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Version: Next

Preview a partition filter mapping

POST 
/api/v1/dataset/:pk/partition_mapping/preview/

Evaluate a partition value transform at sample values and return the predicate that would be appended to queries. The predicate is built by the same code the query path uses, so the preview cannot drift from what a chart emits. Parse and denylist checks run before anything reaches the engine, so an unparseable transform costs no query.

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Preview result