fix #494: add delete impact confirmations

src/main/resources/mapper/PermissionMapper.xml

@@ -44,6 +44,24 @@
     WHERE role_id = #{roleId,jdbcType=NUMERIC}
   </delete>
 
+  <select id="countUserRolesByRoleId" resultType="int">
+    SELECT COUNT(*)
+    FROM cb_user_role
+    WHERE role_id = #{roleId,jdbcType=NUMERIC}
+  </select>
+
+  <select id="countGroupRolesByRoleId" resultType="int">
+    SELECT COUNT(*)
+    FROM cb_group_role
+    WHERE role_id = #{roleId,jdbcType=NUMERIC}
+  </select>
+
+  <select id="countPermissionsByRoleId" resultType="int">
+    SELECT COUNT(*)
+    FROM cb_permission
+    WHERE role_id = #{roleId,jdbcType=NUMERIC}
+  </select>
+
   <select id="findPermissionViews" resultType="com.cloudhandson.vpdbackoffice.domain.permission.PermissionView">
     SELECT p.perm_id AS permission_id,
            r.role_id,