Post Sitecore 9 install SQL script

update.sql

:SETVAR DatabasePrefix sc9test_ 
:SETVAR UserName collectionuser 
:SETVAR Password Test12345 
:SETVAR ShardMapManagerDatabaseNameSuffix _Xdb.Collection.ShardMapManager 
:SETVAR Shard0DatabaseNameSuffix _Xdb.Collection.Shard0 
:SETVAR Shard1DatabaseNameSuffix _Xdb.Collection.Shard1 
GO 
 
IF(SUSER_ID('$(UserName)') IS NULL) 
BEGIN         
	CREATE LOGIN [$(UserName)] WITH PASSWORD = '$(Password)'; 
END; 
GO 
 
USE [$(DatabasePrefix)$(ShardMapManagerDatabaseNameSuffix)] 
 
IF NOT EXISTS (SELECT * FROM sys.database_principals WHERE name = N'$(UserName)') 
BEGIN     
CREATE USER [$(UserName)] FOR LOGIN [$(UserName)]          
GRANT SELECT ON SCHEMA :: __ShardManagement TO [$(UserName)]        
GRANT EXECUTE ON SCHEMA :: __ShardManagement TO [$(UserName)] 
END; 
GO 
 
USE [$(DatabasePrefix)$(Shard0DatabaseNameSuffix)]  
 
IF NOT EXISTS (SELECT * FROM sys.database_principals WHERE name = N'$(UserName)') 
BEGIN     
CREATE USER [$(UserName)] FOR LOGIN [$(UserName)]          
EXEC [xdb_collection].[GrantLeastPrivilege] @UserName = '$(UserName)' 
END; 
GO 
 
USE [$(DatabasePrefix)$(Shard1DatabaseNameSuffix)]  
 
IF NOT EXISTS (SELECT * FROM sys.database_principals WHERE name = N'$(UserName)') 
BEGIN     
CREATE USER [$(UserName)] FOR LOGIN [$(UserName)]          
EXEC [xdb_collection].[GrantLeastPrivilege] @UserName = '$(UserName)' 
END; 
 
GO