Merge pull request #5 from chdb-io/session

Fix session

example.js

@@ -1,24 +1,23 @@
 const { query, Session } = require(".");
 
-var result;
+var ret;
 
 // Test standalone query
-result = query("SELECT version(), 'Hello chDB', chdb()", "CSV");
-console.log("Standalone Query Result:", result);
+ret = query("SELECT version(), 'Hello chDB', chdb()", "CSV");
+console.log("Standalone Query Result:", ret);
 
 // Test session query
 // Create a new session instance
 const session = new Session("./chdb-node-tmp");
-result = session.query("SELECT 123", "CSV")
-console.log("Session Query Result:", result);
-result = session.query("CREATE DATABASE IF NOT EXISTS testdb;" +
+ret = session.query("SELECT 123", "CSV")
+console.log("Session Query Result:", ret);
+ret = session.query("CREATE DATABASE IF NOT EXISTS testdb;" +
     "CREATE TABLE IF NOT EXISTS testdb.testtable (id UInt32) ENGINE = MergeTree() ORDER BY id;");
 
 session.query("USE testdb; INSERT INTO testtable VALUES (1), (2), (3);")
 
-result = session.query("SELECT * FROM testtable;")
-console.log("Session Query Result:", result);
-
+ret = session.query("SELECT * FROM testtable;")
+console.log("Session Query Result:", ret);
 
 // Clean up the session
 session.cleanup();