Dandandan commented on a change in pull request #1392:
URL: https://github.com/apache/arrow-datafusion/pull/1392#discussion_r761880357
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File path: datafusion/src/datasource/mod.rs
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@@ -198,3 +200,27 @@ fn get_col_stats(
})
.collect()
}
+
+fn flatten_schema(schema: &Schema) -> Vec<&Field> {
Review comment:
In the current uses, it seems we only need the total number of fields
(i.e. return a `usize`) instead of the field information.
It seems to me that would be a bit more simple / faster than first
collecting all the fields if we don't need the results of that.
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