SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayConcat (children 1)
     ExpressionList (children 3)
      Function emptyArrayUInt8 (children 1)
       ExpressionList
      Function emptyArrayUInt8 (children 1)
       ExpressionList
      Function emptyArrayUInt8 (children 1)
       ExpressionList
