MySQL Bugs: #82470: Expression is always true

Bug #82470	Expression is always true
Submitted:	5 Aug 2016 9:10	Modified:	5 Aug 2016 13:28
Reporter:	Павел Гусев	Email Updates:
Status:	Duplicate	Impact on me:	None
Category:	MySQL Server	Severity:	S3 (Non-critical)
Version:	5.7	OS:	Any
Assigned to:		CPU Architecture:	Any
Tags:	bug, code defect, expression issues

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Description:
We've checked your source code with AppChecker (https://npo-echelon.ru/en/solutions/appchecker.php) static analyzer and found bug:

In file:
https://github.com/mysql/mysql-server/blob/e0e0ae2ea27c9bb76577664845507ef224d362e4/sql-co...

if (str[0] != 'a' || str[0] != 'A')

This expression is always true. 
I guess it should be && instead.

How to repeat:
The bug is in the source code

See https://bugs.mysql.com/bug.php?id=76913

Hi!

This bug is a duplicate of the existing bug #76913:

http://bugs.mysql.com/bug.php?id=76913

But, thanks for the report, anyway ...