@tdengine/websocket/lib/example/basicSql.js

The websocket Node.js connector for TDengine. TDengine versions 3.3.2.0 and above are recommended to use this connector.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const config_1 = require("../src/common/config");
const src_1 = require("../src");
let dsn = 'ws://root:taosdata@localhost:6041';
(async () => {
    let wsSql = null;
    let wsRows = null;
    let reqId = 0;
    try {
        (0, src_1.setLogLevel)("debug");
        let conf = new config_1.WSConfig(dsn);
        conf.setUser('root');
        conf.setPwd('taosdata');
        wsSql = await (0, src_1.sqlConnect)(conf);
        let version = await wsSql.version();
        console.log(version);
        let taosResult = await wsSql.exec('show databases', reqId++);
        console.log(taosResult);
        taosResult = await wsSql.exec('create database if not exists power KEEP 3650 DURATION 10 BUFFER 16 WAL_LEVEL 1;', reqId++);
        console.log(taosResult);
        taosResult = await wsSql.exec('use power', reqId++);
        console.log(taosResult);
        taosResult = await wsSql.exec('CREATE STABLE if not exists meters (ts timestamp, current float, voltage int, phase float) TAGS (location binary(64), groupId int);', reqId++);
        console.log(taosResult);
        taosResult = await wsSql.exec('describe meters', reqId++);
        console.log(taosResult);
        taosResult = await wsSql.exec('INSERT INTO d1001 USING meters TAGS ("California.SanFrancisco", 3) VALUES (NOW, 10.2, 219, 0.32)', reqId++);
        console.log(taosResult);
        for (let i = 0; i < 100; i++) {
            wsRows = await wsSql.query('select * from meters', reqId++);
            let meta = wsRows.getMeta();
            console.log("wsRow:meta:=>", meta);
            while (await wsRows.next()) {
                let result = wsRows.getData();
                console.log('queryRes.Scan().then=>', result);
            }
            await wsRows.close();
        }
    }
    catch (err) {
        console.error(err.code, err.message);
    }
    finally {
        if (wsRows) {
            await wsRows.close();
        }
        if (wsSql) {
            await wsSql.close();
        }
        (0, src_1.destroy)();
        console.log("finish!");
    }
})();