@tdengine/websocket/lib/example/all_type_stmt.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");
const log_1 = require("../src/common/log");
let dsn = 'ws://127.0.0.1:6041';
async function json_tag_example() {
    let wsSql = null;
    try {
        let conf = new config_1.WSConfig(dsn);
        conf.setUser('root');
        conf.setPwd('taosdata');
        wsSql = await (0, src_1.sqlConnect)(conf);
        console.log("Connected to " + dsn + " successfully.");
        // create database
        await wsSql.exec('CREATE DATABASE IF NOT EXISTS example_json_tag');
        console.log("Create database example_json_tag successfully.");
        await wsSql.exec('use example_json_tag');
        // create table
        await wsSql.exec('create table if not exists stb (ts timestamp, v int) tags(jt json)');
        console.log("Create stable example_json_tag.stb successfully");
        let stmt = await wsSql.stmtInit();
        await stmt.prepare("INSERT INTO ? using stb tags(?) VALUES (?,?)");
        await stmt.setTableName(`tb1`);
        let tagParams = stmt.newStmtParam();
        tagParams.setJson(['{"name":"value"}']);
        await stmt.setTags(tagParams);
        let bindParams = stmt.newStmtParam();
        const currentMillis = new Date().getTime();
        bindParams.setTimestamp([currentMillis]);
        bindParams.setInt([1]);
        await stmt.bind(bindParams);
        await stmt.batch();
        await stmt.exec();
        await stmt.close();
        let sql = 'SELECT ts, v, jt FROM example_json_tag.stb limit 100';
        let wsRows = await wsSql.query(sql);
        while (await wsRows.next()) {
            let row = wsRows.getData();
            if (row) {
                console.log('ts: ' + row[0] + ', v: ' + row[1] + ', jt:  ' + row[2]);
            }
        }
    }
    catch (err) {
        console.error(`Failed to create database example_json_tag or stable stb, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
    }
    finally {
        if (wsSql) {
            await wsSql.close();
        }
    }
}
async function all_type_example() {
    let wsSql = null;
    let stmt = null;
    try {
        let conf = new config_1.WSConfig(dsn);
        conf.setUser('root');
        conf.setPwd('taosdata');
        wsSql = await (0, src_1.sqlConnect)(conf);
        console.log("Connected to " + dsn + " successfully.");
        // create database
        await wsSql.exec('CREATE DATABASE IF NOT EXISTS all_type_example');
        console.log("Create database all_type_example successfully.");
        await wsSql.exec('use all_type_example');
        // create table
        await wsSql.exec('create table if not exists stb (ts timestamp, ' +
            'int_col INT, double_col DOUBLE, bool_col BOOL, binary_col BINARY(100),' +
            'nchar_col NCHAR(100), varbinary_col VARBINARY(100), geometry_col GEOMETRY(100)) ' +
            'tags(int_tag INT, double_tag DOUBLE, bool_tag BOOL, binary_tag BINARY(100),' +
            'nchar_tag NCHAR(100), varbinary_tag VARBINARY(100), geometry_tag GEOMETRY(100));');
        console.log("Create stable all_type_example.stb successfully");
        let geometryData = new Uint8Array([0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x59, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40,]).buffer;
        const encoder = new TextEncoder();
        let vbData = encoder.encode(`Hello, world!`).buffer;
        stmt = await wsSql.stmtInit();
        await stmt.prepare("INSERT INTO ? using stb tags(?,?,?,?,?,?,?) VALUES (?,?,?,?,?,?,?,?)");
        await stmt.setTableName(`tb1`);
        let tagParams = stmt.newStmtParam();
        tagParams.setInt([1]);
        tagParams.setDouble([1.1]);
        tagParams.setBoolean([true]);
        tagParams.setVarchar(["hello"]);
        tagParams.setNchar(["stmt"]);
        tagParams.setGeometry([geometryData]);
        tagParams.setVarBinary([vbData]);
        await stmt.setTags(tagParams);
        let bindParams = stmt.newStmtParam();
        const currentMillis = new Date().getTime();
        bindParams.setTimestamp([currentMillis]);
        bindParams.setInt([1]);
        bindParams.setDouble([1.1]);
        bindParams.setBoolean([true]);
        bindParams.setVarchar(["hello"]);
        bindParams.setNchar(["stmt"]);
        bindParams.setGeometry([geometryData]);
        bindParams.setVarBinary([vbData]);
        await stmt.bind(bindParams);
        await stmt.batch();
        await stmt.exec();
        let sql = 'SELECT * FROM all_type_example.stb limit 100';
        let wsRows = await wsSql.query(sql);
        let meta = wsRows.getMeta();
        console.log("wsRow:meta:=>", meta);
        while (await wsRows.next()) {
            let row = wsRows.getData();
            console.log(row);
        }
    }
    catch (err) {
        console.error(`Failed to create database all_type_example or stable stb, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
    }
    finally {
        if (stmt) {
            await stmt.close();
        }
        if (wsSql) {
            await wsSql.close();
        }
    }
}
async function test() {
    (0, log_1.setLevel)("debug");
    await json_tag_example();
    await all_type_example();
    (0, src_1.destroy)();
}
test();