web account (email address) and password.
  3. Upload the archive to /support/incoming.
  4. Once you have uploaded the file, add a comment to this bug to notify us about it.
Example: sftp -oPort=2021 -oUser=email sftp.oracle.com:/support/incoming

Usage Notes: This directory is unlistable, which means that once you have uploaded your file, you will not be able to see it. A file cannot be uploaded more than once with the same filename. The filename must be changed before attempting to upload the file again. The filename should always start with mysql-bug- prefix. Files are retained on the SFTP server for 7 days and then permanently removed.

[18 Aug 2021 22:19] Jean-François Gagné
Reproduction for 5.7.35.

Attachment: 5.7.35.txt (text/plain), 10.32 KiB.

[28 Sep 2021 18:52] Jean-François Gagné
Screenshot of the discussion with Øystein (for when it will not be accessible because of free Slack limited history).

Attachment: Screen Shot 2021-09-28 at 2.40.01 PM.png (image/png, text), 414.07 KiB.