lidavidm commented on code in PR #983:
URL: https://github.com/apache/arrow-adbc/pull/983#discussion_r1297554199
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python/adbc_driver_manager/adbc_driver_manager/dbapi.py:
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@@ -926,6 +926,19 @@ def fetch_df(self) -> "pandas.DataFrame":
)
return self._results.fetch_df()
+ def fetch_query_schema(self, operation: Union[bytes, str],
parameters=None) -> pyarrow.Schema:
+ """
+ Fetch the output schema for the given query.
+
+ Notes
+ ----
+ This is an extension and not part of the DBAPI standard.
+ """
+ self._prepare_execute(operation, parameters)
+ handle, _ = self._stmt.execute_query()
+ rbr = pyarrow.RecordBatchReader._import_from_c(handle.address)
Review Comment:
This will still execute the query. If that's what you want, then just
execute the query explicitly instead of this, which is just a method that lies
to the caller.
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