viirya commented on code in PR #245:
URL: https://github.com/apache/iceberg-rust/pull/245#discussion_r1545542266
##########
crates/iceberg/src/scan.rs:
##########
@@ -187,6 +190,46 @@ impl TableScan {
let mut arrow_reader_builder =
ArrowReaderBuilder::new(self.file_io.clone(), self.schema.clone());
+ let mut field_ids = vec![];
+ for column_name in &self.column_names {
+ let field_id =
self.schema.field_id_by_name(column_name).ok_or_else(|| {
+ Error::new(
+ ErrorKind::DataInvalid,
+ format!(
+ "Column {} not found in table. Schema: {}",
+ column_name, self.schema
+ ),
+ )
+ })?;
+
+ let field = self.schema
+ .as_struct()
+ .field_by_id(field_id)
+ .ok_or_else(|| {
+ Error::new(
+ ErrorKind::DataInvalid,
+ format!(
+ "Column {} is not a direct child of schema but a
nested field. Schema: {}",
+ column_name, self.schema
Review Comment:
Okay. I used `FeatureUnsupported`.
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