AlterQuery  test_materialize (children 3)
 ExpressionList (children 1)
  AlterCommand DELETE (children 1)
   Function equals (children 1)
    ExpressionList (children 2)
     Function modulo (children 1)
      ExpressionList (children 2)
       Identifier key
       Literal UInt64_2
     Literal UInt64_0
 Identifier test_materialize
 Set
