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@databricks/sql - npm Package Compare versions

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1.13.0

1.14.0

+73

dist/telemetry/CircuitBreaker.d.ts

		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		import IClientContext from '../contracts/IClientContext';
		export declare enum CircuitBreakerState {
		CLOSED = "CLOSED",
		OPEN = "OPEN",
		HALF_OPEN = "HALF_OPEN"
		}
		export interface CircuitBreakerConfig {
		failureThreshold: number;
		timeout: number;
		successThreshold: number;
		}
		export declare const DEFAULT_CIRCUIT_BREAKER_CONFIG: Readonly<CircuitBreakerConfig>;
		export declare const CIRCUIT_BREAKER_OPEN_CODE: "CIRCUIT_BREAKER_OPEN";
		/**
		* Thrown when execute() is called while the breaker is OPEN or a HALF_OPEN
		* probe is already in flight. Callers identify the condition via
		* `instanceof CircuitBreakerOpenError` or `err.code === CIRCUIT_BREAKER_OPEN_CODE`
		* rather than string-matching the message.
		*/
		export declare class CircuitBreakerOpenError extends Error {
		readonly code: "CIRCUIT_BREAKER_OPEN";
		constructor(message?: string);
		}
		export declare class CircuitBreaker {
		private context;
		private state;
		private failureCount;
		private successCount;
		private nextAttempt?;
		private halfOpenInflight;
		private readonly config;
		constructor(context: IClientContext, config?: Partial<CircuitBreakerConfig>);
		execute<T>(operation: () => Promise<T>): Promise<T>;
		/**
		* Synchronous admission check. Returning `null` means "reject". Returning
		* an object means the caller is admitted; `wasHalfOpenProbe` indicates
		* whether this admission consumed the single HALF_OPEN probe slot so the
		* caller can decrement it in `finally`.
		*
		* Running this as a single synchronous block is what prevents the
		* concurrent-probe race that existed in the previous implementation.
		*/
		private tryAdmit;
		getState(): CircuitBreakerState;
		getFailureCount(): number;
		getSuccessCount(): number;
		private onSuccess;
		private onFailure;
		}
		export declare class CircuitBreakerRegistry {
		private context;
		private breakers;
		constructor(context: IClientContext);
		getCircuitBreaker(host: string, config?: Partial<CircuitBreakerConfig>): CircuitBreaker;
		getAllBreakers(): Map<string, CircuitBreaker>;
		removeCircuitBreaker(host: string): void;
		clear(): void;
		}

+176

dist/telemetry/CircuitBreaker.js

		"use strict";
		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		Object.defineProperty(exports, "__esModule", { value: true });
		exports.CircuitBreakerRegistry = exports.CircuitBreaker = exports.CircuitBreakerOpenError = exports.CIRCUIT_BREAKER_OPEN_CODE = exports.DEFAULT_CIRCUIT_BREAKER_CONFIG = exports.CircuitBreakerState = void 0;
		const IDBSQLLogger_1 = require("../contracts/IDBSQLLogger");
		var CircuitBreakerState;
		(function (CircuitBreakerState) {
		CircuitBreakerState["CLOSED"] = "CLOSED";
		CircuitBreakerState["OPEN"] = "OPEN";
		CircuitBreakerState["HALF_OPEN"] = "HALF_OPEN";
		})(CircuitBreakerState = exports.CircuitBreakerState \|\| (exports.CircuitBreakerState = {}));
		exports.DEFAULT_CIRCUIT_BREAKER_CONFIG = Object.freeze({
		failureThreshold: 5,
		timeout: 60000,
		successThreshold: 2,
		});
		exports.CIRCUIT_BREAKER_OPEN_CODE = 'CIRCUIT_BREAKER_OPEN';
		/**
		* Thrown when execute() is called while the breaker is OPEN or a HALF_OPEN
		* probe is already in flight. Callers identify the condition via
		* `instanceof CircuitBreakerOpenError` or `err.code === CIRCUIT_BREAKER_OPEN_CODE`
		* rather than string-matching the message.
		*/
		class CircuitBreakerOpenError extends Error {
		constructor(message = 'Circuit breaker OPEN') {
		super(message);
		this.code = exports.CIRCUIT_BREAKER_OPEN_CODE;
		this.name = 'CircuitBreakerOpenError';
		}
		}
		exports.CircuitBreakerOpenError = CircuitBreakerOpenError;
		class CircuitBreaker {
		constructor(context, config) {
		this.context = context;
		this.state = CircuitBreakerState.CLOSED;
		this.failureCount = 0;
		this.successCount = 0;
		this.halfOpenInflight = 0;
		this.config = {
		...exports.DEFAULT_CIRCUIT_BREAKER_CONFIG,
		...config,
		};
		}
		async execute(operation) {
		const admitted = this.tryAdmit();
		if (!admitted) {
		throw new CircuitBreakerOpenError();
		}
		const { wasHalfOpenProbe } = admitted;
		try {
		const result = await operation();
		this.onSuccess();
		return result;
		}
		catch (error) {
		this.onFailure();
		throw error;
		}
		finally {
		if (wasHalfOpenProbe && this.halfOpenInflight > 0) {
		this.halfOpenInflight -= 1;
		}
		}
		}
		/**
		* Synchronous admission check. Returning `null` means "reject". Returning
		* an object means the caller is admitted; `wasHalfOpenProbe` indicates
		* whether this admission consumed the single HALF_OPEN probe slot so the
		* caller can decrement it in `finally`.
		*
		* Running this as a single synchronous block is what prevents the
		* concurrent-probe race that existed in the previous implementation.
		*/
		tryAdmit() {
		const logger = this.context.getLogger();
		if (this.state === CircuitBreakerState.OPEN) {
		if (this.nextAttempt && Date.now() < this.nextAttempt.getTime()) {
		return null;
		}
		this.state = CircuitBreakerState.HALF_OPEN;
		this.successCount = 0;
		this.halfOpenInflight = 0;
		logger.log(IDBSQLLogger_1.LogLevel.debug, 'Circuit breaker transitioned to HALF_OPEN');
		}
		if (this.state === CircuitBreakerState.HALF_OPEN) {
		if (this.halfOpenInflight > 0) {
		return null;
		}
		this.halfOpenInflight += 1;
		return { wasHalfOpenProbe: true };
		}
		return { wasHalfOpenProbe: false };
		}
		getState() {
		return this.state;
		}
		getFailureCount() {
		return this.failureCount;
		}
		getSuccessCount() {
		return this.successCount;
		}
		onSuccess() {
		const logger = this.context.getLogger();
		this.failureCount = 0;
		if (this.state === CircuitBreakerState.HALF_OPEN) {
		this.successCount += 1;
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Circuit breaker success in HALF_OPEN (${this.successCount}/${this.config.successThreshold})`);
		if (this.successCount >= this.config.successThreshold) {
		this.state = CircuitBreakerState.CLOSED;
		this.successCount = 0;
		this.nextAttempt = undefined;
		logger.log(IDBSQLLogger_1.LogLevel.debug, 'Circuit breaker transitioned to CLOSED');
		}
		}
		}
		onFailure() {
		const logger = this.context.getLogger();
		this.failureCount += 1;
		this.successCount = 0;
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Circuit breaker failure (${this.failureCount}/${this.config.failureThreshold})`);
		if (this.state === CircuitBreakerState.HALF_OPEN \|\| this.failureCount >= this.config.failureThreshold) {
		this.state = CircuitBreakerState.OPEN;
		this.nextAttempt = new Date(Date.now() + this.config.timeout);
		logger.log(IDBSQLLogger_1.LogLevel.warn, `Telemetry circuit breaker OPEN after ${this.failureCount} failures (will retry after ${this.config.timeout}ms)`);
		}
		}
		}
		exports.CircuitBreaker = CircuitBreaker;
		class CircuitBreakerRegistry {
		constructor(context) {
		this.context = context;
		this.breakers = new Map();
		}
		getCircuitBreaker(host, config) {
		let breaker = this.breakers.get(host);
		if (!breaker) {
		breaker = new CircuitBreaker(this.context, config);
		this.breakers.set(host, breaker);
		const logger = this.context.getLogger();
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Created circuit breaker for host: ${host}`);
		}
		else if (config) {
		const logger = this.context.getLogger();
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Circuit breaker for host ${host} already exists; provided config will be ignored`);
		}
		return breaker;
		}
		getAllBreakers() {
		return new Map(this.breakers);
		}
		removeCircuitBreaker(host) {
		this.breakers.delete(host);
		const logger = this.context.getLogger();
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Removed circuit breaker for host: ${host}`);
		}
		clear() {
		this.breakers.clear();
		}
		}
		exports.CircuitBreakerRegistry = CircuitBreakerRegistry;
		//# sourceMappingURL=CircuitBreaker.js.map

