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- // 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()
- }
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