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gitea/models/db/convert.go
wxiaoguang 2df7563f31
Recommend/convert to use case-sensitive collation for MySQL/MSSQL (#28662)
Mainly for MySQL/MSSQL.

It is important for Gitea to use case-sensitive database charset
collation. If the database is using a case-insensitive collation, Gitea
will show startup error/warning messages, and show the errors/warnings
on the admin panel's Self-Check page.

Make `gitea doctor convert` work for MySQL to convert the collations of
database & tables & columns.

* Fix #28131

## ⚠️ BREAKING ⚠️

It is not quite breaking, but it's highly recommended to convert the
database&table&column to a consistent and case-sensitive collation.
2024-01-10 11:03:23 +00:00

88 lines
2.1 KiB
Go

// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package db
import (
"fmt"
"strconv"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"xorm.io/xorm"
"xorm.io/xorm/schemas"
)
// ConvertDatabaseTable converts database and tables from utf8 to utf8mb4 if it's mysql and set ROW_FORMAT=dynamic
func ConvertDatabaseTable() error {
if x.Dialect().URI().DBType != schemas.MYSQL {
return nil
}
r, err := CheckCollations(x)
if err != nil {
return err
}
_, err = x.Exec(fmt.Sprintf("ALTER DATABASE `%s` CHARACTER SET utf8mb4 COLLATE %s", setting.Database.Name, r.ExpectedCollation))
if err != nil {
return err
}
tables, err := x.DBMetas()
if err != nil {
return err
}
for _, table := range tables {
if _, err := x.Exec(fmt.Sprintf("ALTER TABLE `%s` ROW_FORMAT=dynamic", table.Name)); err != nil {
return err
}
if _, err := x.Exec(fmt.Sprintf("ALTER TABLE `%s` CONVERT TO CHARACTER SET utf8mb4 COLLATE %s", table.Name, r.ExpectedCollation)); err != nil {
return err
}
}
return nil
}
// ConvertVarcharToNVarchar converts database and tables from varchar to nvarchar if it's mssql
func ConvertVarcharToNVarchar() error {
if x.Dialect().URI().DBType != schemas.MSSQL {
return nil
}
sess := x.NewSession()
defer sess.Close()
res, err := sess.QuerySliceString(`SELECT 'ALTER TABLE ' + OBJECT_NAME(SC.object_id) + ' MODIFY SC.name NVARCHAR(' + CONVERT(VARCHAR(5),SC.max_length) + ')'
FROM SYS.columns SC
JOIN SYS.types ST
ON SC.system_type_id = ST.system_type_id
AND SC.user_type_id = ST.user_type_id
WHERE ST.name ='varchar'`)
if err != nil {
return err
}
for _, row := range res {
if len(row) == 1 {
if _, err = sess.Exec(row[0]); err != nil {
return err
}
}
}
return err
}
// Cell2Int64 converts a xorm.Cell type to int64,
// and handles possible irregular cases.
func Cell2Int64(val xorm.Cell) int64 {
switch (*val).(type) {
case []uint8:
log.Trace("Cell2Int64 ([]uint8): %v", *val)
v, _ := strconv.ParseInt(string((*val).([]uint8)), 10, 64)
return v
}
return (*val).(int64)
}