+1

dist/telemetry/CircuitBreaker.js.map

+76

dist/telemetry/DatabricksTelemetryExporter.d.ts

		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		import IClientContext from '../contracts/IClientContext';
		import IAuthentication from '../connection/contracts/IAuthentication';
		import HiveDriverError from '../errors/HiveDriverError';
		import { TelemetryMetric } from './types';
		import { CircuitBreakerRegistry } from './CircuitBreaker';
		/**
		* Thrown for non-credential terminal telemetry failures (e.g. refusal to
		* export to an invalid host). Separate from `AuthenticationError` so the
		* classifier can keep the "short-circuit, don't retry, count as breaker
		* failure" contract without muddying the auth taxonomy used by the rest of
		* the driver.
		*/
		export declare class TelemetryTerminalError extends HiveDriverError {
		readonly terminal: true;
		}
		/**
		* Exports telemetry metrics to the Databricks telemetry service.
		*
		* CRITICAL: export() never throws — all errors are swallowed and logged at
		* LogLevel.debug (the one exception is a single warn on the first observed
		* auth-missing, re-armed on recovery).
		*/
		export default class DatabricksTelemetryExporter {
		private context;
		private host;
		private circuitBreakerRegistry;
		private authProvider?;
		private readonly circuitBreaker;
		private readonly authenticatedUserAgent;
		/** User-Agent used for the unauthenticated endpoint; strips any
		* caller-supplied `userAgentEntry` that could identify the customer. */
		private readonly unauthenticatedUserAgent;
		private authMissingWarned;
		constructor(context: IClientContext, host: string, circuitBreakerRegistry: CircuitBreakerRegistry, authProvider?: IAuthentication \| undefined);
		/**
		* Release the per-host circuit breaker. Intended for the owning client's
		* close() path.
		*
		* NOTE: `CircuitBreakerRegistry` currently shares one breaker per host
		* across consumers; calling this while another consumer is active will
		* reset their failure-count memory. The owning-client is expected to be
		* the last consumer on its host; multi-consumer refcounting on the
		* registry will land in the consumer-wiring PR.
		*/
		dispose(): void;
		export(metrics: TelemetryMetric[]): Promise<void>;
		/**
		* Retry wrapper shaped after HttpRetryPolicy: retries only on errors
		* classified as retryable by ExceptionClassifier, stops on terminal ones,
		* surfaces the last error to the circuit breaker.
		*
		* `maxRetries` is the number of retries after the first attempt (i.e.
		* attempts = maxRetries + 1), matching HttpRetryPolicy's semantics.
		*/
		private exportWithRetry;
		private exportInternal;
		private getAuthHeaders;
		private sendRequest;
		private toTelemetryLog;
		private sleep;
		}

