Snowflake: support for object constants (#1223)

src/dialect/mod.rs

@@ -170,6 +170,11 @@ pub trait Dialect: Debug + Any {
     fn supports_named_fn_args_with_eq_operator(&self) -> bool {
         false
     }
+    /// Returns true if the dialect supports defining structs or objects using a
+    /// syntax like `{'x': 1, 'y': 2, 'z': 3}`.
+    fn supports_dictionary_syntax(&self) -> bool {
+        false
+    }
     /// Returns true if the dialect has a CONVERT function which accepts a type first
     /// and an expression second, e.g. `CONVERT(varchar, 1)`
     fn convert_type_before_value(&self) -> bool {