modify nodejs example
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menshibin
parent
2355e2f8de
commit
cf0996b1f9
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const taos = require("@tdengine/websocket");
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let dsn = 'ws://127.0.0.1:6041';
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async function json_tag_example() {
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let wsSql = null;
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try {
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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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wsSql = await taos.sqlConnect(conf);
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console.log("Connected to " + dsn + " successfully.");
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// create database
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await wsSql.exec('CREATE DATABASE IF NOT EXISTS example_json_tag');
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console.log("Create database example_json_tag successfully.");
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// create table
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await wsSql.exec('create table if not exists example_json_tag.stb (ts timestamp, v int) tags(jt json)');
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console.log("Create stable example_json_tag.stb successfully");
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let insertQuery = 'INSERT INTO ' +
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'example_json_tag.tb1 USING example_json_tag.stb TAGS(\'{"name":"value"}\') ' +
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"values(now, 1) ";
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taosResult = await wsSql.exec(insertQuery);
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console.log("Successfully inserted " + taosResult.getAffectRows() + " rows to example_json_tag.stb.");
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let sql = 'SELECT ts, v, jt FROM example_json_tag.stb limit 100';
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wsRows = await wsSql.query(sql);
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while (await wsRows.next()) {
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let row = wsRows.getData();
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console.log('ts: ' + row[0] + ', v: ' + row[1] + ', jt: ' + row[2]);
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}
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} catch (err) {
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console.error(`Failed to create database example_json_tag or stable stb, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
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} finally {
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if (wsSql) {
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await wsSql.close();
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}
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}
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}
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async function all_type_example() {
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let wsSql = null;
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try {
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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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wsSql = await taos.sqlConnect(conf);
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console.log("Connected to " + dsn + " successfully.");
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// create database
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await wsSql.exec('CREATE DATABASE IF NOT EXISTS all_type_example');
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console.log("Create database all_type_example successfully.");
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// create table
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await wsSql.exec('create table if not exists all_type_example.stb (ts timestamp, ' +
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'int_col INT, double_col DOUBLE, bool_col BOOL, binary_col BINARY(100),' +
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'nchar_col NCHAR(100), varbinary_col VARBINARY(100), geometry_col GEOMETRY(100)) ' +
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'tags(int_tag INT, double_tag DOUBLE, bool_tag BOOL, binary_tag BINARY(100),' +
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'nchar_tag NCHAR(100), varbinary_tag VARBINARY(100), geometry_tag GEOMETRY(100));');
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console.log("Create stable all_type_example.stb successfully");
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let insertQuery = "INSERT INTO all_type_example.tb1 using all_type_example.stb "
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+ "tags(1, 1.1, true, 'binary_value', 'nchar_value', '\\x98f46e', 'POINT(100 100)') "
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+ "values(now, 1, 1.1, true, 'binary_value', 'nchar_value', '\\x98f46e', 'POINT(100 100)')";
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taosResult = await wsSql.exec(insertQuery);
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console.log("Successfully inserted " + taosResult.getAffectRows() + " rows to all_type_example.stb.");
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let sql = 'SELECT * FROM all_type_example.stb limit 100';
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let wsRows = await wsSql.query(sql);
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let meta = wsRows.getMeta();
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console.log("wsRow:meta:=>", meta);
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while (await wsRows.next()) {
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let row = wsRows.getData();
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console.log(row);
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}
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} catch (err) {
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console.error(`Failed to create database all_type_example or stable stb, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
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} finally {
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if (wsSql) {
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await wsSql.close();
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}
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}
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}
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async function test() {
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await json_tag_example()
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await all_type_example()
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taos.destroy();
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}
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test()
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@ -0,0 +1,149 @@
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const taos = require("@tdengine/websocket");
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let dsn = 'ws://127.0.0.1:6041';
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async function json_tag_example() {
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let wsSql = null;
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try {
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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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wsSql = await taos.sqlConnect(conf);
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console.log("Connected to " + dsn + " successfully.");
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// create database
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await wsSql.exec('CREATE DATABASE IF NOT EXISTS example_json_tag');
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console.log("Create database example_json_tag successfully.");
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await wsSql.exec('use example_json_tag');
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// create table
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await wsSql.exec('create table if not exists stb (ts timestamp, v int) tags(jt json)');
