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Bypass MariaDB performance bug of the "IN" sub-query, fix incorrect IssueIndex (#26279) #26368

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Aug 7, 2023
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32 changes: 24 additions & 8 deletions models/activities/action.go
Original file line number Diff line number Diff line change
Expand Up @@ -685,18 +685,34 @@ func NotifyWatchersActions(acts []*Action) error {
}

// DeleteIssueActions delete all actions related with issueID
func DeleteIssueActions(ctx context.Context, repoID, issueID int64) error {
func DeleteIssueActions(ctx context.Context, repoID, issueID, issueIndex int64) error {
// delete actions assigned to this issue
subQuery := builder.Select("`id`").
From("`comment`").
Where(builder.Eq{"`issue_id`": issueID})
if _, err := db.GetEngine(ctx).In("comment_id", subQuery).Delete(&Action{}); err != nil {
return err
e := db.GetEngine(ctx)

// MariaDB has a performance bug: https://jira.mariadb.org/browse/MDEV-16289
// so here it uses "DELETE ... WHERE IN" with pre-queried IDs.
var lastCommentID int64
commentIDs := make([]int64, 0, db.DefaultMaxInSize)
for {
commentIDs = commentIDs[:0]
err := e.Select("`id`").Table(&issues_model.Comment{}).
Where(builder.Eq{"issue_id": issueID}).And("`id` > ?", lastCommentID).
OrderBy("`id`").Limit(db.DefaultMaxInSize).
Find(&commentIDs)
if err != nil {
return err
} else if len(commentIDs) == 0 {
break
} else if _, err = db.GetEngine(ctx).In("comment_id", commentIDs).Delete(&Action{}); err != nil {
return err
} else {
lastCommentID = commentIDs[len(commentIDs)-1]
}
}

_, err := db.GetEngine(ctx).Table("action").Where("repo_id = ?", repoID).
_, err := e.Where("repo_id = ?", repoID).
In("op_type", ActionCreateIssue, ActionCreatePullRequest).
Where("content LIKE ?", strconv.FormatInt(issueID, 10)+"|%").
Where("content LIKE ?", strconv.FormatInt(issueIndex, 10)+"|%"). // "IssueIndex|content..."
Delete(&Action{})
return err
}
Expand Down
34 changes: 34 additions & 0 deletions models/activities/action_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
package activities_test

import (
"fmt"
"path"
"testing"

Expand Down Expand Up @@ -284,3 +285,36 @@ func TestConsistencyUpdateAction(t *testing.T) {
assert.NoError(t, db.GetEngine(db.DefaultContext).Where("id = ?", id).Find(&actions))
unittest.CheckConsistencyFor(t, &activities_model.Action{})
}

func TestDeleteIssueActions(t *testing.T) {
assert.NoError(t, unittest.PrepareTestDatabase())

// load an issue
issue := unittest.AssertExistsAndLoadBean(t, &issue_model.Issue{ID: 4})
assert.NotEqualValues(t, issue.ID, issue.Index) // it needs to use different ID/Index to test the DeleteIssueActions to delete some actions by IssueIndex

// insert a comment
err := db.Insert(db.DefaultContext, &issue_model.Comment{Type: issue_model.CommentTypeComment, IssueID: issue.ID})
assert.NoError(t, err)
comment := unittest.AssertExistsAndLoadBean(t, &issue_model.Comment{Type: issue_model.CommentTypeComment, IssueID: issue.ID})

// truncate action table and insert some actions
err = db.TruncateBeans(db.DefaultContext, &activities_model.Action{})
assert.NoError(t, err)
err = db.Insert(db.DefaultContext, &activities_model.Action{
OpType: activities_model.ActionCommentIssue,
CommentID: comment.ID,
})
assert.NoError(t, err)
err = db.Insert(db.DefaultContext, &activities_model.Action{
OpType: activities_model.ActionCreateIssue,
RepoID: issue.RepoID,
Content: fmt.Sprintf("%d|content...", issue.Index),
})
assert.NoError(t, err)

// assert that the actions exist, then delete them
unittest.AssertCount(t, &activities_model.Action{}, 2)
assert.NoError(t, activities_model.DeleteIssueActions(db.DefaultContext, issue.RepoID, issue.ID, issue.Index))
unittest.AssertCount(t, &activities_model.Action{}, 0)
}
2 changes: 1 addition & 1 deletion services/issue/issue.go
Original file line number Diff line number Diff line change
Expand Up @@ -242,7 +242,7 @@ func deleteIssue(ctx context.Context, issue *issues_model.Issue) error {
issue.MilestoneID, err)
}

if err := activities_model.DeleteIssueActions(ctx, issue.RepoID, issue.ID); err != nil {
if err := activities_model.DeleteIssueActions(ctx, issue.RepoID, issue.ID, issue.Index); err != nil {
return err
}

Expand Down