text: # ticket 895 is a query optimization problem with the primary key
  
  --source include/have_tokudb.inc
  --echo # Establish connection conn1 (user = root)
  connect (conn1,localhost,root,,);
  SET DEFAULT_STORAGE_ENGINE = 'tokudb';
  
  --disable_warnings
  DROP TABLE IF EXISTS foo;
  --enable_warnings
  
  connection conn1;
  set session transaction isolation level read committed;
  create table foo ( a int, b int, primary key (a));
  insert into foo values (1,1),(2,2),(3,1),(4,3);
  select * from foo;
  begin;
  update foo set b=10 where b=1;
  select * from foo;
  
  connection default;
  set session transaction isolation level read committed;
  select * from foo;
  set session transaction isolation level read uncommitted;
  select * from foo;
  
  connection conn1;
  rollback;
  begin;
  insert into foo values (5,1),(6,2),(7,1),(8,3);
  select * from foo;
  
  connection default;
  set session transaction isolation level read committed;
  select * from foo;
  set session transaction isolation level read uncommitted;
  select * from foo;
  
  connection conn1;
  commit;
  begin;
  delete from foo where b=1;
  select * from foo;
  
  connection default;
  set session transaction isolation level read committed;
  select * from foo;
  set session transaction isolation level read uncommitted;
  select * from foo;
  
  
  connection conn1;
  commit;
  
  connection default;
  disconnect conn1;
  
  connection default;
  # Final cleanup.
  set session transaction isolation level serializable;
  DROP TABLE foo;