+324

dist/telemetry/DatabricksTelemetryExporter.js

		"use strict";
		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		var __createBinding = (this && this.__createBinding) \|\| (Object.create ? (function(o, m, k, k2) {
		if (k2 === undefined) k2 = k;
		var desc = Object.getOwnPropertyDescriptor(m, k);
		if (!desc \|\| ("get" in desc ? !m.__esModule : desc.writable \|\| desc.configurable)) {
		desc = { enumerable: true, get: function() { return m[k]; } };
		}
		Object.defineProperty(o, k2, desc);
		}) : (function(o, m, k, k2) {
		if (k2 === undefined) k2 = k;
		o[k2] = m[k];
		}));
		var __setModuleDefault = (this && this.__setModuleDefault) \|\| (Object.create ? (function(o, v) {
		Object.defineProperty(o, "default", { enumerable: true, value: v });
		}) : function(o, v) {
		o["default"] = v;
		});
		var __importStar = (this && this.__importStar) \|\| function (mod) {
		if (mod && mod.__esModule) return mod;
		var result = {};
		if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
		__setModuleDefault(result, mod);
		return result;
		};
		var __importDefault = (this && this.__importDefault) \|\| function (mod) {
		return (mod && mod.__esModule) ? mod : { "default": mod };
		};
		Object.defineProperty(exports, "__esModule", { value: true });
		exports.TelemetryTerminalError = void 0;
		const uuid_1 = require("uuid");
		const node_fetch_1 = __importStar(require("node-fetch"));
		const IDBSQLLogger_1 = require("../contracts/IDBSQLLogger");
		const AuthenticationError_1 = __importDefault(require("../errors/AuthenticationError"));
		const HiveDriverError_1 = __importDefault(require("../errors/HiveDriverError"));
		const types_1 = require("./types");
		const CircuitBreaker_1 = require("./CircuitBreaker");
		const ExceptionClassifier_1 = __importDefault(require("./ExceptionClassifier"));
		const telemetryUtils_1 = require("./telemetryUtils");
		const buildUserAgentString_1 = __importDefault(require("../utils/buildUserAgentString"));
		/**
		* Thrown for non-credential terminal telemetry failures (e.g. refusal to
		* export to an invalid host). Separate from `AuthenticationError` so the
		* classifier can keep the "short-circuit, don't retry, count as breaker
		* failure" contract without muddying the auth taxonomy used by the rest of
		* the driver.
		*/
		class TelemetryTerminalError extends HiveDriverError_1.default {
		constructor() {
		super(...arguments);
		this.terminal = true;
		}
		}
		exports.TelemetryTerminalError = TelemetryTerminalError;
		/**
		* Exports telemetry metrics to the Databricks telemetry service.
		*
		* CRITICAL: export() never throws — all errors are swallowed and logged at
		* LogLevel.debug (the one exception is a single warn on the first observed
		* auth-missing, re-armed on recovery).
		*/
		class DatabricksTelemetryExporter {
		constructor(context, host, circuitBreakerRegistry, authProvider) {
		this.context = context;
		this.host = host;
		this.circuitBreakerRegistry = circuitBreakerRegistry;
		this.authProvider = authProvider;
		this.authMissingWarned = false;
		this.circuitBreaker = circuitBreakerRegistry.getCircuitBreaker(host);
		const config = this.context.getConfig();
		this.authenticatedUserAgent = (0, buildUserAgentString_1.default)(config.userAgentEntry);
		this.unauthenticatedUserAgent = (0, buildUserAgentString_1.default)(undefined);
		}
		/**
		* Release the per-host circuit breaker. Intended for the owning client's
		* close() path.
		*
		* NOTE: `CircuitBreakerRegistry` currently shares one breaker per host
		* across consumers; calling this while another consumer is active will
		* reset their failure-count memory. The owning-client is expected to be
		* the last consumer on its host; multi-consumer refcounting on the
		* registry will land in the consumer-wiring PR.
		*/
		dispose() {
		this.circuitBreakerRegistry.removeCircuitBreaker(this.host);
		}
		async export(metrics) {
		var _a;
		if (!metrics \|\| metrics.length === 0) {
		return;
		}
		const logger = this.context.getLogger();
		try {
		await this.circuitBreaker.execute(() => this.exportWithRetry(metrics));
		}
		catch (error) {
		if (error instanceof CircuitBreaker_1.CircuitBreakerOpenError) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, 'Circuit breaker OPEN - dropping telemetry');
		}
		else if (error instanceof AuthenticationError_1.default) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Telemetry export auth failure: ${error.message}`);
		}
		else if (error instanceof TelemetryTerminalError) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Telemetry export refused: ${error.message}`);
		}
		else {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Telemetry export error: ${(_a = error === null \|\| error === void 0 ? void 0 : error.message) !== null && _a !== void 0 ? _a : error}`);
		}
		}
		}
		/**
		* Retry wrapper shaped after HttpRetryPolicy: retries only on errors
		* classified as retryable by ExceptionClassifier, stops on terminal ones,
		* surfaces the last error to the circuit breaker.
		*
		* `maxRetries` is the number of retries after the first attempt (i.e.
		* attempts = maxRetries + 1), matching HttpRetryPolicy's semantics.
		*/
		async exportWithRetry(metrics) {
		var _a, _b, _c, _d, _e, _f;
		const config = this.context.getConfig();
		const logger = this.context.getLogger();
		const rawMaxRetries = (_a = config.telemetryMaxRetries) !== null && _a !== void 0 ? _a : types_1.DEFAULT_TELEMETRY_CONFIG.maxRetries;
		const maxRetries = Number.isFinite(rawMaxRetries) && rawMaxRetries >= 0 ? rawMaxRetries : types_1.DEFAULT_TELEMETRY_CONFIG.maxRetries;
		const baseMs = (_b = config.telemetryBackoffBaseMs) !== null && _b !== void 0 ? _b : types_1.DEFAULT_TELEMETRY_CONFIG.backoffBaseMs;
		const maxMs = (_c = config.telemetryBackoffMaxMs) !== null && _c !== void 0 ? _c : types_1.DEFAULT_TELEMETRY_CONFIG.backoffMaxMs;
		const jitterMs = (_d = config.telemetryBackoffJitterMs) !== null && _d !== void 0 ? _d : types_1.DEFAULT_TELEMETRY_CONFIG.backoffJitterMs;
		const totalAttempts = maxRetries + 1;
		let lastError = null;
		/* eslint-disable no-await-in-loop */
		for (let attempt = 0; attempt < totalAttempts; attempt += 1) {
		try {
		await this.exportInternal(metrics);
		return;
		}
		catch (error) {
		lastError = error;
		if (error instanceof AuthenticationError_1.default \|\|
		error instanceof TelemetryTerminalError \|\|
		ExceptionClassifier_1.default.isTerminal(error)) {
		throw error;
		}
		if (!ExceptionClassifier_1.default.isRetryable(error)) {
		throw error;
		}
		if (attempt >= totalAttempts - 1) {
		throw error;
		}
		const base = Math.min(baseMs * 2 ** attempt, maxMs);
		const jitter = Math.random() * jitterMs;
		const delay = Math.min(base + jitter, maxMs);
