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https://issues.apache.org/jira/browse/CASSANDRA-19749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Stefan Miklosovic updated CASSANDRA-19749:
------------------------------------------
    Description: 
Let's have:

{code}
authenticator:
  class_name : org.apache.cassandra.auth.PasswordAuthenticator
authorizer: CassandraAuthorizer
role_manager: CassandraRoleManager
{code}

and do this:

{code}
cassandra@cqlsh> select * from system_auth.roles;

 role      | can_login | is_superuser | member_of | salted_hash
-----------+-----------+--------------+-----------+--------------------------------------------------------------
 cassandra |      True |         True |      null | 
$2a$10$sFCKeluid5MlW/Z0CU1ygO1U5qpLW4Rgivmu8rZNmNNQ8WeC2y92S

{code}

Then 

{code}
cassandra@cqlsh> ALTER USER IF EXISTS this_role_does_not_exist SUPERUSER ;
cassandra@cqlsh> select * from system_auth.roles where role = 
'this_does_not_exist';

 role                | can_login | is_superuser | member_of | salted_hash
---------------------+-----------+--------------+-----------+-------------
 this_does_not_exist |      null |         True |      null |        null

{code}

  was:
Let's have:

{code}
authenticator:
  class_name : org.apache.cassandra.auth.PasswordAuthenticator
authorizer: CassandraAuthorizer
role_manager: CassandraRoleManager
{code}

and do this:

{code}
cassandra@cqlsh> select * from system_auth.roles;

 role      | can_login | is_superuser | member_of | salted_hash
-----------+-----------+--------------+-----------+--------------------------------------------------------------
 cassandra |      True |         True |      null | 
$2a$10$sFCKeluid5MlW/Z0CU1ygO1U5qpLW4Rgivmu8rZNmNNQ8WeC2y92S

{code}

Then 

{code}
cassandra@cqlsh> select * from system_auth.roles where role = 
'this_does_not_exist';

 role                | can_login | is_superuser | member_of | salted_hash
---------------------+-----------+--------------+-----------+-------------
 this_does_not_exist |      null |         True |      null |        null

{code}


> ALTER USER IF EXISTS creates a user if it does not exist
> --------------------------------------------------------
>
>                 Key: CASSANDRA-19749
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-19749
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Stefan Miklosovic
>            Priority: Normal
>
> Let's have:
> {code}
> authenticator:
>   class_name : org.apache.cassandra.auth.PasswordAuthenticator
> authorizer: CassandraAuthorizer
> role_manager: CassandraRoleManager
> {code}
> and do this:
> {code}
> cassandra@cqlsh> select * from system_auth.roles;
>  role      | can_login | is_superuser | member_of | salted_hash
> -----------+-----------+--------------+-----------+--------------------------------------------------------------
>  cassandra |      True |         True |      null | 
> $2a$10$sFCKeluid5MlW/Z0CU1ygO1U5qpLW4Rgivmu8rZNmNNQ8WeC2y92S
> {code}
> Then 
> {code}
> cassandra@cqlsh> ALTER USER IF EXISTS this_role_does_not_exist SUPERUSER ;
> cassandra@cqlsh> select * from system_auth.roles where role = 
> 'this_does_not_exist';
>  role                | can_login | is_superuser | member_of | salted_hash
> ---------------------+-----------+--------------+-----------+-------------
>  this_does_not_exist |      null |         True |      null |        null
> {code}



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