fix(mv): keep native source definitions compact

rust/lancedb/src/materialized_view.rs

@@ -313,7 +313,7 @@ pub fn read_staging(metadata: &HashMap<String, String>) -> Result<Option<Staging
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct MaterializedViewDefinition {
     /// A table-bound native pair source. It is never evaluated per source row.
-    pub duplicate_pairs: Option<DuplicatePairsView>,
+    pub duplicate_pairs: Option<Box<DuplicatePairsView>>,
     /// Name of the source table, in the same database as the view.
     pub source_table: String,
     /// Namespace path holding the source table; empty is the root namespace.

rust/lancedb/src/materialized_view/duplicate_pairs.rs

@@ -30,7 +30,7 @@ use crate::table::datafusion::udtf::duplicate_pairs::{
 };
 use crate::{Error, Result};
 
-pub(crate) const FUNCTION_NAME: &str = "vector_duplicate_pairs";
+pub(super) const FUNCTION_NAME: &str = "vector_duplicate_pairs";
 
 /// A native table-function source, pinned for the lifetime of the view.
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]

rust/lancedb/src/materialized_view/query.rs

@@ -284,7 +284,7 @@ fn extract(query: &Query) -> Result<MaterializedViewDefinition> {
             && index_hints.is_empty() =>
         {
             let (namespace, table, config) = super::duplicate_pairs::source(args)?;
-            duplicate_pairs = Some(config);
+            duplicate_pairs = Some(Box::new(config));
             (namespace, table)
         }
         Some(TableFactor::Table { args: Some(_), .. }) => {