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