text: DROP TABLE IF EXISTS t;
  DROP TABLE IF EXISTS v;
  
  CREATE TABLE t (c String) ENGINE = Memory;
  
  CREATE MATERIALIZED VIEW v to v AS SELECT c FROM t; -- { serverError 36 }
  CREATE MATERIALIZED VIEW v to t AS SELECT * FROM v; -- { serverError 60 }
  
  DROP TABLE IF EXISTS t1;
  DROP TABLE IF EXISTS t2;
  DROP TABLE IF EXISTS v1;
  DROP TABLE IF EXISTS v2;
  
  CREATE TABLE t1 (c String) ENGINE = Memory;
  CREATE TABLE t2 (c String) ENGINE = Memory;
  
  CREATE MATERIALIZED VIEW v1 to t1 AS SELECT * FROM t2;
  CREATE MATERIALIZED VIEW v2 to t2 AS SELECT * FROM t1;
  
  INSERT INTO t1 VALUES ('Hello'); -- { serverError 306 }
  INSERT INTO t2 VALUES ('World'); -- { serverError 306 }
  
  DROP TABLE IF EXISTS t;
  DROP TABLE IF EXISTS v;
  DROP TABLE IF EXISTS t1;
  DROP TABLE IF EXISTS t2;
  DROP TABLE IF EXISTS v1;
  DROP TABLE IF EXISTS v2;
  