fix: refine FTS error message if no index (#3027)

fix #3015 Signed-off-by: BubbleCal <[email protected]>
lancedb · Oct 21, 2024 · fccb2d3 · fccb2d3
1 parent f9024ce
commit fccb2d3
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/rust/lance/src/dataset/scanner.rs b/rust/lance/src/dataset/scanner.rs
@@ -1318,6 +1318,13 @@ impl Scanner {
             query.columns.clone()
         };
 
+        if columns.is_empty() {
+            return Err(Error::invalid_input(
+                "Cannot perform full text search unless an INVERTED index has been created on at least one column".to_string(),
+                location!(),
+            ));
+        }
+
         // Now the full text search supports only one column
         if columns.len() != 1 {
             return Err(Error::invalid_input(