enable supports_filter_during_aggregation for generic

Author: goldmedal

src/dialect/generic.rs

@@ -163,4 +163,8 @@ impl Dialect for GenericDialect {
     fn supports_comma_separated_set_assignments(&self) -> bool {
         true
     }
+
+    fn supports_filter_during_aggregation(&self) -> bool {
+        true
+    }
 }