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console.log("Create stable example_json_tag.stb successfully");
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let stmt = await wsSql.stmtInit();
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await stmt.prepare("INSERT INTO ? using stb tags(?) VALUES (?,?)");
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await stmt.setTableName(`tb1`);
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let tagParams = stmt.newStmtParam();
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tagParams.setJson(['{"name":"value"}'])
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await stmt.setTags(tagParams);
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let bindParams = stmt.newStmtParam();
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const currentMillis = new Date().getTime();
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bindParams.setTimestamp([currentMillis]);
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bindParams.setInt([1]);
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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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await stmt.close();
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let sql = 'SELECT ts, v, jt FROM example_json_tag.stb limit 100';
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wsRows = await wsSql.query(sql);
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while (await wsRows.next()) {
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let row = wsRows.getData();
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console.log('ts: ' + row[0] + ', v: ' + row[1] + ', jt: ' + row[2]);
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}
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} catch (err) {
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console.error(`Failed to create database example_json_tag or stable stb, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
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} finally {
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if (wsSql) {
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await wsSql.close();
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}
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}
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}
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async function all_type_example() {
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let wsSql = null;
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let stmt = null;
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try {
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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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wsSql = await taos.sqlConnect(conf);
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console.log("Connected to " + dsn + " successfully.");
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// create database
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await wsSql.exec('CREATE DATABASE IF NOT EXISTS all_type_example');
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console.log("Create database all_type_example successfully.");
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await wsSql.exec('use all_type_example');
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// create table
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await wsSql.exec('create table if not exists stb (ts timestamp, ' +
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'int_col INT, double_col DOUBLE, bool_col BOOL, binary_col BINARY(100),' +
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'nchar_col NCHAR(100), varbinary_col VARBINARY(100), geometry_col GEOMETRY(100)) ' +
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'tags(int_tag INT, double_tag DOUBLE, bool_tag BOOL, binary_tag BINARY(100),' +
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'nchar_tag NCHAR(100), varbinary_tag VARBINARY(100), geometry_tag GEOMETRY(100));');
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console.log("Create stable all_type_example.stb successfully");
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let geometryData = new Uint8Array([0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x59,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x59,0x40,]).buffer;
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const encoder = new TextEncoder();
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let vbData = encoder.encode(`Hello, world!`).buffer;
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stmt = await wsSql.stmtInit();
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await stmt.prepare("INSERT INTO ? using stb tags(?,?,?,?,?,?,?) VALUES (?,?,?,?,?,?,?,?)");
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await stmt.setTableName(`tb1`);
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let tagParams = stmt.newStmtParam();
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tagParams.setInt([1]);
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tagParams.setDouble([1.1]);
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tagParams.setBoolean([true]);
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tagParams.setVarchar(["hello"]);
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tagParams.setNchar(["stmt"]);
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tagParams.setGeometry([geometryData]);
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tagParams.setVarBinary([vbData]);
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await stmt.setTags(tagParams);
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let bindParams = stmt.newStmtParam();
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const currentMillis = new Date().getTime();
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bindParams.setTimestamp([currentMillis]);
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bindParams.setInt([1]);
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bindParams.setDouble([1.1]);
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bindParams.setBoolean([true]);
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bindParams.setVarchar(["hello"]);
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bindParams.setNchar(["stmt"]);
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bindParams.setGeometry([geometryData]);
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bindParams.setVarBinary([vbData]);
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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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let sql = 'SELECT * FROM all_type_example.stb limit 100';
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let wsRows = await wsSql.query(sql);
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let meta = wsRows.getMeta();
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console.log("wsRow:meta:=>", meta);
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while (await wsRows.next()) {
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let row = wsRows.getData();
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console.log(row);
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}
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} catch (err) {
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console.error(`Failed to create database all_type_example or stable stb, ErrCode: ${err.code}, ErrMessage: ${err.message}`);
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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 (wsSql) {
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await wsSql.close();
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}
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}
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}
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async function test() {
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taos.setLevel("debug")
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await json_tag_example()
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await all_type_example()
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taos.destroy();
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}
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test()
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