74 lines
2.6 KiB
JavaScript
74 lines
2.6 KiB
JavaScript
const taos = require("@tdengine/websocket");
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let db = 'power';
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let stable = 'meters';
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let numOfSubTable = 10;
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let numOfRow = 10;
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let dsn = 'ws://localhost:6041'
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function getRandomInt(min, max) {
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min = Math.ceil(min);
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max = Math.floor(max);
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return Math.floor(Math.random() * (max - min + 1)) + min;
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}
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async function prepare() {
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let conf = new taos.WSConfig(dsn);
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conf.setUser('root')
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conf.setPwd('taosdata')
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conf.setDb(db)
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let wsSql = await taos.sqlConnect(conf);
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await wsSql.exec(`CREATE DATABASE IF NOT EXISTS ${db} KEEP 3650 DURATION 10 BUFFER 16 WAL_LEVEL 1;`);
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await wsSql.exec(`CREATE STABLE IF NOT EXISTS ${db}.${stable} (ts timestamp, current float, voltage int, phase float) TAGS (location binary(64), groupId int);`);
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return wsSql
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}
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(async () => {
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let stmt = null;
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let connector = null;
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try {
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connector = await prepare();
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stmt = await connector.stmtInit();
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await stmt.prepare(`INSERT INTO ? USING ${db}.${stable} (location, groupId) TAGS (?, ?) VALUES (?, ?, ?, ?)`);
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for (let i = 0; i < numOfSubTable; i++) {
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await stmt.setTableName(`d_bind_${i}`);
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let tagParams = stmt.newStmtParam();
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tagParams.setVarchar([`location_${i}`]);
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tagParams.setInt([i]);
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await stmt.setTags(tagParams);
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let timestampParams = [];
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let currentParams = [];
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let voltageParams = [];
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let phaseParams = [];
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const currentMillis = new Date().getTime();
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for (let j = 0; j < numOfRow; j++) {
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timestampParams.push(currentMillis + j);
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currentParams.push(Math.random() * 30);
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voltageParams.push(getRandomInt(100, 300));
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phaseParams.push(Math.random());
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}
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let bindParams = stmt.newStmtParam();
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bindParams.setTimestamp(timestampParams);
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bindParams.setFloat(currentParams);
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bindParams.setInt(voltageParams);
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bindParams.setFloat(phaseParams);
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await stmt.bind(bindParams);
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await stmt.batch();
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await stmt.exec();
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console.log("Successfully inserted " + stmt.getLastAffected() + " to power.meters.");
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}
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}
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catch (err) {
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console.error("Failed to insert to table meters using stmt, url:" + dsn + "ErrCode:" + err.code + "; ErrMessage: " + err.message);
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}
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finally {
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if (stmt) {
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await stmt.close();
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}
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if (connector) {
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await connector.close();
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}
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taos.destroy();
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}
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})();
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