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forgejo/models/migrations
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JakobDev 14731a34ff
Add index to `issue_user.issue_id` (#27154) 
This fixes a performance bottleneck. It was discovered by Codeberg.
Every where query on that table (which has grown big over time) uses
this column, but there is no index on it.

See this part of the log which was posted on Matrix:
```
2023/09/10 00:52:01 ...rs/web/repo/issue.go:1446:ViewIssue() [W] [Slow SQL Query] UPDATE `issue_user` SET is_read=? WHERE uid=? AND issue_id=? [true x y] - 51.395434887s
2023/09/10 00:52:01 ...rs/web/repo/issue.go:1447:ViewIssue() [E] ReadBy: Error 1205 (HY000): Lock wait timeout exceeded; try restarting transaction
2023/09/10 00:52:01 ...eb/routing/logger.go:102:func1() [I] router: completed GET /Codeberg/Community/issues/1201 for [::ffff:xxx]:0, 500 Internal Server Error in 52384.2ms @ repo/issue.go:1256(repo.ViewIssue)
```
 		9 months ago
..
base Rename `Sync2` -> `Sync` (#26479) 11 months ago
fixtures Remove wrongly added column on migration test fixtures (#23456) 1 year ago
v1_6 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_7 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_8 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_9 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_10 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_11 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_12 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_13 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_14 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_15 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_16 Replace deprecated `elliptic.Marshal` (#26800) 10 months ago
v1_17 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_18 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_19 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_20 Rename `Sync2` -> `Sync` (#26479) 11 months ago
v1_21 Add index to `issue_user.issue_id` (#27154) 9 months ago
migrations.go Add index to `issue_user.issue_id` (#27154) 9 months ago