Improve multiGet, multiSet and multiMerge SQL operations

lib/storage/providers/SQLiteProvider.ts

@@ -127,7 +127,7 @@ const provider: StorageProvider<NitroSQLiteConnection | undefined> = {
             throw new Error('Store is not initialized!');
         }
 
-        const query = 'REPLACE INTO keyvaluepairs (record_key, valueJSON) VALUES (?, json(?));';
+        const query = 'REPLACE INTO keyvaluepairs (record_key, valueJSON) VALUES (?, ?);';
         const params = pairs.map((pair) => [pair[0], JSON.stringify(pair[1] === undefined ? null : pair[1])]);
         if (utils.isEmptyObject(params)) {
             return Promise.resolve();
@@ -143,13 +143,17 @@ const provider: StorageProvider<NitroSQLiteConnection | undefined> = {
 
         // Query to merge the change into the DB value.
         const patchQuery = `INSERT INTO keyvaluepairs (record_key, valueJSON)
-            VALUES (:key, JSON(:value))
+            VALUES (:key, :value)
             ON CONFLICT DO UPDATE
-            SET valueJSON = JSON_PATCH(valueJSON, JSON(:value));
+            SET valueJSON = JSON_PATCH(valueJSON, :value);
         `;
         const patchQueryArguments: string[][] = [];
 
         // Query to fully replace the nested objects of the DB value.
+        // NOTE: The JSON() wrapper around the replacement value is required here. Unlike JSON_PATCH (which
+        // parses both arguments as JSON internally), JSON_REPLACE treats a plain TEXT binding as a quoted
+        // JSON string. Without JSON(), objects would be stored as string values (e.g. "{...}") instead of
+        // actual JSON objects, corrupting the stored data.
         const replaceQuery = `UPDATE keyvaluepairs
             SET valueJSON = JSON_REPLACE(valueJSON, ?, JSON(?))
             WHERE record_key = ?;