crepererum commented on code in PR #7870:
URL: https://github.com/apache/arrow-datafusion/pull/7870#discussion_r1369928872
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datafusion/common/src/dfschema.rs:
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@@ -102,8 +217,12 @@ impl DFSchema {
));
}
}
+
+ let fields_index = build_index(&fields);
Review Comment:
this use case might indeed be a good call of interior mutability, i.e. use
an RWLock and init the lookup table on the first use
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