Explain EXPLAIN (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 5)
    ExpressionList (children 1)
     Identifier v
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function remote (children 1)
        ExpressionList (children 3)
         Literal \'127.{1,2}\'
         Function view (children 1)
          ExpressionList (children 1)
           SelectWithUnionQuery (children 1)
            ExpressionList (children 1)
             SelectQuery (children 2)
              ExpressionList (children 3)
               Literal UInt64_1 (alias k1)
               Literal UInt64_2 (alias k2)
               Literal UInt64_3 (alias v)
              TablesInSelectQuery (children 1)
               TablesInSelectQueryElement (children 1)
                TableExpression (children 1)
                 Function numbers (children 1)
                  ExpressionList (children 1)
                   Literal UInt64_2
         Function cityHash64 (children 1)
          ExpressionList (children 2)
           Identifier k1
           Identifier k2
    ExpressionList (children 1)
     OrderByElement (children 1)
      Identifier v
    Literal UInt64_1
    ExpressionList (children 2)
     Identifier k1
     Identifier k2
