SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function nested (children 1)
     ExpressionList (children 4)
      Literal Array_[Array_[Array_[\'a\', \'b\', \'c\']]]
      Literal Array_[Array_[Array_[UInt64_1, UInt64_2], Array_[UInt64_3]], Array_[Array_[UInt64_4], Array_[UInt64_5, UInt64_6]]] (alias x)
      Literal Array_[Array_[Array_[UInt64_7, UInt64_8], Array_[UInt64_9]], Array_[Array_[UInt64_10], Array_[UInt64_11, UInt64_12]]] (alias y)
      Literal Array_[Array_[Array_[UInt64_13, UInt64_14], Array_[UInt64_15]], Array_[Array_[UInt64_16], Array_[UInt64_17, UInt64_18]]] (alias z)
 Identifier Pretty
