Explain EXPLAIN PIPELINE (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 4)
    ExpressionList (children 3)
     Identifier k1
     Identifier k3
     Function sum (alias v) (children 1)
      ExpressionList (children 1)
       Identifier value
    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 proj_agg_02343
    ExpressionList (children 2)
     Identifier k1
     Identifier k3
    Set