		// Include the failing error so ops can see what's being retried,
		// not just the cadence.
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Retrying telemetry export (attempt ${attempt + 1}/${totalAttempts}) after ${Math.round(delay)}ms: ${(_e = error === null \|\| error === void 0 ? void 0 : error.statusCode) !== null && _e !== void 0 ? _e : ''} ${(0, telemetryUtils_1.redactSensitive)((_f = error === null \|\| error === void 0 ? void 0 : error.message) !== null && _f !== void 0 ? _f : '')}`);
		await this.sleep(delay);
		}
		}
		/* eslint-enable no-await-in-loop */
		if (lastError) {
		throw lastError;
		}
		}
		async exportInternal(metrics) {
		var _a;
		const config = this.context.getConfig();
		const logger = this.context.getLogger();
		const authenticatedExport = (_a = config.telemetryAuthenticatedExport) !== null && _a !== void 0 ? _a : types_1.DEFAULT_TELEMETRY_CONFIG.authenticatedExport;
		const endpoint = (0, telemetryUtils_1.buildTelemetryUrl)(this.host, authenticatedExport ? '/telemetry-ext' : '/telemetry-unauth');
		if (!endpoint) {
		// Malformed / deny-listed host — drop the batch rather than letting
		// it target an attacker-controlled destination.
		throw new TelemetryTerminalError('Refusing telemetry export: host failed validation');
		}
		const userAgent = authenticatedExport ? this.authenticatedUserAgent : this.unauthenticatedUserAgent;
		let headers = {
		'Content-Type': 'application/json',
		'User-Agent': userAgent,
		};
		if (authenticatedExport) {
		headers = { ...headers, ...(await this.getAuthHeaders()) };
		if (!(0, telemetryUtils_1.hasAuthorization)(headers)) {
		if (!this.authMissingWarned) {
		this.authMissingWarned = true;
		logger.log(IDBSQLLogger_1.LogLevel.warn, 'Telemetry: Authorization header missing — metrics will be dropped');
		}
		throw new AuthenticationError_1.default('Telemetry export: missing Authorization header');
		}
		}
		const protoLogs = metrics.map((m) => this.toTelemetryLog(m, authenticatedExport, userAgent));
		const body = JSON.stringify({
		uploadTime: Date.now(),
		items: [],
		protoLogs: protoLogs.map((log) => JSON.stringify(log)),
		});
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Exporting ${metrics.length} telemetry metrics to ${authenticatedExport ? 'authenticated' : 'unauthenticated'} endpoint`);
		const response = await this.sendRequest(endpoint, {
		method: 'POST',
		headers,
		body,
		timeout: 10000,
		});
		if (!response.ok) {
		await response.text().catch(() => { });
		const error = new Error(`Telemetry export failed: ${response.status} ${response.statusText}`);
		error.statusCode = response.status;
		throw error;
		}
		await response.text().catch(() => { });
		// Successful round-trip re-arms the "auth missing" warn so operators see
		// a fresh signal the next time auth breaks.
		this.authMissingWarned = false;
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Successfully exported ${metrics.length} telemetry metrics`);
		}
		async getAuthHeaders() {
		var _a;
		if (!this.authProvider) {
		return {};
		}
		const logger = this.context.getLogger();
		try {
		return (0, telemetryUtils_1.normalizeHeaders)(await this.authProvider.authenticate());
		}
		catch (error) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Telemetry: auth provider threw: ${(_a = error === null \|\| error === void 0 ? void 0 : error.message) !== null && _a !== void 0 ? _a : error}`);
		return {};
		}
		}
		async sendRequest(url, init) {
		const connectionProvider = await this.context.getConnectionProvider();
		const agent = await connectionProvider.getAgent();
		const retryPolicy = await connectionProvider.getRetryPolicy();
		const requestConfig = { agent, ...init };
		const result = await retryPolicy.invokeWithRetry(() => {
		const request = new node_fetch_1.Request(url, requestConfig);
		return (0, node_fetch_1.default)(request).then((response) => ({ request, response }));
		});
		return result.response;
		}
		toTelemetryLog(metric, authenticatedExport, userAgent) {
		var _a, _b;
		// Unauthenticated export must not ship correlation IDs, fingerprint
		// data, or raw error detail — an on-path observer could otherwise link
		// sessions → workspaces → user activity without any auth.
		const includeCorrelation = authenticatedExport;
		const log = {
		workspace_id: includeCorrelation ? metric.workspaceId : undefined,
		frontend_log_event_id: (0, uuid_1.v4)(),
		context: {
		client_context: {
		timestamp_millis: metric.timestamp,
		user_agent: userAgent,
		},
		},
		entry: {
		sql_driver_log: {
		session_id: includeCorrelation ? metric.sessionId : undefined,
		sql_statement_id: includeCorrelation ? metric.statementId : undefined,
		},
		},
		};
		if (metric.metricType === 'connection' && metric.driverConfig && includeCorrelation) {
		// system_configuration is a high-entropy client fingerprint (OS, arch,
		// locale, process, runtime). Only ship on the authenticated path.
		log.entry.sql_driver_log.system_configuration = {
		driver_version: metric.driverConfig.driverVersion,
		driver_name: metric.driverConfig.driverName,
		runtime_name: 'Node.js',
		runtime_version: metric.driverConfig.nodeVersion,
		runtime_vendor: metric.driverConfig.runtimeVendor,
		os_name: metric.driverConfig.platform,
		os_version: metric.driverConfig.osVersion,
		os_arch: metric.driverConfig.osArch,
		locale_name: metric.driverConfig.localeName,
		char_set_encoding: metric.driverConfig.charSetEncoding,
		process_name: (0, telemetryUtils_1.sanitizeProcessName)(metric.driverConfig.processName) \|\| undefined,
		};
		}
		else if (metric.metricType === 'statement') {
		log.entry.sql_driver_log.operation_latency_ms = metric.latencyMs;
		if (metric.resultFormat \|\| metric.chunkCount) {
		log.entry.sql_driver_log.sql_operation = {
		execution_result: metric.resultFormat,
		};
		if (metric.chunkCount && metric.chunkCount > 0) {
		log.entry.sql_driver_log.sql_operation.chunk_details = {
		total_chunks_present: metric.chunkCount,
		total_chunks_iterated: metric.chunkCount,
		};
		}
		}
		}
		else if (metric.metricType === 'error') {
		const stackOrMessage = (_b = (_a = metric.errorStack) !== null && _a !== void 0 ? _a : metric.errorMessage) !== null && _b !== void 0 ? _b : '';
		log.entry.sql_driver_log.error_info = {
		error_name: metric.errorName \|\| 'UnknownError',
		// Redact common secret shapes and cap length. On the unauth path we
		// keep only the error class — no message body.
		stack_trace: includeCorrelation ? (0, telemetryUtils_1.redactSensitive)(stackOrMessage) : '',
		};
		}
		return log;
		}
		sleep(ms) {
		return new Promise((resolve) => {
		setTimeout(resolve, ms);
		});
		}
		}
		exports.default = DatabricksTelemetryExporter;
		//# sourceMappingURL=DatabricksTelemetryExporter.js.map

