[GitHub] [arrow-datafusion] jgoday commented on issue #496: panic! 'index out of bounds: the len is 0 but the index is 0 with bad sql query

[GitBox <gi...@apache.org>]

jgoday commented on issue #496:
URL: https://github.com/apache/arrow-datafusion/issues/496#issuecomment-854118770


   Hi @alamb Can I try this ?
   Should be enough to check if the coerced args in the aggregation returns no result (in physical_plan/aggregates) ?
   ```rust
   let arg = coerce(args, input_schema, &signature(fun))?;
   if arg.len() == 0 {
       return Err(DataFusionError::Plan(format!(
           "Invalid aggregation '{}'",
           name,
       )));
   }
   ```


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