topic Re: Trouble managing mapping: cannot edit Type in Pipelines

Trouble managing mapping: cannot edit Type

MG86 — Wed, 30 Aug 2023 11:37:04 GMT

I have set up a copy activity that has REST API as source and Lakehouse table as Destination. However when doing the Mapping many fields return Type null because it is empty in the first row. Besides it not being able to infer the column type from the example data, I cannot manually set the Type either. Resulting in that I cannot copy those columns at all. In Azure Data Factory I can do this, but it seems I can't in Fabric Data Factory?

The error is:

ErrorCode=UserErrorSchemaMappingCannotInferSinkColumnType,'Type=Microsoft.DataTransfer.Common.Shared.HybridDeliveryException,Message=Data type of column 'EndDate' can't be inferred from 1st row of data, please specify its data type in mappings of copy activity or structure of DataSet.,Source=Microsoft.DataTransfer.Common,'

'please specify its data type in mappings of copy activity' is what I cannot do in this case.

Re: Trouble managing mapping: cannot edit Type

GraceGu — Thu, 31 Aug 2023 06:51:05 GMT

Thanks for reporting this. It is not supported yet. We are actively working on it, will take 1-2 months to support this. Anonymous

Re: Trouble managing mapping: cannot edit Type

Phierru — Wed, 29 May 2024 17:04:26 GMT

Why is this marked as "solved"? A solution should enable the execution of the original intent, even if it involves a workaround. "Not supported yet" does not qualify as a solution. It is understandable that with a system of this size, not everything has been implemented yet. However, marking it as "solved" can be misleading and may result in a waste of time.

Re: Trouble managing mapping: cannot edit Type

rezasoltani — Tue, 04 Mar 2025 11:16:52 GMT

Hi Grace,

I have the same issue. Are you still working on it, or has it gone to the backlog?

Re: Trouble managing mapping: cannot edit Type

Luanee — Tue, 16 Dec 2025 10:33:53 GMT

Hello GraceGu

This problem is currently causing me a lot of trouble as well. I'm trying to set up a Copy Data activity that uses an HTTP connector to load XML data, map it, and store it in a Lakehouse.

However, the error mentioned above is blocking this process. This worked fine in Azure Synapse and Data Factory.
It's already December. Is there any progress on this issue?