SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 4)
    Function CAST (alias x) (children 1)
     ExpressionList (children 2)
      Literal \'[1, 2, 3]\'
      Literal \'Array(UInt64)\'
    Function CAST (alias y) (children 1)
     ExpressionList (children 2)
      Literal \'[4, 5, 6]\'
      Literal \'Array(UInt64)\'
    Function dotProduct (alias res) (children 1)
     ExpressionList (children 2)
      Identifier x
      Identifier y
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier res
