// Copyright 2018 The Gitea Authors. All rights reserved.// SPDX-License-Identifier: MIT package db import (	"context"	"fmt"	"regexp" 	"forgejo.org/modules/setting") // CountBadSequences looks for broken sequences from recreate-table mistakesfunc 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 mistakesfunc 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()}