Add combined index for issue_user.uid and issue_id (#28080)

fixes #27877

---------

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
sebastian-sauer 2023-12-14 10:26:59 +01:00 committed by GitHub
parent e85db6c8c3
commit e08f1a9cbd
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6 changed files with 100 additions and 2 deletions

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@ -14,8 +14,8 @@ import (
// IssueUser represents an issue-user relation.
type IssueUser struct {
ID int64 `xorm:"pk autoincr"`
UID int64 `xorm:"INDEX"` // User ID.
IssueID int64 `xorm:"INDEX"`
UID int64 `xorm:"INDEX unique(uid_to_issue)"` // User ID.
IssueID int64 `xorm:"INDEX unique(uid_to_issue)"`
IsRead bool
IsMentioned bool
}

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@ -0,0 +1,20 @@
-
id: 1
uid: 1
issue_id: 1
is_read: true
is_mentioned: false
-
id: 2
uid: 2
issue_id: 1
is_read: true
is_mentioned: false
-
id: 3
uid: 2
issue_id: 1 # duplicated with id 2
is_read: false
is_mentioned: true

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@ -550,6 +550,8 @@ var migrations = []Migration{
NewMigration("Add auth_token table", v1_22.CreateAuthTokenTable),
// v282 -> v283
NewMigration("Add Index to pull_auto_merge.doer_id", v1_22.AddIndexToPullAutoMergeDoerID),
// v283 -> v284
NewMigration("Add combined Index to issue_user.uid and issue_id", v1_22.AddCombinedIndexToIssueUser),
}
// GetCurrentDBVersion returns the current db version

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@ -0,0 +1,14 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package v1_22 //nolint
import (
"testing"
"code.gitea.io/gitea/models/migrations/base"
)
func TestMain(m *testing.M) {
base.MainTest(m)
}

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@ -0,0 +1,34 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package v1_22 //nolint
import (
"xorm.io/xorm"
)
func AddCombinedIndexToIssueUser(x *xorm.Engine) error {
type OldIssueUser struct {
IssueID int64
UID int64
Cnt int64
}
var duplicatedIssueUsers []OldIssueUser
if err := x.SQL("select * from (select issue_id, uid, count(1) as cnt from issue_user group by issue_id, uid) a where a.cnt > 1").
Find(&duplicatedIssueUsers); err != nil {
return err
}
for _, issueUser := range duplicatedIssueUsers {
if _, err := x.Exec("delete from issue_user where id in (SELECT id FROM issue_user WHERE issue_id = ? and uid = ? limit ?)", issueUser.IssueID, issueUser.UID, issueUser.Cnt-1); err != nil {
return err
}
}
type IssueUser struct {
UID int64 `xorm:"INDEX unique(uid_to_issue)"` // User ID.
IssueID int64 `xorm:"INDEX unique(uid_to_issue)"`
}
return x.Sync(&IssueUser{})
}

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@ -0,0 +1,28 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package v1_22 //nolint
import (
"testing"
"code.gitea.io/gitea/models/migrations/base"
)
func Test_AddCombinedIndexToIssueUser(t *testing.T) {
type IssueUser struct {
UID int64 `xorm:"INDEX unique(uid_to_issue)"` // User ID.
IssueID int64 `xorm:"INDEX unique(uid_to_issue)"`
}
// Prepare and load the testing database
x, deferable := base.PrepareTestEnv(t, 0, new(IssueUser))
defer deferable()
if x == nil || t.Failed() {
return
}
if err := AddCombinedIndexToIssueUser(x); err != nil {
t.Fatal(err)
}
}