+1

dist/telemetry/DatabricksTelemetryExporter.js.map

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+61

dist/telemetry/FeatureFlagCache.d.ts

		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		import IClientContext from '../contracts/IClientContext';
		import IAuthentication from '../connection/contracts/IAuthentication';
		export interface FeatureFlagContext {
		telemetryEnabled?: boolean;
		lastFetched?: Date;
		refCount: number;
		cacheDuration: number;
		}
		/**
		* Per-host feature-flag cache used to gate telemetry emission. Responsibilities:
		* - dedupe in-flight fetches (thundering-herd protection);
		* - ref-count so context goes away when the last consumer closes;
		* - clamp server-provided TTL into a safe band.
		*
		* Shares HTTP plumbing (agent, user agent) with DatabricksTelemetryExporter.
		* Consumer wiring lands in a later PR in this stack (see PR description).
		*/
		export default class FeatureFlagCache {
		private context;
		private authProvider?;
		private contexts;
		private fetchPromises;
		private readonly userAgent;
		private readonly CACHE_DURATION_MS;
		private readonly MIN_CACHE_DURATION_S;
		private readonly MAX_CACHE_DURATION_S;
		private readonly FEATURE_FLAG_NAME;
		constructor(context: IClientContext, authProvider?: IAuthentication \| undefined);
		getOrCreateContext(host: string): FeatureFlagContext;
		releaseContext(host: string): void;
		isTelemetryEnabled(host: string): Promise<boolean>;
		/**
		* Strips the `-oss` suffix the feature-flag API does not accept. The server
		* keys off the SemVer triplet only, so anything appended would 404.
		*/
		private getDriverVersion;
		private fetchFeatureFlag;
		/**
		* Retries transient network errors once before giving up. Without a retry
		* a single hiccup would leave telemetry disabled for the full cache TTL
		* (15 min). One retry gives an ephemeral DNS / connection-reset failure
		* a second chance without pushing sustained load at a broken endpoint.
		*/
		private fetchWithRetry;
		private getAuthHeaders;
		}

