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Author: Prologika - Teo Lachev

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Prologika Newsletter Summer 2026

If Microsoft Fabric was the Statue of Liberty, the inscription would be “Give me your data”. Fabric is obsessed with owning the data when it makes sense and when it doesn’t. As I wrote before, this pattern was probably borrowed from Palantir and to align Fabric with the push for “modern” medallion architectures. Or, to establish a permanent dependency on Fabric… In this newsletter, I make…

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Open Semantic Interchange (OSI)

An excited enterprise client came back from a conference where Snowflake delighted them with AI demos and semantic views built on Open Semantic Interchange (OSI) standard. Snowflake even went further to show how their Cortex Analyst tool returns deterministic AI answers. Naturally, given their existing investments in Snowflake data lake and ODS, the client questioned why we don’t build everything in Snowflake instead of bringing…

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Give Me Your Data!

If Microsoft Fabric was the Statue of Liberty, the inscription would be “Give me your data”. Fabric is obsessed with owning the data when it makes sense and when it doesn’t. As I wrote before, this pattern was probably borrowed from Palantir and to align Fabric with the push for “modern” medallion architectures. Or, to establish a permanent dependency on Fabric… Auto-replicating data to Fabric…

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Replicating BigQuery to Fabric Reloaded

In a previous post, I referred to an engagement where we used the Fabric Copy Job activity to replicate Google BigQuery tables to Fabric, so we can use Direct Lake semantic models. A few months later, the client reported that they pivoted from the Copy Job to notebooks using the Spark BigQuery connector for two main benefits: Much better copy performance – Although the Copy…

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Atlanta Microsoft BI Group Meeting on May 4th (Making Sense of Copilot in Power BI)

Atlanta BI fans, please join us in person for our next meeting on Monday, May 4th at 18:30 ET. Jackie Kiadii will show you how you use the Copilot capabilities in Power BI. CloudStaff will sponsor the meeting. For more details and sign up, visit our group page. Delivery: In-person Level: Beginner/Intermediate Food: Pizza and drinks will be provided Agenda: 18:15-18:30 Registration and networking 18:30-19:00 Organizer…

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Power BI Unmaterialized Columns

Coming back from a long vacation, I’ve almost missed this interesting Power BI enhancement: Power BI unmaterialized calculated columns. Normally, I avoid the traditional DAX calculated columns for a variety of reasons, such as confusion about where business logic is applied, limited support across storage modes (for example, Direct Lake doesn’t support them), longer refresh times, etc. This not to say that calculated columns can't…

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Prologika Newsletter Spring 2026

At Ignite in November, 2025, Microsoft introduced Fabric IQ. I noted to go beyond the marketing hype and check if Fabric IQ makes any sense. The next thing I know, around the holidays I’m talking to an enterprise strategy manager from an airline company and McKinsey consultant about ontologies. In this newsletter I share my thoughts of FabricIQ based on my initial evaluation. Let's start…

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Direct Lake Composite Models

I’ve mentioned previously in the “A Couple of Direct Lake Gotchas” post that unlike Power BI reports, Excel surprised me by not showing user-defined hierarchies in a Direct Lake model. Direct Lake comes with other gotchas, such as not supporting DAX calculated columns and SQL views. I normally don’t use calculated columns, but they can come in handy, such as for flatting a parent-child hierarchies…

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