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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>
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@ -14,8 +14,8 @@ import (
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// IssueUser represents an issue-user relation.
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type IssueUser struct {
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ID int64 `xorm:"pk autoincr"`
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UID int64 `xorm:"INDEX"` // User ID.
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IssueID int64 `xorm:"INDEX"`
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UID int64 `xorm:"INDEX unique(uid_to_issue)"` // User ID.
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IssueID int64 `xorm:"INDEX unique(uid_to_issue)"`
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IsRead bool
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IsMentioned bool
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}
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@ -0,0 +1,20 @@
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-
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id: 1
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uid: 1
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issue_id: 1
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is_read: true
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is_mentioned: false
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-
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id: 2
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uid: 2
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issue_id: 1
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is_read: true
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is_mentioned: false
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-
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id: 3
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uid: 2
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issue_id: 1 # duplicated with id 2
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is_read: false
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is_mentioned: true
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@ -550,6 +550,8 @@ var migrations = []Migration{
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NewMigration("Add auth_token table", v1_22.CreateAuthTokenTable),
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// v282 -> v283
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NewMigration("Add Index to pull_auto_merge.doer_id", v1_22.AddIndexToPullAutoMergeDoerID),
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// v283 -> v284
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NewMigration("Add combined Index to issue_user.uid and issue_id", v1_22.AddCombinedIndexToIssueUser),
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}
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// GetCurrentDBVersion returns the current db version
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14
models/migrations/v1_22/main_test.go
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14
models/migrations/v1_22/main_test.go
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@ -0,0 +1,14 @@
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// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package v1_22 //nolint
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import (
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"testing"
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"code.gitea.io/gitea/models/migrations/base"
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)
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func TestMain(m *testing.M) {
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base.MainTest(m)
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}
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34
models/migrations/v1_22/v283.go
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34
models/migrations/v1_22/v283.go
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@ -0,0 +1,34 @@
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// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package v1_22 //nolint
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import (
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"xorm.io/xorm"
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)
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func AddCombinedIndexToIssueUser(x *xorm.Engine) error {
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type OldIssueUser struct {
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IssueID int64
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UID int64
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Cnt int64
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}
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var duplicatedIssueUsers []OldIssueUser
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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").
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Find(&duplicatedIssueUsers); err != nil {
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return err
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}
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for _, issueUser := range duplicatedIssueUsers {
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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 {
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return err
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}
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}
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type IssueUser struct {
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UID int64 `xorm:"INDEX unique(uid_to_issue)"` // User ID.
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IssueID int64 `xorm:"INDEX unique(uid_to_issue)"`
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}
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return x.Sync(&IssueUser{})
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}
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28
models/migrations/v1_22/v283_test.go
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28
models/migrations/v1_22/v283_test.go
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@ -0,0 +1,28 @@
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// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package v1_22 //nolint
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import (
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"testing"
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"code.gitea.io/gitea/models/migrations/base"
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)
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func Test_AddCombinedIndexToIssueUser(t *testing.T) {
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type IssueUser struct {
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UID int64 `xorm:"INDEX unique(uid_to_issue)"` // User ID.
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IssueID int64 `xorm:"INDEX unique(uid_to_issue)"`
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}
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// Prepare and load the testing database
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x, deferable := base.PrepareTestEnv(t, 0, new(IssueUser))
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defer deferable()
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if x == nil || t.Failed() {
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return
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}
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if err := AddCombinedIndexToIssueUser(x); err != nil {
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t.Fatal(err)
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}
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}
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