mdroogh commented on code in PR #13727:
URL: https://github.com/apache/datafusion/pull/13727#discussion_r1880137800


##########
datafusion/core/src/datasource/avro_to_arrow/schema.rs:
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@@ -144,14 +148,17 @@ fn schema_to_field_with_props(
         AvroSchema::Decimal(DecimalSchema {
             precision, scale, ..
         }) => DataType::Decimal128(*precision as u8, *scale as i8),
+        AvroSchema::BigDecimal => DataType::LargeBinary,

Review Comment:
   I tend to agree, it's not very clear what would be the best mapping.
   
   If it has the preference, we can also set it to "todo!()" that was done for 
some other types.
   



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