feat: MySQL Tracing Support

[kamilogorek]

MySQL and MariaDB tracing support.

Usage:

constSentry=require("@sentry/node");constTracing=require("@sentry/tracing");constmysql=require("mysql");Sentry.init({dsn: "__PUBLIC_DSN__",integrations: [newTracing.Integrations.Mysql(),],tracesSampleRate: 1.0,});constconnection=mysql.createConnection({user: "root",password: "docker",});connection.connect(function(err){if(err){console.error("error connecting: "+err.stack);return;}console.log("connected as id "+connection.threadId);});// the rest of the code, for raw-node code we need manual instrumentation, eg.consttransaction=Sentry.startTransaction({op: "transaction",name: "My Transaction",});Sentry.configureScope((scope)=>{scope.setSpan(transaction);});connection.query("SELECT 1 + 1 AS solution",function(error,results,fields){console.log(err ? err.stack : results[0].solution);// 2if(transaction)transaction.finish();connection.end();});

Works nicely with Express too:

constSentry=require("@sentry/node");constTracing=require("@sentry/tracing");constmysql=require("mysql");constexpress=require("express");Sentry.init({dsn: "__PUBLIC_DSN__",integrations: [newSentry.Integrations.Http({tracing: true}),newTracing.Integrations.Express({app: express.Router,methods: ["get"],}),newTracing.Integrations.Mysql(),],tracesSampleRate: 1.0,});constapp=express();constconnection=mysql.createConnection({user: "root",password: "docker",});connection.connect();app.use(Sentry.Handlers.requestHandler());app.use(Sentry.Handlers.tracingHandler());app.use(express.json());app.get("/hi",functionsayHi(req,res){connection.query("SELECT 1 + 1 AS solution",function(error,results,fields){res.send(results[0].solution);});});app.use(Sentry.Handlers.errorHandler());app.listen(3000);

[github-actions]

size-limit report

Path	Size
@sentry/browser - CDN Bundle (gzipped)	19.73 KB (-0.01% 🔽)
@sentry/browser - Webpack	20.6 KB (0%)
@sentry/react - Webpack	20.6 KB (0%)
@sentry/browser + @sentry/tracing - CDN Bundle (gzipped)	26.88 KB (-0.01% 🔽)

[lobsterkatie]

One small nit, but otherwise LGTM!

P.S. Any possibility of adding some tests?