change

src/connector/nodejs/test/testNull.js

-const taos = require('../tdengine');
-var conn = taos.connect({host: "127.0.0.1", user: "root", password: "taosdata", config: "/etc/taos", port: 6030});
-var c1 = conn.cursor();
-
-
-c1.query('select * from test.weather', true).then(function (result) {
-    result.pretty();
-});
-
-conn.close();
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