19

When looking at the properties of a particular login, it's possible to see a list of users mapped to that login: enter image description here

I profiled SQL Server Management Studio (SSMS) and I see that SSMS connects to every database one at a time and retrieves information from sys.database_permissions

Is it possible to write a single query that retrieves the user mapping information shown above or am I forced to use a cursor or sp_MSforeachdb or something like that?

15

Here's one way using dynamic SQL. There's not really any way to do this without iterating but this approach is much safer than undocumented, unsupported and buggy options like sp_MSforeachdb.

This will get a list of all online databases, the mapped user (if it exists) along with the default schema name and a comma-separated list of the roles they belong to.

DECLARE @name SYSNAME = N'your login name'; -- input param, presumably

DECLARE @sql NVARCHAR(MAX) = N'';

SELECT @sql += N'UNION ALL SELECT N''' + REPLACE(name,'''','''''') + ''',
  p.name, p.default_schema_name, STUFF((SELECT N'','' + r.name 
  FROM ' + QUOTENAME(name) + N'.sys.database_principals AS r
  INNER JOIN ' + QUOTENAME(name) + N'.sys.database_role_members AS rm
   ON r.principal_id = rm.role_principal_id
  WHERE rm.member_principal_id = p.principal_id
  FOR XML PATH, TYPE).value(N''.[1]'',''nvarchar(max)''),1,1,N'''')
 FROM sys.server_principals AS sp
 LEFT OUTER JOIN ' + QUOTENAME(name) + '.sys.database_principals AS p
 ON sp.sid = p.sid
 WHERE sp.name = @name '
FROM sys.databases WHERE [state] = 0;

SET @sql = STUFF(@sql, 1, 9, N'');

PRINT @sql;
EXEC master.sys.sp_executesql @sql, N'@name SYSNAME', @name;
  • 1
    interesting note, I had to add explicit collations to p.name and p.default_schema_name columns for the union all to work properly – Michael J Swart Oct 31 '14 at 16:45
  • @MichaelJSwart Ah yes, I've come across this before when databases have different collations (some metadata columns use the server collation but others inherit the database collation). I hope the only people that really ever burns are those that insist on using wacky characters in entity names that are only supported in some obscure collation... – Aaron Bertrand Oct 31 '14 at 18:19
7

This script is slightly modified from a script mentioned at will do what you are looking for. Replace 'ThursdayClass' with the login you need info for. https://www.simple-talk.com/sql/sql-tools/the-sqlcmd-workbench/

    SET NOCOUNT ON
    CREATE TABLE #temp
        (
          SERVER_name SYSNAME NULL ,
          Database_name SYSNAME NULL ,
          UserName SYSNAME ,
          GroupName SYSNAME ,
          LoginName SYSNAME NULL ,
          DefDBName SYSNAME NULL ,
          DefSchemaName SYSNAME NULL ,
          UserID INT ,
          [SID] VARBINARY(85)
        )

    DECLARE @command VARCHAR(MAX)
    --this will contain all the databases (and their sizes!)
    --on a server
    DECLARE @databases TABLE
        (
          Database_name VARCHAR(128) ,
          Database_size INT ,
          remarks VARCHAR(255)
        )
    INSERT  INTO @databases--stock the table with the list of databases
            EXEC sp_databases

    SELECT  @command = COALESCE(@command, '') + '
    USE ' + database_name + '
    insert into #temp (UserName,GroupName, LoginName,
                        DefDBName, DefSchemaName,UserID,[SID])
         Execute sp_helpuser
    UPDATE #TEMP SET database_name=DB_NAME(),
                     server_name=@@ServerName
    where database_name is null
    '
    FROM    @databases
    EXECUTE ( @command )

    SELECT  loginname ,
            UserName ,
            Database_name
    FROM    #temp
    WHERE   LoginName = 'ThursdayClass' 
  • Thanks Taiob, this works well, (I would enclose the database_name column in brackets ('[' and ']') – Michael J Swart Oct 31 '14 at 16:44
5

Try sp_dbpermissions. It will probably give you more info than you need but it will do what you want.

Once it's installed run this.

sp_dbpermissions @dbname = 'All', @LoginName = 'LoginName'

Fair warning at the moment it does a "like" match so if other logins are similar and match then you will see them also. For example MyLogin and MyLoginForThis will both match on MyLogin. If that's a problem I have a version that I haven't released yet where you can turn that off. Let me know and I can email it to you.

