SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 6)
   ExpressionList (children 1)
    Identifier x
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 1)
           Function demangle (alias x) (children 1)
            ExpressionList (children 1)
             Identifier symbol
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.symbols
          Function like (children 1)
           ExpressionList (children 2)
            Identifier symbol
            Literal \'%StorageSystemSymbols%\'
   Function like (children 1)
    ExpressionList (children 2)
     Identifier x
     Literal \'%DB::StorageSystemSymbols::StorageSystemSymbols%\'
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier x
   Literal UInt64_1
   Set