+208

dist/telemetry/FeatureFlagCache.js

		"use strict";
		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		var __createBinding = (this && this.__createBinding) \|\| (Object.create ? (function(o, m, k, k2) {
		if (k2 === undefined) k2 = k;
		var desc = Object.getOwnPropertyDescriptor(m, k);
		if (!desc \|\| ("get" in desc ? !m.__esModule : desc.writable \|\| desc.configurable)) {
		desc = { enumerable: true, get: function() { return m[k]; } };
		}
		Object.defineProperty(o, k2, desc);
		}) : (function(o, m, k, k2) {
		if (k2 === undefined) k2 = k;
		o[k2] = m[k];
		}));
		var __setModuleDefault = (this && this.__setModuleDefault) \|\| (Object.create ? (function(o, v) {
		Object.defineProperty(o, "default", { enumerable: true, value: v });
		}) : function(o, v) {
		o["default"] = v;
		});
		var __importStar = (this && this.__importStar) \|\| function (mod) {
		if (mod && mod.__esModule) return mod;
		var result = {};
		if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
		__setModuleDefault(result, mod);
		return result;
		};
		var __importDefault = (this && this.__importDefault) \|\| function (mod) {
		return (mod && mod.__esModule) ? mod : { "default": mod };
		};
		Object.defineProperty(exports, "__esModule", { value: true });
		const node_fetch_1 = __importStar(require("node-fetch"));
		const IDBSQLLogger_1 = require("../contracts/IDBSQLLogger");
		const telemetryUtils_1 = require("./telemetryUtils");
		const buildUserAgentString_1 = __importDefault(require("../utils/buildUserAgentString"));
		const version_1 = __importDefault(require("../version"));
		/**
		* Per-host feature-flag cache used to gate telemetry emission. Responsibilities:
		* - dedupe in-flight fetches (thundering-herd protection);
		* - ref-count so context goes away when the last consumer closes;
		* - clamp server-provided TTL into a safe band.
		*
		* Shares HTTP plumbing (agent, user agent) with DatabricksTelemetryExporter.
		* Consumer wiring lands in a later PR in this stack (see PR description).
		*/
		class FeatureFlagCache {
		constructor(context, authProvider) {
		this.context = context;
		this.authProvider = authProvider;
		this.fetchPromises = new Map();
		this.CACHE_DURATION_MS = 15 * 60 * 1000;
		this.MIN_CACHE_DURATION_S = 60;
		this.MAX_CACHE_DURATION_S = 3600;
		this.FEATURE_FLAG_NAME = 'databricks.partnerplatform.clientConfigsFeatureFlags.enableTelemetryForNodeJs';
		this.contexts = new Map();
		this.userAgent = (0, buildUserAgentString_1.default)(this.context.getConfig().userAgentEntry);
		}
		getOrCreateContext(host) {
		let ctx = this.contexts.get(host);
		if (!ctx) {
		ctx = {
		refCount: 0,
		cacheDuration: this.CACHE_DURATION_MS,
		};
		this.contexts.set(host, ctx);
		}
		ctx.refCount += 1;
		return ctx;
		}
		releaseContext(host) {
		const ctx = this.contexts.get(host);
		if (ctx) {
		ctx.refCount -= 1;
		if (ctx.refCount <= 0) {
		this.contexts.delete(host);
		this.fetchPromises.delete(host);
		}
		}
		}
		async isTelemetryEnabled(host) {
		var _a;
		const logger = this.context.getLogger();
		const ctx = this.contexts.get(host);
		if (!ctx) {
		return false;
		}
		const isExpired = !ctx.lastFetched \|\| Date.now() - ctx.lastFetched.getTime() > ctx.cacheDuration;
		if (isExpired) {
		if (!this.fetchPromises.has(host)) {
		const fetchPromise = this.fetchFeatureFlag(host)
		.then((enabled) => {
		ctx.telemetryEnabled = enabled;
		ctx.lastFetched = new Date();
		return enabled;
		})
		.catch((error) => {
		var _a;
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Error fetching feature flag: ${error.message}`);
		return (_a = ctx.telemetryEnabled) !== null && _a !== void 0 ? _a : false;
		})
		.finally(() => {
		this.fetchPromises.delete(host);
		});
		this.fetchPromises.set(host, fetchPromise);
		}
		await this.fetchPromises.get(host);
		}
		return (_a = ctx.telemetryEnabled) !== null && _a !== void 0 ? _a : false;
		}
		/**
		* Strips the `-oss` suffix the feature-flag API does not accept. The server
		* keys off the SemVer triplet only, so anything appended would 404.
		*/
		getDriverVersion() {
		return version_1.default.replace(/-oss$/, '');
		}
		async fetchFeatureFlag(host) {
		const logger = this.context.getLogger();
		try {
		const endpoint = (0, telemetryUtils_1.buildTelemetryUrl)(host, `/api/2.0/connector-service/feature-flags/NODEJS/${this.getDriverVersion()}`);
		if (!endpoint) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Feature flag fetch skipped: invalid host ${host}`);
		return false;
		}
		const headers = {
		'Content-Type': 'application/json',
		'User-Agent': this.userAgent,
		...(await this.getAuthHeaders()),
		};
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Fetching feature flags from ${endpoint}`);
		const response = await this.fetchWithRetry(endpoint, {
		method: 'GET',
		headers,
		timeout: 10000,
		});
		if (!response.ok) {
		await response.text().catch(() => { });
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Feature flag fetch failed: ${response.status} ${response.statusText}`);
		return false;
		}
		const data = await response.json();
		if (data && data.flags && Array.isArray(data.flags)) {
		const ctx = this.contexts.get(host);
		if (ctx && typeof data.ttl_seconds === 'number' && data.ttl_seconds > 0) {
		const clampedTtl = Math.max(this.MIN_CACHE_DURATION_S, Math.min(this.MAX_CACHE_DURATION_S, data.ttl_seconds));
		ctx.cacheDuration = clampedTtl * 1000;
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Updated cache duration to ${clampedTtl} seconds`);
		}
		const flag = data.flags.find((f) => f.name === this.FEATURE_FLAG_NAME);
		if (flag) {
		const enabled = String(flag.value).toLowerCase() === 'true';
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Feature flag ${this.FEATURE_FLAG_NAME}: ${enabled}`);
		return enabled;
		}
		}
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Feature flag ${this.FEATURE_FLAG_NAME} not found in response`);
		return false;
		}
		catch (error) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Error fetching feature flag from ${host}: ${error.message}`);
		return false;
		}
		}
		/**
		* Retries transient network errors once before giving up. Without a retry
		* a single hiccup would leave telemetry disabled for the full cache TTL
		* (15 min). One retry gives an ephemeral DNS / connection-reset failure
		* a second chance without pushing sustained load at a broken endpoint.
		*/
		async fetchWithRetry(url, init) {
		const connectionProvider = await this.context.getConnectionProvider();
		const agent = await connectionProvider.getAgent();
		const retryPolicy = await connectionProvider.getRetryPolicy();
		const requestConfig = { agent, ...init };
		const result = await retryPolicy.invokeWithRetry(() => {
		const request = new node_fetch_1.Request(url, requestConfig);
		return (0, node_fetch_1.default)(request).then((response) => ({ request, response }));
		});
		return result.response;
		}
		async getAuthHeaders() {
		var _a;
		if (!this.authProvider) {
		return {};
		}
		try {
		return (0, telemetryUtils_1.normalizeHeaders)(await this.authProvider.authenticate());
		}
		catch (error) {
		this.context.getLogger().log(IDBSQLLogger_1.LogLevel.debug, `Feature flag auth failed: ${(_a = error === null \|\| error === void 0 ? void 0 : error.message) !== null && _a !== void 0 ? _a : error}`);
		return {};
		}
		}
		}
		exports.default = FeatureFlagCache;
		//# sourceMappingURL=FeatureFlagCache.js.map

+1

dist/telemetry/FeatureFlagCache.js.map

+72

dist/telemetry/MetricsAggregator.d.ts

		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		import IClientContext from '../contracts/IClientContext';
		import { TelemetryEvent } from './types';
		import DatabricksTelemetryExporter from './DatabricksTelemetryExporter';
		/**
		* Aggregates telemetry events by statement_id and manages batching/flushing.
		*
		* Overflow policy — when the pending buffer hits `maxPendingMetrics`, error
		* metrics are preserved preferentially over connection/statement metrics.
		* The first-failure error is usually the most valuable signal in post-mortem
		* debugging; dropping it FIFO would defeat the purpose of capture.
		*/
		export default class MetricsAggregator {
		private context;
		private exporter;
		private statementMetrics;
		private pendingMetrics;
		private flushTimer;
		private closed;
		private closing;
		private batchSize;
		private flushIntervalMs;
		private maxPendingMetrics;
		private maxErrorsPerStatement;
		private statementTtlMs;
		constructor(context: IClientContext, exporter: DatabricksTelemetryExporter);
		processEvent(event: TelemetryEvent): void;
		private processConnectionEvent;
		private processErrorEvent;
		private pushBoundedError;
		private processStatementEvent;
		private getOrCreateStatementDetails;
		/**
		* Drop entries older than `statementTtlMs`, emitting their buffered error
		* events as standalone metrics first so the first-failure signal survives
		* the eviction. Called from the periodic flush timer so idle clients
		* don't leak orphan entries.
		*/
		private evictExpiredStatements;
		completeStatement(statementId: string): void;
		/**
		* Append `metric` to the pending buffer, enforcing `maxPendingMetrics`.
		*
		* Overflow drops the oldest non-error entry (single `splice` — no new
		* allocation). Under an all-error buffer it falls back to dropping the
		* oldest entry at index 0.
		*/
		private addPendingMetric;
		private findDropIndex;
		/**
		* Drain the pending buffer and return a promise that resolves when the
		* exporter finishes with the drained batch. `close()` awaits this so
		* `process.exit()` after `client.close()` doesn't truncate the POST.
		*/
		flush(resetTimer?: boolean): Promise<void>;
		private startFlushTimer;
		close(): Promise<void>;
		}

