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 equals (children 1)
    ExpressionList (children 2)
     Identifier arr
     Function CAST (children 1)
      ExpressionList (children 2)
       Literal Array_[UInt64_10, Int64_-20]
       Literal \'Array(Nullable(Int64))\'