topic Lakehouse Table Schema setup after Eventstream in Eventstream

Lakehouse Table Schema setup after Eventstream

bw_chec — Wed, 30 Oct 2024 12:38:06 GMT

Hi,

When I add a new table as a destination in eventstream, I get an error saying 'table not found'.

So do I need to create a table before the eventstream is set up?

And does it then have to have the correct schema before events are pushed to the stream?

Best,

Re: Lakehouse Table Schema setup after Eventstream

Anonymous — Thu, 31 Oct 2024 01:42:23 GMT

Hi bw_chec ,

do I need to create a table before the eventstream is set up?

No. You can create it directly when configuring the destination:

does it then have to have the correct schema before events are pushed to the stream?

It would be best if this is the case, please refer to the reply in the following link:
Solved: Handling schema changes and multiple schemas in Ev... - Microsoft Fabric Community

Best Regards,
Dino Tao
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Re: Lakehouse Table Schema setup after Eventstream

nilendraFabric — Thu, 16 Jan 2025 11:19:20 GMT

Hi bw_chec

Please check this :

1. Do You Need to Create the Table Beforehand?
Yes, you need to either create the table beforehand or allow the Eventstream to create it dynamically. If you select an existing table as the destination, it must already exist in your Lakehouse. Alternatively, you can configure the Eventstream to create a new Delta table when setting up the destination.

2. Does the Table Need the Correct Schema?
Schema Enforcement: Microsoft Fabric enforces schema compatibility when writing data into a Lakehouse destination table. If you are using an existing table, its schema must match the incoming data from the Eventstream. Any discrepancies, such as missing or extra columns, may result in errors or data being written with NULL values for missing fields.

Dynamic Schema Creation: When creating a new Delta table via the Eventstream configuration, the schema is inferred from the first record of incoming data. All subsequent records are projected onto this schema.

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