text: DROP TABLE IF EXISTS t1;
  DROP TABLE IF EXISTS t2;
  CREATE TABLE t1 (n Int32) ENGINE = Memory;
  CREATE TABLE t2 (a Int32, n Int32) ENGINE = Memory;
  
  SELECT count() FROM t1 WHERE if(1, 1, n = 0);
  SELECT count(n) FROM t2 WHERE if(1, 1, n = 0);
  SELECT count() FROM t2 WHERE if(1, 1, n = 0);
  
  DROP TABLE t1;
  DROP TABLE t2;
  