fix: add index for session_info on user_id, app_id

CHANGELOG.md

@@ -30,6 +30,7 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 ### Fixes
 
 - Fixes issue with user id mapping while refreshing session
+- Adds indexing for `session_info` table on `user_id, app_id` columns
 
 ### Migrations
 
@@ -54,6 +55,8 @@ CREATE INDEX IF NOT EXISTS bulk_import_users_status_updated_at_index ON bulk_imp
 CREATE INDEX IF NOT EXISTS bulk_import_users_pagination_index1 ON bulk_import_users (app_id, status, created_at DESC, id DESC);
 
 CREATE INDEX IF NOT EXISTS bulk_import_users_pagination_index2 ON bulk_import_users (app_id, created_at DESC, id DESC);
+
+CREATE INDEX IF NOT EXISTS session_info_user_id_app_id_index ON session_info (user_id, app_id);
 ```
 
 For MySQL run the following SQL script:
@@ -77,6 +80,8 @@ CREATE INDEX bulk_import_users_status_updated_at_index ON bulk_import_users (app
 CREATE INDEX bulk_import_users_pagination_index1 ON bulk_import_users (app_id, status, created_at DESC, id DESC);
 
 CREATE INDEX bulk_import_users_pagination_index2 ON bulk_import_users (app_id, created_at DESC, id DESC);
+
+CREATE INDEX session_info_user_id_app_id_index ON session_info (user_id, app_id);
 ```
 
 ## [9.3.1]

src/main/java/io/supertokens/inmemorydb/queries/GeneralQueries.java

@@ -258,6 +258,7 @@ public static void createTablesIfNotExists(Start start, Main main) throws SQLExc
 
             // index
             update(start, getQueryToCreateSessionExpiryIndex(start), NO_OP_SETTER);
+            update(start, getQueryToCreateSessionAppIdUserIdIndex(start), NO_OP_SETTER);
         }
 
         if (!doesTableExists(start, Config.getConfig(start).getTenantConfigsTable())) {

src/main/java/io/supertokens/inmemorydb/queries/SessionQueries.java

@@ -76,6 +76,11 @@ static String getQueryToCreateSessionExpiryIndex(Start start) {
                 + Config.getConfig(start).getSessionInfoTable() + "(expires_at);";
     }
 
+    static String getQueryToCreateSessionAppIdUserIdIndex(Start start) {
+        return "CREATE INDEX session_info_user_id_app_id_index ON "
+                + Config.getConfig(start).getSessionInfoTable() + "(user_id, app_id);";
+    }
+
     public static void createNewSession(Start start, TenantIdentifier tenantIdentifier, String sessionHandle,
                                         String userId, String refreshTokenHash2,
                                         JsonObject userDataInDatabase, long expiry, JsonObject userDataInJWT,