+375

dist/telemetry/MetricsAggregator.js

		"use strict";
		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		Object.defineProperty(exports, "__esModule", { value: true });
		const IDBSQLLogger_1 = require("../contracts/IDBSQLLogger");
		const types_1 = require("./types");
		/**
		* Aggregates telemetry events by statement_id and manages batching/flushing.
		*
		* Overflow policy — when the pending buffer hits `maxPendingMetrics`, error
		* metrics are preserved preferentially over connection/statement metrics.
		* The first-failure error is usually the most valuable signal in post-mortem
		* debugging; dropping it FIFO would defeat the purpose of capture.
		*/
		class MetricsAggregator {
		constructor(context, exporter) {
		var _a, _b, _c, _d, _e;
		this.context = context;
		this.exporter = exporter;
		this.statementMetrics = new Map();
		this.pendingMetrics = [];
		this.flushTimer = null;
		this.closed = false;
		this.closing = false;
		try {
		const config = context.getConfig();
		this.batchSize = (_a = config.telemetryBatchSize) !== null && _a !== void 0 ? _a : types_1.DEFAULT_TELEMETRY_CONFIG.batchSize;
		this.flushIntervalMs = (_b = config.telemetryFlushIntervalMs) !== null && _b !== void 0 ? _b : types_1.DEFAULT_TELEMETRY_CONFIG.flushIntervalMs;
		this.maxPendingMetrics = (_c = config.telemetryMaxPendingMetrics) !== null && _c !== void 0 ? _c : types_1.DEFAULT_TELEMETRY_CONFIG.maxPendingMetrics;
		this.maxErrorsPerStatement =
		(_d = config.telemetryMaxErrorsPerStatement) !== null && _d !== void 0 ? _d : types_1.DEFAULT_TELEMETRY_CONFIG.maxErrorsPerStatement;
		this.statementTtlMs = (_e = config.telemetryStatementTtlMs) !== null && _e !== void 0 ? _e : types_1.DEFAULT_TELEMETRY_CONFIG.statementTtlMs;
		this.startFlushTimer();
		}
		catch (error) {
		const logger = this.context.getLogger();
		logger.log(IDBSQLLogger_1.LogLevel.debug, `MetricsAggregator constructor error: ${error.message}`);
		this.batchSize = types_1.DEFAULT_TELEMETRY_CONFIG.batchSize;
		this.flushIntervalMs = types_1.DEFAULT_TELEMETRY_CONFIG.flushIntervalMs;
		this.maxPendingMetrics = types_1.DEFAULT_TELEMETRY_CONFIG.maxPendingMetrics;
		this.maxErrorsPerStatement = types_1.DEFAULT_TELEMETRY_CONFIG.maxErrorsPerStatement;
		this.statementTtlMs = types_1.DEFAULT_TELEMETRY_CONFIG.statementTtlMs;
		}
		}
		processEvent(event) {
		if (this.closed)
		return;
		const logger = this.context.getLogger();
		try {
		if (event.eventType === types_1.TelemetryEventType.CONNECTION_OPEN) {
		this.processConnectionEvent(event);
		return;
		}
		if (event.eventType === types_1.TelemetryEventType.ERROR) {
		this.processErrorEvent(event);
		return;
		}
		if (event.statementId) {
		this.processStatementEvent(event);
		}
		}
		catch (error) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `MetricsAggregator.processEvent error: ${error.message}`);
		}
		}
		processConnectionEvent(event) {
		const metric = {
		metricType: 'connection',
		timestamp: event.timestamp,
		sessionId: event.sessionId,
		workspaceId: event.workspaceId,
		driverConfig: event.driverConfig,
		};
		this.addPendingMetric(metric);
		}
		processErrorEvent(event) {
		const logger = this.context.getLogger();
		// `isTerminal` is carried on the event by the emitter (it knows the
		// call site's taxonomy). If callers ever drop it we default to
		// retryable — buffering by statement is the safer choice.
		const isTerminal = event.isTerminal === true;
		if (isTerminal) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, 'Terminal error detected - flushing immediately');
		if (event.statementId && this.statementMetrics.has(event.statementId)) {
		const details = this.statementMetrics.get(event.statementId);
		this.pushBoundedError(details, event);
		this.completeStatement(event.statementId);
		}
		else {
		const metric = {
		metricType: 'error',
		timestamp: event.timestamp,
		sessionId: event.sessionId,
		statementId: event.statementId,
		workspaceId: event.workspaceId,
		errorName: event.errorName,
		errorMessage: event.errorMessage,
		errorStack: event.errorStack,
		};
		this.addPendingMetric(metric);
		}
		// Fire-and-forget on the terminal-error path so customer code doesn't
		// stall on telemetry HTTP. Do NOT reset the periodic flush timer:
		// under burst failures that would keep the tail-drain timer from
		// ever firing.
		Promise.resolve(this.flush(false)).catch((err) => {
		var _a;
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Terminal-error flush failed: ${(_a = err === null \|\| err === void 0 ? void 0 : err.message) !== null && _a !== void 0 ? _a : err}`);
		});
		}
		else if (event.statementId) {
		const details = this.getOrCreateStatementDetails(event);
		this.pushBoundedError(details, event);
		}
		}
		pushBoundedError(details, event) {
		if (details.errors.length >= this.maxErrorsPerStatement) {
		details.errors.shift();
		}
		details.errors.push(event);
		}
		processStatementEvent(event) {
		var _a, _b, _c, _d;
		const details = this.getOrCreateStatementDetails(event);
		switch (event.eventType) {
		case types_1.TelemetryEventType.STATEMENT_START:
		details.operationType = event.operationType;
		details.startTime = event.timestamp;
		break;
		case types_1.TelemetryEventType.STATEMENT_COMPLETE:
		details.executionLatencyMs = event.latencyMs;
		details.resultFormat = event.resultFormat;
		details.chunkCount = (_a = event.chunkCount) !== null && _a !== void 0 ? _a : 0;
