SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 4)
    Function materialize (alias x) (children 1)
     ExpressionList (children 1)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'[]\'
        Literal \'Array(Float32)\'
    Function CAST (alias y) (children 1)
     ExpressionList (children 2)
      Literal \'[]\'
      Literal \'Array(Float32)\'
    Function dotProduct (alias res) (children 1)
     ExpressionList (children 2)
      Identifier x
      Identifier y
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier res
