We Built a Text-to-SQL Agent for SAP. Here’s Why We Had to Rethink Everything.

How governed SQL, a medallion semantic layer, and three query engines make enterprise data actually queryable — without hallucinated column names. Most Text-to-SQL demos look great until you try them on real enterprise data. You ask “what were our top 10 materials by revenue last quarter?” and the model confidently returns a query that joins ORDERS to PRODUCTS — tables that don’t exist in your SAP system. Or it invents a column called revenue when the real one is buried inside VBAK.NETWR, a fiel