SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    WithElement (children 1)
     Subquery (children 1)
      SelectWithUnionQuery (children 1)
       ExpressionList (children 2)
        SelectQuery (children 2)
         ExpressionList (children 4)
          Identifier id
          Identifier parent_id
          Function array (alias path) (children 1)
           ExpressionList (children 1)
            Identifier parent_id
          Function toUInt64 (alias depth) (children 1)
           ExpressionList (children 1)
            Literal UInt64_0
         TablesInSelectQuery (children 1)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            Function remote (children 1)
             ExpressionList (children 3)
              Literal \'127.0.0.{1,2}\'
              Function currentDatabase (children 1)
               ExpressionList
              Identifier test_table
        SelectQuery (children 3)
         ExpressionList (children 4)
          Identifier t.id
          Identifier t.parent_id
          Function arrayConcat (alias path) (children 1)
           ExpressionList (children 2)
            Identifier path
            Function array (children 1)
             ExpressionList (children 1)
              Identifier t.id
          Function plus (children 1)
           ExpressionList (children 2)
            Identifier depth
            Literal UInt64_1
         TablesInSelectQuery (children 2)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            Function remote (alias t) (children 1)
             ExpressionList (children 3)
              Literal \'127.0.0.{1,2}\'
              Function currentDatabase (children 1)
               ExpressionList
              Identifier test_table
          TablesInSelectQueryElement (children 2)
           TableExpression (children 1)
            TableIdentifier search_tree (alias st)
           TableJoin
         Function equals (children 1)
          ExpressionList (children 2)
           Identifier t.parent_id
           Identifier st.id
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier search_tree
   ExpressionList (children 3)
    OrderByElement (children 1)
     Identifier depth
    OrderByElement (children 1)
     Identifier id
    OrderByElement (children 1)
     Identifier parent_id
