Cast INTERVAL and UUID to VARCHAR #12080
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Fixes MotherDuck-Open-Source/duckdb-power-query-connector#7.
Power Query/Power BI currently does not support
INTERVAL
and loading data with this type results in an error:Similarly, implementing a cast to
TIME
also won't work because in Power Query, valid values forTIME
hours are 0-23.UUID
has a similar problem that it throws an "Unimplemented type for cast (UUID -> DOUBLE)` error.This PR casts
INTERVAL
andUUID
toVARCHAR
by default. TheINTERVAL
value can be parsed separately in Power Query, for instance by usingDuration.FromText
(see docs).