| Bug #41994 | Optimizer do full table scan when use distinct with group by in subquery | ||
|---|---|---|---|
| Submitted: | 9 Jan 2009 11:15 | Modified: | 9 Mar 2015 18:58 |
| Reporter: | Ben Li | Email Updates: | |
| Status: | Closed | Impact on me: | |
| Category: | MySQL Server: Optimizer | Severity: | S2 (Serious) |
| Version: | 5.1.30, 5.1.31, 6.0.8 | OS: | Any (test on linux/windows) |
| Assigned to: | Evgeny Potemkin | CPU Architecture: | Any |
| Tags: | distinct subquery groupby | ||
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
[9 Jan 2009 11:16]
Ben Li
