Merge pull request #171 from muzarski/statement-reset-params

statement: reset parameters

Author: dkropachev

scylla-rust-wrapper/src/statement.rs

@@ -125,6 +125,12 @@ impl CassStatement {
 
         CassError::CASS_OK
     }
+
+    fn reset_bound_values(&mut self, count: usize) {
+        // Clear bound values and resize the vector - all values should be unset.
+        self.bound_values.clear();
+        self.bound_values.resize(count, Unset);
+    }
 }
 
 #[no_mangle]
@@ -368,6 +374,17 @@ pub unsafe extern "C" fn cass_statement_set_request_timeout(
     CassError::CASS_OK
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn cass_statement_reset_parameters(
+    statement_raw: *mut CassStatement,
+    count: size_t,
+) -> CassError {
+    let statement = ptr_to_ref_mut(statement_raw);
+    statement.reset_bound_values(count as usize);
+
+    CassError::CASS_OK
+}
+
 prepare_binders_macro!(@index_and_name CassStatement,
     |s: &mut CassStatement, idx, v| s.bind_cql_value(idx, v),
     |s: &mut CassStatement, name, v| s.bind_cql_value_by_name(name, v));