text: create table t (i int);
  
  create index idx on t(i) where i = rand();
  create index idx on t(i) where rand();
  create index idx on t(i) where i = now();
  create index idx on t(i) where now();
  
  create index idx on t(i);
  alter index idx on t(i) where i = rand() rebuild;
  alter index idx on t(i) where rand() rebuild;
  alter index idx on t(i) where i = now() rebuild;
  alter index idx on t(i) where now() rebuild;
  
  drop table t;
  