SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList (children 1)
      Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_array_ops
   Function in (children 1)
    ExpressionList (children 2)
     Identifier arr
     Function tuple (children 1)
      ExpressionList (children 2)
       Function CAST (children 1)
        ExpressionList (children 2)
         Literal Array_[UInt64_10, Int64_-20]
         Literal \'Array(Nullable(Int64))\'
       Function CAST (children 1)
        ExpressionList (children 2)
         Literal Array_[NULL, UInt64_10, Int64_-20]
         Literal \'Array(Nullable(Int64))\'