Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

Get Fabric Certified for FREE during Fabric Data Days. Don't miss your chance! Request now

Reply
MarkTeviotdale
Frequent Visitor

TicksToDateTime Not Working

We are currently connected to Cosmos DB Databases with Table API using a SQL connector in PowerBI

 

Everything has been working just fine for a number of years now,  but overnight we ran into an issue with a TicksToDateTime conversion.

 

Here is a simplified example of query we are using

 

SELECT {
"PartitionKey": c["$pk"],
"RowKey": c["$id"],
"CreatedTStamp": TicksToDateTime(StringToNumber(c["CreatedTStamp"]["$v"]) - 621355968000070000),
"Animal": c["Animal"]["$v"]
}
AS Entities
FROM EventData c
WHERE c["$pk"] = "WeightRecord"

 

The "CreatedTStamp" Field no longer returns a value.

 

"CreatedTStamp": TicksToDateTime(StringToNumber(c["CreatedTStamp"]["$v"]) - 621355968000070000),

 

As mentioned this has been working for years,  We can strip the "CreatedTStamp" field request down to component parts and return the correct values,  however the last step in the request TicksToDateTime has ceased to work.  

 

The Table API stores the DateTime as Ticks from 1 AD at its most base level,  we are using this formula to covert it into a usable datetime at our end.

 

Can you please advise what has change overnight,  if we were informed of the change,  if there is a possibility the change is reverted and/or if you have any advise on how to proceed.

1 ACCEPTED SOLUTION

Thanks @Anonymous for your message. 

 

We have a ticket in with Azure and the issue appears to be on the Azure Cosmos side, the current workaround at the moment is to add a ltrim example below: 

 

add ltrim for leading zeros

SELECT TicksToDateTime(StringToNumber(ltrim("00638435451214931790", "0")) - 621355968000070000)

View solution in original post

2 REPLIES 2
Anonymous
Not applicable

Hi @MarkTeviotdale ,

Can you please share some more detail information about this issue and error messages? They should help us clarify your scenario and test to troubleshoot.

How to Get Your Question Answered Quickly  

In addition, have you check on the data source to confirm if this issue only appeared on power bi side?
If that is the case, I'd like to suggest you check on the recently updated if anything change applied to the api interface.

Regards,

Xiaoxin Sheng

Thanks @Anonymous for your message. 

 

We have a ticket in with Azure and the issue appears to be on the Azure Cosmos side, the current workaround at the moment is to add a ltrim example below: 

 

add ltrim for leading zeros

SELECT TicksToDateTime(StringToNumber(ltrim("00638435451214931790", "0")) - 621355968000070000)

Helpful resources

Announcements
November Power BI Update Carousel

Power BI Monthly Update - November 2025

Check out the November 2025 Power BI update to learn about new features.

Fabric Data Days Carousel

Fabric Data Days

Advance your Data & AI career with 50 days of live learning, contests, hands-on challenges, study groups & certifications and more!

FabCon Atlanta 2026 carousel

FabCon Atlanta 2026

Join us at FabCon Atlanta, March 16-20, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM.

Top Solution Authors
Top Kudoed Authors