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Helper II
Helper II

TMSL Alter Column Description

I am a noob in TMSL and I need your help.

I am trying to add a description to the column in Power BI Services with a command:


"alter ": {
"object": {
"database": "dataset_test",
"table": "005_SHIP_TO_LOCATIONS",
"column": {
"name": "CREATION_DATE",
"description":"This is the new description"



The error I get is:

Unrecognized command: alter . Check path '['alter ']', line 2, position 13.

Could you help me to make it work?


This is Power BI Premium and I TMSL works for table name modification, but I can't figure out how to change the column description.

Super User
Super User

The ALTER command only works with the objects listed in the documentation listed here 

(Database, DataSource, Table, Partition and Role)


If you want to alter the description on a column you would actually have to specify the entire columns collection and all the properties for all the columns.


For this reason I would not use TMSL to alter a column description. I would either use something like Tabular Editor or if you want to script this you could use PowerShell or C# with the TOM library (which is part of the AMO download here ) and a version of this is usually on your machine if you have the SQL client tools installed.



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