Remove the config for default varchar since it's unnecessary

Author: lunny

custom/conf/app.example.ini

@@ -378,9 +378,6 @@ SSL_MODE = disable
 ; For MySQL only, either "utf8" or "utf8mb4", default is "utf8mb4".
 ; NOTICE: for "utf8mb4" you must use MySQL InnoDB > 5.6. Gitea is unable to check this.
 CHARSET = utf8mb4
-; For Mssql only, either "varchar" or "nvarchar", default is "nvarchar"
-; NOTICE: if you changed the config, you have to convert the original columns type manually
-DEFAULT_VARCHAR = nvarchar
 ; For "sqlite3" and "tidb", use an absolute path when you start gitea as service
 PATH = data/gitea.db
 ; For "sqlite3" only. Query timeout

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -245,7 +245,6 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
      - `verify-ca`: Enable TLS with verification of the database server certificate against its root certificate.
      - `verify-full`: Enable TLS and verify the database server name matches the given certificate in either the `Common Name` or `Subject Alternative Name` fields.
 - `CHARSET`: **utf8mb4**: For MySQL only, either "utf8" or "utf8mb4". NOTICE: for "utf8mb4" you must use MySQL InnoDB > 5.6. Gitea is unable to check this.
-- `DEFAULT_VARCHAR`: **nvarchar**: For Mssql only, either "varchar" or "nvarchar"; If you changed the config, you have to convert the original columns type manually.
 - `PATH`: **data/gitea.db**: For SQLite3 only, the database file path.
 - `LOG_SQL`: **true**: Log the executed SQL.
 - `DB_RETRIES`: **10**: How many ORM init / DB connect attempts allowed.

docs/content/doc/advanced/config-cheat-sheet.zh-cn.md

@@ -82,7 +82,6 @@ menu:
 - `PASSWD`: 数据库用户密码。
 - `SSL_MODE`: MySQL 或 PostgreSQL数据库是否启用SSL模式。
 - `CHARSET`: **utf8mb4**: 仅当数据库为 MySQL 时有效, 可以为 "utf8" 或 "utf8mb4"。注意：如果使用 "utf8mb4"，你的 MySQL InnoDB 版本必须在 5.6 以上。
-- `DEFAULT_VARCHAR`: **nvarchar**: 仅当数据库为 Mssql 时有效, 可以为 "varchar" 或 "nvarchar"。如果改变了此项配置，你需要手动修改数据库中所有已创建的字段为指定的类型。
 - `PATH`: Tidb 或者 SQLite3 数据文件存放路径。
 - `LOG_SQL`: **true**: 显示生成的SQL，默认为真。
 - `MAX_IDLE_CONNS` **0**: 最大空闲数据库连接

models/models.go

@@ -146,7 +146,7 @@ func getEngine() (*xorm.Engine, error) {
 	if setting.Database.Type == "mysql" {
 		engine.Dialect().SetParams(map[string]string{"rowFormat": "DYNAMIC"})
 	} else if setting.Database.Type == "mssql" {
-		engine.Dialect().SetParams(map[string]string{"DEFAULT_VARCHAR": setting.Database.DefaultVarchar})
+		engine.Dialect().SetParams(map[string]string{"DEFAULT_VARCHAR": "nvarchar"})
 	}
 	engine.SetSchema(setting.Database.Schema)
 	return engine, nil

modules/setting/database.go

@@ -35,7 +35,6 @@ var (
 		Path              string
 		LogSQL            bool
 		Charset           string
-		DefaultVarchar    string
 		Timeout           int // seconds
 		UseSQLite3        bool
 		UseMySQL          bool
@@ -48,8 +47,7 @@ var (
 		ConnMaxLifetime   time.Duration
 		IterateBufferSize int
 	}{
-		DefaultVarchar: "nvarchar",
-		Timeout:        500,
+		Timeout: 500,
 	}
 )
 
@@ -81,7 +79,6 @@ func InitDBConfig() {
 	Database.Schema = sec.Key("SCHEMA").String()
 	Database.SSLMode = sec.Key("SSL_MODE").MustString("disable")
 	Database.Charset = sec.Key("CHARSET").In("utf8", []string{"utf8", "utf8mb4"})
-	Database.DefaultVarchar = sec.Key("DEFAULT_VARCHAR").In("varchar", []string{"varchar", "nvarchar"})
 	Database.Path = sec.Key("PATH").MustString(filepath.Join(AppDataPath, "gitea.db"))
 	Database.Timeout = sec.Key("SQLITE_TIMEOUT").MustInt(500)
 	Database.MaxIdleConns = sec.Key("MAX_IDLE_CONNS").MustInt(2)