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smpa01's avatar
smpa01
Community Champion
2 years ago
Solved

DMV MDSCHEMA_CUBES

How can I have MDSCHEMA_CUBES in DMV to return the timestamps in EST. The results don't match to the refresh history at all.

 

Does any1 know why it returns a different timestamp altogether? I need it to return the exat same time stamp as refresh history of the dataset.

jeffrey_wang AlexisOlson bcdobbs 

 

Thank you in advance.

  • There is a way to convert the utc to client locale timestamp.

     

     $SYSTEM.MDSCHEMA_CUBES returns timestamp in utc as the pbi server is in utc. The Analysis server does not have any built-in server offset function either in DAX/MDX/DMV ( I would be very happy to be proved wrong). So therfore, there is no way to utilize any SSAS function to convert server timezone to a prefereed timezone LIKE MIGHTY SQL.

     

    The first step is to create a datamart, even if there is no data ingested in it. The purpose of this datamart is to be able to take advantage of the SQL server that comes with it as SQL server has built-in TIMEZONE functions. So in my case I would do it like this

     

    let
       col =  [dateTime]
       yr = Text.From(Date.Year(col)),
        month = Text.End("0"&Text.From(Date.Month(col)),2),
        day = Text.End("0"&Text.From(Date.Day(col)),2),
        hour = Text.End("0"&Text.From(Time.Hour(col)),2),
        minute = Text.End("0"&Text.From(Time.Minute(col)),2),
        second = Text.From(Time.Second(col)),    
        val = yr&"-"&month&"-"&day&" "&hour&":"&minute&":"&second 
       // 2024-05-31 17:07:41.373
       // could I have avoided generating val in PQ? yes, if DMV had support for CAST/CONVERT
      /* BUT The query engine for DMVs is the Data Mining parser. The DMV query syntax is based on the SELECT (DMX) statement. Although DMV query syntax is based on a SQL SELECT statement, it does not support the full syntax of a SELECT statement. Notably, JOIN, GROUP BY, LIKE, CAST, and CONVERT are not supported.*/
    /* hence, PQ is required to generate val */
        in Sql.Database("server.datamart.fabric.microsoft.com", "db", [Query="select CONVERT(DATETIME,convert(datetime,'"&Text.From(val)&"') AT TIME ZONE 'UTC' AT TIME ZONE 'Eastern Standard Time') as t"])[t]{0}

     and this checks out on the server too

     

13 Replies

  • hackcrr's avatar
    hackcrr
    Memorable Member

    Hi, smpa01 

    Handling Daylight Saving Time in Power Query, For a more accurate conversion that handles daylight saving time, you can use the DateTimeZone.SwitchZone function which can take into account daylight saving time if you specify the correct timezone identifier.

    = DateTimeZone.SwitchZone([LAST_DATA_UPDATE], -5, 0)

     

    Best Regards,

    hackcrr

    If this post helps, then please consider Accept it as the solution and kudos to this post to help the other members find it more quickly

  • Power BI Service runs on UTC.  Base all your reports on it too.

     

    I am pretty sure you are not even on EST, but on EDT. 

    • smpa01's avatar
      smpa01
      Community Champion

      lbendlin  gr8 thnx, do you know how can I convert this tinestamp to client ttimestamp.

      • lbendlin's avatar
        lbendlin
        Super User

        You don't.  Let the client's browser locale settings do it for you.

  • smpa01's avatar
    smpa01
    Community Champion

    lbendlin  this is the best I could come up with, let me know if you have anything better

     

     

     

    let
        Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMtQ31DcyMDJRMDSyMjAAIgVHX6XYWAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Column1 = _t]),
        #"Added Custom1" = Table.AddColumn(Source, "Custom", each [Column1]&" +00:00"),
        #"Changed Type2" = Table.TransformColumnTypes(#"Added Custom1",{{"Custom", type datetimezone}}),
        #"Added Custom" = Table.AddColumn(#"Changed Type2", "Cust", each DateTimeZone.ToLocal([Custom])),
        #"Changed Type1" = Table.TransformColumnTypes(#"Added Custom",{{"Custom", type datetimezone}})
    in
        #"Changed Type1"

     

     

    • lbendlin's avatar
      lbendlin
      Super User

      That will not help as "Local" for the Power BI service means "UTC". You need to supply the shift parameter.

       

      hackcrr 's approach is better but it will only work half of the year.

      • smpa01's avatar
        smpa01
        Community Champion

        This works as long as it is used in semantic model and not in dataflow. This correctly intetprets client locale, but fails in dataflow. Power bi should have provided a method without needing me to explicitly provide the 3rd parameter for DateTimeZone.SwitchZone