Bug #120476 Index Merge Union returns duplicate row for overlapping OR conditions, producing wrong result count
Submitted: 14 May 11:53
Reporter: Li Zeyan Email Updates:
Status: Open Impact on me:
None 
Category:MySQL Server: Optimizer Severity:S2 (Serious)
Version:9.6.0 OS:Linux
Assigned to: CPU Architecture:Any

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:

[14 May 11:54] Li Zeyan
The minimal reproduction sql for this bug

Attachment: min_mysql_index_merge_union_repro.sql (application/octet-stream, text), 16.39 KiB.