Environment Variables

Hi everyone...

I'm trying to create a database with the parent directory being a environment variable,

something like this:

Code Snippet

CREATE DATABASE mydatabase
ON
PRIMARY(NAME = myDataBase,
FILENAME = '%PARENTDIRECTORY%\mydatabase.mdf',

the problem is I don't know to get an environment variable in transact SQL...

I know that in C# we can get it with %PARENTDIRECTORY%...

Thanx in advance

The following batch may help you...

Code Snippet

Create Table #Result

(

Data varchar(8000)

);

Insert Into #Result

Exec master..xp_cmdshell 'echo %TEMP%';

Declare @.ParentDirectory as nvarchar(256);

Select Top 1 @.ParentDirectory = Data From #result;

Select @.ParentDirectory = @.ParentDirectory + '\mydatabase.mdf'

Exec ('CREATE DATABASE mydatabase

ON

PRIMARY(NAME = myDataBase,

FILENAME = ''' + @.ParentDirectory + ''')')

Drop table #result

|||Thanx Manivannan the code above does the job, but doesn't the xp_cmdshell work only for XP users?

|||

sqlclr's udf can imprement below,

This assembly's permission need to 'EXTERNAL_ACCESS'.

Usage:

Code Snippet

select dbo.GetEnvironmentVariable('temp');

C# Source file:

Code Snippet

using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;

public partial class UserDefinedFunctions
{
[Microsoft.SqlServer.Server.SqlFunction(DataAccess=DataAccessKind.None)]
public static SqlString GetEnvironmentVariable(string variable)
{
string value = Environment.GetEnvironmentVariable(variable);
return new SqlString(value);
}
};