Oso local authorization: column count must match wildcard count
Local authorization queries must be SELECT statements with the result column count matching the wildcard count, and fact signatures cant overlap. Count columns before running.
Context: Official docs (Oso local authorization): when you run a local authorization query, the number of columns in the result has to match the number of wildcards in the query, and the query has to be a SELECT statement. Overlapping fact signatures are rejected too. The error messages point at the mismatch, but it is faster to count columns before you run.Maintainer review
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