Bug #99720 concat('') as var results in NULL and not in empty string (also bug report 99485
Submitted: 28 May 2020 9:03 Modified: 29 May 2020 6:57
Reporter: Ralf Spettnagel Email Updates:
Status: Duplicate Impact on me:
None 
Category:MySQL Server: Data Types Severity:S2 (Serious)
Version:5.6.48 OS:Linux
Assigned to: CPU Architecture:Any

[28 May 2020 9:03] Ralf Spettnagel 
Description:
see bug report 99485 but only for lower mysql version 5.6.48

How to repeat:
see 99485
[28 May 2020 14:50] MySQL Verification Team 
Thanks for the report
[29 May 2020 6:57] Norvald Ryeng 
This is a duplicate of bug#99722.