Databricks Community

AnthonyAnand · 03-23-2026

Focusing on the CoreUnderstanding Lakehouse FederationWhat is Query Federation?The Case for Query Federation: Why It MattersChoosing Your Path: Query Federation vs.LakeflowConnectEcosystem Compatibility and Supported ConnectivityHow itWorks:Connectin...

AnthonyAnand · 04-01-2026

Hi @Malthe, You have hit a very specific, known behavioral gap in how Apache Spark and Delta Lake interact. To answer your question directly: Yes, the Observable API is effectively incompatible with Delta Table merges when used directly. Why It ...

AnthonyAnand · 02-26-2026

@Kaz1 The reason could be that display(dataframe) behaves differently depending on whether it is showing a simple table or a visualization with server-side aggregation. When you click "Aggregate over more data," Databricks tries to re-run the underly...

AnthonyAnand · 02-16-2026

Hi @DoredlaCharan,Kindly add some more details like what are you trying to do and if possible some screenshot.Additionally Please try to below steps:1. REFRESH TABLE table_name and see if this helps in case of metadata sync issue.2. Delta Log - Check...

AnthonyAnand · 02-02-2026

Hi @soumitradutta ,Please have a solid understanding on the below items:1. What is Databricks & Lakehouse?Databricks vs traditional data warehouseLakehouse architecture (Bronze / Silver / Gold)Why Delta Lake matters2. Databricks Workspace BasicsWorks...

AnthonyAnand · 02-02-2026

@Cert-Team Thank you i have received support and helped me to reschedul the exam.

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[PARTNER BLOG] Unifying Enterprise Data with Lakehouse Federation

Re: Observable API and Delta Table merge

Re: dataframe.display() doesn't support data aggregation

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