--let $count=1
connection master;

if (`SELECT '$diff_table' = ''`)
{
  let $diff_table= mysql.user;
}

--echo 
--echo 
--echo 
--echo TEST STATEMENT: '$statement'
--echo --------------------------------------------------------------------------

if (`SELECT '$diff_columns' = ''`)
{
  eval CREATE VIEW test.bug48321_v1 AS SELECT user FROM $diff_table
        WHERE user LIKE 'bug48321%';
}

if (`SELECT '$diff_columns' <> ''`)
{
  eval CREATE VIEW test.bug48321_v1 AS SELECT user, $diff_columns
       FROM $diff_table WHERE user LIKE 'bug48321%';
}

while (`SELECT $count < 6`)
{
  --echo
  --echo TEST STATEMENT: '$statement'
  --echo CASE $count:
  --echo -------

  let $user2= 'bug48321_2'@'localhost';
  let $user3= 'bug48321_3'@'localhost';

  let $user1= CURRENT_USER();
  if (`SELECT '$action'='RENAME'`)
  {
    let $user1= $user1 TO 'bug48321_4'@'localhost';
    let $user2= $user2 TO 'bug48321_5'@'localhost';
    let $user3= $user3 TO 'bug48321_6'@'localhost';
  }

  if (`SELECT '$action'='GRANT'`)
  {
    let $user1= $user1 IDENTIFIED BY 'user1';
    let $user3= $user3 IDENTIFIED BY '';
  }

  if (`SELECT $count=1`)
  {
   --echo # Only CURRENT_USER() in the user list of the test statement.
    let $users_list= $user1;
  }

  if (`SELECT $count=2`)
  {
    --echo # Two users are in the test statement, CURRENT_USER is the first one.
    let $users_list= $user1, $user2;
  }

  if (`SELECT $count=3`)
  {
    --echo # Two users are in the test statement, CURRENT_USER is the last one.
    let $users_list= $user2, $user1;
  }

  if (`SELECT $count=4`)
  {
    --echo # Three users are in the test statement, CURRENT_USER is the second one.
    let $users_list= $user2, $user1, $user3;
  }

  if (`SELECT $count=5`)
  {
    --echo # CURRENT_USER is not in the test statement.
    let $users_list= $user2, $user3;
  }

  --echo users_list= $users_list
  --echo
  --echo # Connect to master with user1, so user1 always is the current user,
  --echo # when test statement is runing.
  eval GRANT ALL PRIVILEGES ON *.* TO 'bug48321_1'@'localhost'
       WITH GRANT OPTION; 
  eval CREATE USER 'bug48321_2'@'localhost', 'bug48321_3'@'localhost'
       IDENTIFIED BY 'user3';

  if (`SELECT '$action'='REVOKE'`)
  {
    --echo
    --echo # Grant some privileges to users at first when testing 
    --echo # 'REVOKE ...' statement.
    eval GRANT ALL PRIVILEGES ON *.* TO 'bug48321_2'@'localhost',
         'bug48321_3'@'localhost' WITH GRANT OPTION; 
    eval GRANT ALTER ROUTINE, EXECUTE ON PROCEDURE p1 TO 'bug48321_1'@'localhost',
         'bug48321_2'@'localhost', 'bug48321_3'@'localhost';
  }

  connect (conn1, 127.0.0.1, 'bug48321_1'@'localhost',,);
  connection conn1;
  --echo
  let $temp= `SELECT "$statement"`;
  eval $temp;
  --echo

  disconnect conn1;

  connection master;
  sync_slave_with_master;

  connection master;
  let $diff_table_1= master:test.bug48321_v1;
  let $diff_table_2= slave:test.bug48321_v1;
  source include/diff_tables.inc;
  --echo

  --echo # Delete all bug48321% users
  connection master;
  DELETE FROM mysql.user WHERE user LIKE 'bug48321%';
  DELETE FROM mysql.procs_priv WHERE user LIKE 'bug48321%';
  FLUSH PRIVILEGES;

  inc $count;
}
DROP VIEW test.bug48321_v1;