adriangb commented on code in PR #19335:
URL: https://github.com/apache/datafusion/pull/19335#discussion_r2621582323
##########
datafusion/sqllogictest/src/test_context.rs:
##########
@@ -398,6 +398,58 @@ pub async fn register_metadata_tables(ctx:
&SessionContext) {
.unwrap();
ctx.register_batch("table_with_metadata", batch).unwrap();
+
+ // Register the get_metadata UDF for testing metadata preservation
+ ctx.register_udf(ScalarUDF::from(GetMetadataUdf::new()));
+}
+
+/// UDF to extract metadata from a field for testing purposes
+/// Usage: get_metadata(expr, 'key') -> returns the metadata value or NULL
+#[derive(Debug, PartialEq, Eq, Hash)]
+struct GetMetadataUdf {
Review Comment:
Happy to do so if you think it's worth it - I went with the conservative
approach
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