fix: add user_id index to user roles table

Author: tamassoltesz

CHANGELOG.md

@@ -10,7 +10,13 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 ## [8.1.1]
 
 - Adds more null and empty checks for bulk migration
+- Adds user_id index to the user roles table
 
+### Migration
+
+```sql
+CREATE INDEX IF NOT EXISTS user_roles_user_id_index ON user_roles (user_id);
+```
 ## [8.1.0]
 
 - Adds support for webauthn (passkeys)

src/main/java/io/supertokens/storage/postgresql/queries/GeneralQueries.java

@@ -534,6 +534,7 @@ public static void createTablesIfNotExists(Start start, Connection con) throws S
                     update(con, UserRolesQueries.getQueryToCreateUserRolesRoleIndex(start), NO_OP_SETTER);
                     update(con, UserRolesQueries.getQueryToCreateTenantIdIndexForUserRolesTable(start), NO_OP_SETTER);
                     update(con, UserRolesQueries.getQueryToCreateRoleIndexForUserRolesTable(start), NO_OP_SETTER);
+                    update(con, UserRolesQueries.getQueryToCreateUserIdIndexForUserRolesTable(start), NO_OP_SETTER);
                 }
 
                 if (!doesTableExists(start, con, Config.getConfig(start).getUserIdMappingTable())) {

src/main/java/io/supertokens/storage/postgresql/queries/UserRolesQueries.java

@@ -116,6 +116,11 @@ public static String getQueryToCreateUserRolesRoleIndex(Start start) {
                 + "(app_id, tenant_id, role);";
     }
 
+    public static String getQueryToCreateUserIdIndexForUserRolesTable(Start start) {
+        return "CREATE INDEX IF NOT EXISTS user_roles_user_id_index ON " + getConfig(start).getUserRolesTable() +
+                "(user_id);";
+    }
+
     public static boolean createNewRoleOrDoNothingIfExists_Transaction(Start start, Connection con,
                                                                        AppIdentifier appIdentifier, String role)
             throws SQLException, StorageQueryException {