When Fabric regressions force literal OneLake URLs, document the workaround
· 6 min read
Parameterized DataLake expressions can work for months and then fail across stages overnight. Teams panic-rewrite convention docs as if literal OneLake URLs were always the design goal. That erases history and guarantees the workaround becomes religion.
Reframe "literal URL required" failures as service regressions. Ship validators and literal patches as temporary controls. Keep a Test to Preprod to Prod promotion story under the workaround. File and track the Microsoft support trail next to the repo convention. Do not pretend the platform always wanted hard-coded URLs.
Figure 1. Direct Lake on OneLake is the intended pattern. Literal URL patches are controls when parameters regress. Source: Microsoft Learn: Direct Lake storage.