4

Here's a powershell solution:

import-module sqlps;

$s = new-object microsoft.sqlserver.management.smo.server '.'
foreach ($db in $s.Databases | where {$_.IsAccessible -eq $true}) {
   $u = $db.users | where {$_.Login -eq 'foobar'}
   if ($u -ne $null) { #login is mapped to a user in the db
       foreach ($role in $db.Roles) {
           if ($role.EnumMembers() -contains $u.Name) {
               $u | select parent, @{name="role";expression={$role.name}}, name
           }
       }
   }
}
4

Sadly you are going to have to iterate through all of the databases in order to get the information. You'll want to join sys.database_principals to sys.server_principals for each database matching on the SID.

Don't use sp_msforeachdb as it is known to miss databases at times.

  • The link is dead and the closest replacement I could find sirsql.net/2011/05/19/… does not have a script download. Can you make an edit to save that paragraph? – Paul White Feb 28 at 5:35
1

I was searching for a similar answer and found this: https://www.pythian.com/blog/httpconsultingblogs-emc-comjamiethomsonarchive20070209sql-server-2005_3a00_-view-all-permissions-_2800_2_2900_-aspx/ . And yes, it uses the dreaded sp_MSforeachDB, but I think that guy gets a bad rap sometimes... ;-)

I'll post the SQL here for easy copy-pasta (I am NOT taking credit for this, just making it easily accessible!):

DECLARE @DB_Users TABLE (DBName sysname, UserName sysname, LoginType sysname
, AssociatedRole varchar(max), create_date datetime, modify_date datetime)

INSERT @DB_Users
EXEC sp_MSforeachdb
'use [?]
SELECT ''?'' AS DB_Name,
case prin.name when ''dbo'' then prin.name + '' (''
    + (select SUSER_SNAME(owner_sid) from master.sys.databases where name =''?'') + '')''
    else prin.name end AS UserName,
    prin.type_desc AS LoginType,
    isnull(USER_NAME(mem.role_principal_id),'''') AS AssociatedRole, 
    create_date, modify_date
FROM sys.database_principals prin
LEFT OUTER JOIN sys.database_role_members mem
    ON prin.principal_id=mem.member_principal_id
WHERE prin.sid IS NOT NULL and prin.sid NOT IN (0x00)
and prin.is_fixed_role <> 1 AND prin.name NOT LIKE ''##%'''

SELECT dbname, username, logintype, create_date, modify_date,
    STUFF((SELECT ',' + CONVERT(VARCHAR(500), associatedrole)
        FROM @DB_Users user2
        WHERE user1.DBName=user2.DBName AND user1.UserName=user2.UserName
        FOR XML PATH('')
    ),1,1,'') AS Permissions_user
FROM @DB_Users user1
WHERE user1.UserName = N'<put your login-name here!>'
GROUP BY dbname, username, logintype, create_date, modify_date
ORDER BY DBName, username
-1

Below Query shall return the mappings for the requested DbName

SELECT 'DbName', dbPri.name, dbPri1.name
FROM [DbName].sys.database_principals dbPri 
JOIN [DbName].sys.database_role_members dbRoleMem ON dbRoleMem.member_principal_id = 
dbPri.principal_id
JOIN [DbName].sys.database_principals dbPri1  ON dbPri1.principal_id = 
dbRoleMem.role_principal_id
WHERE dbPri.name != 'dbo'

Improved Query is below

declare @sql varchar(Max)

 set @sql = 'use ? SELECT ''?'', dbPri.name, dbPri1.name
 FROM sys.database_principals dbPri 
 JOIN sys.database_role_members dbRoleMem ON 
 dbRoleMem.member_principal_id = 
 dbPri.principal_id
 JOIN sys.database_principals dbPri1  ON dbPri1.principal_id = 
 dbRoleMem.role_principal_id
 WHERE dbPri.name != ''dbo'''

 EXEC sp_MSforeachdb @sql
  • Thank you, the goal of this script was to find a mapping for all databases. Your script gives information for just one specific database, not all of them. – Michael J Swart Dec 17 '18 at 14:39
  • Thank you for the feedback, I thought It can be repeated. Now Updated with improved query – dilipkumar katre Dec 19 '18 at 7:32
  • See @Aaron-Bertrand's answer and comment on his thoughts about sp_MSforeachdb. – Michael J Swart Dec 19 '18 at 16:52
-3

What about EXEC master..sp_msloginmappings?

  • Did you check sp_msloginmappings is undocumented and unsupported before posting ? – Kin Shah Jul 5 '16 at 15:16

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