MySQL Bugs: #115711: Contribution by Tencent: Virtual column cause empty result in subpartition

Bug #115711	Contribution by Tencent: Virtual column cause empty result in subpartition
Submitted:	29 Jul 2024 6:56	Modified:	29 Jul 2024 7:14
Reporter:	lu yangyang	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Server: Partitions	Severity:	S2 (Serious)
Version:	8.0, 8.0.30,8.0.39, 8.4.2, 9.0.1	OS:	Any
Assigned to:		CPU Architecture:	Any
Tags:	subpartition, virtual generated column

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

It may be a feasible solution to fix the bug.

Attachment: check_part_func_bound_with_read_set.patch (application/octet-stream, text), 2.47 KiB.

I think a feasible solution is to clean up GET_FIXED_FIELDS_FLAG after unpacking virtual_column

Attachment: clear_fixed_field_flag.patch (application/octet-stream, text), 577 bytes.