Explain EXPLAIN PIPELINE (children 2)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 4)
    ExpressionList (children 4)
     Identifier pageId
     Function array (alias inactivity_timestamps) (children 1)
      ExpressionList (children 2)
       Identifier prev_active_ts
       Identifier timestamp
     Function minus (alias inactive_duration) (children 1)
      ExpressionList (children 2)
       Identifier timestamp
       Identifier prev_active_ts
     Identifier timestamp
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Subquery (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 1)
          SelectQuery (children 4)
           ExpressionList (children 3)
            Identifier pageId
            Identifier timestamp
            Function neighbor (alias prev_active_ts) (children 1)
             ExpressionList (children 2)
              Identifier timestamp
              Literal Int64_-1
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              TableIdentifier session_events
           Function and (children 1)
            ExpressionList (children 4)
             Function in (children 1)
              ExpressionList (children 2)
               Identifier type
               Subquery (children 1)
                SelectWithUnionQuery (children 1)
                 ExpressionList (children 1)
                  SelectQuery (children 3)
                   ExpressionList (children 1)
                    Identifier type
                   TablesInSelectQuery (children 1)
                    TablesInSelectQueryElement (children 1)
                     TableExpression (children 1)
                      TableIdentifier event_types
                   Function equals (children 1)
                    ExpressionList (children 2)
                     Identifier active
                     Literal UInt64_1
             Function equals (children 1)
              ExpressionList (children 2)
               Identifier sessionId
               Literal \'693de636-6d9b-47b7-b52a-33bd303b6255\'
             Function equals (children 1)
              ExpressionList (children 2)
               Identifier session_events.clientId
               Literal UInt64_141
             Function equals (children 1)
              ExpressionList (children 2)
               Identifier pageId
               Literal UInt64_1686053240314
           ExpressionList (children 1)
            OrderByElement (children 1)
             Identifier timestamp
    Function greaterOrEquals (children 1)
     ExpressionList (children 2)
      Function runningDifference (children 1)
       ExpressionList (children 1)
        Identifier timestamp
      Literal UInt64_500
    ExpressionList (children 1)
     OrderByElement (children 1)
      Identifier timestamp
 Identifier Null
