forgejo/models/db/sequence.go
Giteabot ecae62837c
Refactor setting.Database.UseXXX to methods (#23354) (#23356)
Backport #23354

Replace #23350.

Refactor `setting.Database.UseMySQL` to
`setting.Database.Type.IsMySQL()`.

To avoid mismatching between `Type` and `UseXXX`.

This refactor can fix the bug mentioned in #23350, so it should be
backported.

Co-authored-by: Jason Song <i@wolfogre.com>
2023-03-07 20:11:44 +08:00

70 lines
2 KiB
Go

// Copyright 2018 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package db
import (
"context"
"fmt"
"regexp"
"code.gitea.io/gitea/modules/setting"
)
// CountBadSequences looks for broken sequences from recreate-table mistakes
func CountBadSequences(_ context.Context) (int64, error) {
if !setting.Database.Type.IsPostgreSQL() {
return 0, nil
}
sess := x.NewSession()
defer sess.Close()
var sequences []string
schema := x.Dialect().URI().Schema
sess.Engine().SetSchema("")
if err := sess.Table("information_schema.sequences").Cols("sequence_name").Where("sequence_name LIKE 'tmp_recreate__%_id_seq%' AND sequence_catalog = ?", setting.Database.Name).Find(&sequences); err != nil {
return 0, err
}
sess.Engine().SetSchema(schema)
return int64(len(sequences)), nil
}
// FixBadSequences fixes for broken sequences from recreate-table mistakes
func FixBadSequences(_ context.Context) error {
if !setting.Database.Type.IsPostgreSQL() {
return nil
}
sess := x.NewSession()
defer sess.Close()
if err := sess.Begin(); err != nil {
return err
}
var sequences []string
schema := sess.Engine().Dialect().URI().Schema
sess.Engine().SetSchema("")
if err := sess.Table("information_schema.sequences").Cols("sequence_name").Where("sequence_name LIKE 'tmp_recreate__%_id_seq%' AND sequence_catalog = ?", setting.Database.Name).Find(&sequences); err != nil {
return err
}
sess.Engine().SetSchema(schema)
sequenceRegexp := regexp.MustCompile(`tmp_recreate__(\w+)_id_seq.*`)
for _, sequence := range sequences {
tableName := sequenceRegexp.FindStringSubmatch(sequence)[1]
newSequenceName := tableName + "_id_seq"
if _, err := sess.Exec(fmt.Sprintf("ALTER SEQUENCE `%s` RENAME TO `%s`", sequence, newSequenceName)); err != nil {
return err
}
if _, err := sess.Exec(fmt.Sprintf("SELECT setval('%s', COALESCE((SELECT MAX(id)+1 FROM `%s`), 1), false)", newSequenceName, tableName)); err != nil {
return err
}
}
return sess.Commit()
}