topic Re: Fabric SQL Database Mirroring Error With Large Columns in Data Warehouse

Fabric SQL Database Mirroring Error With Large Columns

blull — Thu, 15 Aug 2024 12:42:05 GMT

I've mirrored a database to Fabric that is a large varchar column, and as a result I'm not able to query the table at all. Is there something I can do to fix this?

Started running query at line 1

Failed to read parquet file because the column segment for column 'Description' is too large. Underlying data description: 'table 'dbo.dbo_LoanCommunication',

Re: Fabric SQL Database Mirroring Error With Large Columns

Anonymous — Fri, 16 Aug 2024 02:09:15 GMT

Hi blull,

Did this field define with VARCHAR(max) or other size that larger than VARCHAR(8000)? AFAIK, current the data warehouse support the VARCHAR(8000) type.

Troubleshoot Fabric mirrored databases - Microsoft Fabric | Microsoft Learn

Some of the data in my column appears to be truncated
The Fabric warehouse does not support VARCHAR(max) it only currently supports VARCHAR(8000).

You may need to split them to multiple fields or waiting for the next release for add support with VARCHAR(max).

What's new and planned for Synapse Data Warehouse in Microsoft Fabric - Microsoft Fabric | Microsoft Learn

Feature	Estimated release timeline
VARCHAR(MAX)/VARBINARY(MAX) types	Q3 2024

Regards,

Xiaoxin Sheng

Re: Fabric SQL Database Mirroring Error With Large Columns

Anonymous — Thu, 22 Aug 2024 07:29:44 GMT

Hi blull ,

Any update on this? Did the above suggestions help with your scenario? if that is the case, you can consider Kudo or Accept the helpful suggestions to help others who faced similar requirements.

If these also don't help, please share more detailed information and description to help us clarify your scenario to test.

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Regards,

Xiaoxin Sheng