CREATE USER

Purpose

Use this statement to add users to the database. Exasol uses password, Kerberos SSO, or LDAP for authentication of the database users.

Prerequisite

You must have the system privilege CREATE USER.

Syntax

Usage Notes

• For the user to be able to log in subsequently, the system privilege CREATE SESSION must be granted.
• For the user name, the same rules as for SQL identifiers apply. However, even with identifiers in quotation marks, no attention is paid to case sensitivity. This means that the usernames "Test", "TEST", and "test" are synonymous. For more information, refer to the SQL Identifier section. Furthermore, different from other SQL identifiers, the dot symbol is allowed in usernames.
• For authentication, you can use passwords, Kerberos, or LDAP.
• A user created will not be automatically associated with a schema.
• A user can be altered by the ALTER USER command and renamed by using the RENAME command.
• For information about the database users, refer to the system tables EXA_DBA_USERS, EXA_ALL_USERS, and EXA_USER_USERS.
• For details about password security (complexity, expiry, locking accounts, refer to the Database Users and Roles and Privileges sections.

Examples

CREATE USER user_1 IDENTIFIED BY "h12_xhz";

CREATE USER user_2 IDENTIFIED AT LDAP
AS 'cn=user_2,dc=authorization,dc=exasol,dc=com';

GRANT CREATE SESSION TO user_1; 

Authentication using password

If you want to authenticate the database user with a password, create a user authenticated by a password. The database checks the user's password when they log in. The password has to be specified as identifier. If you use delimited (quoted) identifiers, then the password is case sensitive. For more information, refer to the SQL Identifier section.

In case of a regular identifier (unquoted) the password will be set to uppercase letters and has to be adjusted for the login.

Make sure that your LDAP server is already set up for authenticating the database users.

Do the following to configure the LDAP authentication of database users:

1. Log in to EXAoperation.
2. Shut down the database.
3. Edit the database and add the LDAP Server URLs starting with either ldap:// or ldaps://.
   For more information about how to edit a database, see Edit a Database.
4. Click Apply to save the changes.
5. Start the database.
6. Log in to your database using an SQL client.
7. Run the following statement to create a user with LDAP authentication.

   CREATE USER j.doe IDENTIFIED AT LDAP
   AS 'cn=j.doe,dc=authorization,dc=exasol,dc=com';

   You can find the required information for the above statement from the following methods depending on your operating system:

   • Windows OS: You can use one of the following commands to find the information from your LDAP server:
     a) Get-ADUser: Use the command through Powershell. To use this method, you need Remote Server Administration Tools installed and the feature Active Directory-Module for Windows PowerShell at your system. Example:

     C:\Users\john\powershell.exe get-aduser john

     
     

     b) dsquery: Use the command through cmd with admin privilege. To use this method, you need Remote Server Administration Tools installed on your system. Example:
     

     C:\Users\john\dsquery user john

   • Linux OS: You can use the LDAPSEARCH command to find the information from your LDAP server. Examples:

     ldapsearch -LLL "sn=Doe"

     ldapsearch -LLL "givenName=John"

     For more information, see Linux man page for LDAPSEARCH.

Further Information on LDAP in Exasol

If you want to know more about LDAP authentication in Exasol, see the following Exasol KB articles:

• LDAP Server Configuration
• Manual LDAP connection test
• Synchronization of LDAP/Active Directory Groups and Members