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alamb · alamb · commit 2ca7a319228c · 2022-10-27T12:30:13.000-04:00
diff --git a/parquet-test-utils/src/lib.rs b/parquet-test-utils/src/lib.rs
@@ -122,7 +122,13 @@ impl TestParquetFile {
         })
     }
 
-    /// return a `ParquetExec` with the specified options to scan the
+    /// return a `ParquetExec` and `FilterExec` with the specified options to scan this parquet file.
+    ///
+    /// This creates the pattern that DataFusion will:
+    /// ```
+    /// (FilterExec)
+    ///   (ParquetExec)
+    /// ```
     pub async fn create_scan(
         &self,
         filter: Expr,