		details.bytesDownloaded = (_b = event.bytesDownloaded) !== null && _b !== void 0 ? _b : 0;
		details.pollCount = (_c = event.pollCount) !== null && _c !== void 0 ? _c : 0;
		break;
		case types_1.TelemetryEventType.CLOUDFETCH_CHUNK:
		details.chunkCount += 1;
		details.bytesDownloaded += (_d = event.bytes) !== null && _d !== void 0 ? _d : 0;
		if (event.compressed !== undefined) {
		details.compressionEnabled = event.compressed;
		}
		break;
		default:
		break;
		}
		}
		getOrCreateStatementDetails(event) {
		const statementId = event.statementId;
		if (!this.statementMetrics.has(statementId)) {
		this.statementMetrics.set(statementId, {
		statementId,
		sessionId: event.sessionId,
		workspaceId: event.workspaceId,
		startTime: event.timestamp,
		chunkCount: 0,
		bytesDownloaded: 0,
		pollCount: 0,
		errors: [],
		});
		}
		return this.statementMetrics.get(statementId);
		}
		/**
		* Drop entries older than `statementTtlMs`, emitting their buffered error
		* events as standalone metrics first so the first-failure signal survives
		* the eviction. Called from the periodic flush timer so idle clients
		* don't leak orphan entries.
		*/
		evictExpiredStatements() {
		const cutoff = Date.now() - this.statementTtlMs;
		let evicted = 0;
		for (const [id, details] of this.statementMetrics) {
		if (details.startTime < cutoff) {
		for (const errorEvent of details.errors) {
		this.addPendingMetric({
		metricType: 'error',
		timestamp: errorEvent.timestamp,
		sessionId: details.sessionId,
		statementId: details.statementId,
		workspaceId: details.workspaceId,
		errorName: errorEvent.errorName,
		errorMessage: errorEvent.errorMessage,
		errorStack: errorEvent.errorStack,
		});
		}
		this.statementMetrics.delete(id);
		evicted += 1;
		}
		}
		if (evicted > 0) {
		this.context
		.getLogger()
		.log(IDBSQLLogger_1.LogLevel.debug, `Evicted ${evicted} abandoned statement(s) past ${this.statementTtlMs}ms TTL`);
		}
		}
		completeStatement(statementId) {
		if (this.closed)
		return;
		const logger = this.context.getLogger();
		try {
		const details = this.statementMetrics.get(statementId);
		if (!details) {
		return;
		}
		const metric = {
		metricType: 'statement',
		timestamp: details.startTime,
		sessionId: details.sessionId,
		statementId: details.statementId,
		workspaceId: details.workspaceId,
		latencyMs: details.executionLatencyMs,
		resultFormat: details.resultFormat,
		chunkCount: details.chunkCount,
		bytesDownloaded: details.bytesDownloaded,
		pollCount: details.pollCount,
		};
		this.addPendingMetric(metric);
		for (const errorEvent of details.errors) {
		const errorMetric = {
		metricType: 'error',
		timestamp: errorEvent.timestamp,
		sessionId: details.sessionId,
		statementId: details.statementId,
		workspaceId: details.workspaceId,
		errorName: errorEvent.errorName,
		errorMessage: errorEvent.errorMessage,
		errorStack: errorEvent.errorStack,
		};
		this.addPendingMetric(errorMetric);
		}
		this.statementMetrics.delete(statementId);
		}
		catch (error) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `MetricsAggregator.completeStatement error: ${error.message}`);
		}
		}
		/**
		* Append `metric` to the pending buffer, enforcing `maxPendingMetrics`.
		*
		* Overflow drops the oldest non-error entry (single `splice` — no new
		* allocation). Under an all-error buffer it falls back to dropping the
		* oldest entry at index 0.
		*/
		addPendingMetric(metric) {
		if (this.closed)
		return;
		this.pendingMetrics.push(metric);
		if (this.pendingMetrics.length > this.maxPendingMetrics) {
		const dropIndex = this.findDropIndex();
		this.pendingMetrics.splice(dropIndex, 1);
		const logger = this.context.getLogger();
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Dropped 1 oldest non-error telemetry metric (buffer full at ${this.maxPendingMetrics})`);
		}
		if (this.pendingMetrics.length >= this.batchSize && !this.closing) {
		// resetTimer=false so the periodic tail-drain keeps its cadence even
		// under sustained batch-size bursts.
		const logger = this.context.getLogger();
		Promise.resolve(this.flush(false)).catch((err) => {
		var _a;
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Batch-trigger flush failed: ${(_a = err === null \|\| err === void 0 ? void 0 : err.message) !== null && _a !== void 0 ? _a : err}`);
		});
		}
		}
		findDropIndex() {
		for (let i = 0; i < this.pendingMetrics.length; i += 1) {
		if (this.pendingMetrics[i].metricType !== 'error') {
		return i;
		}
		}
		return 0;
		}
		/**
		* Drain the pending buffer and return a promise that resolves when the
		* exporter finishes with the drained batch. `close()` awaits this so
		* `process.exit()` after `client.close()` doesn't truncate the POST.
		*/
		async flush(resetTimer = true) {
		var _a;
		const logger = this.context.getLogger();
		let exportPromise = null;
		try {
		if (this.pendingMetrics.length === 0) {
		if (resetTimer && !this.closed) {
		this.startFlushTimer();
		}
		return;
		}
		const metricsToExport = this.pendingMetrics;
		this.pendingMetrics = [];
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Flushing ${metricsToExport.length} telemetry metrics`);
		exportPromise = this.exporter.export(metricsToExport);
		if (resetTimer && !this.closed) {
		this.startFlushTimer();
		}
		}
		catch (error) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `MetricsAggregator.flush error: ${error.message}`);
		}
		if (exportPromise) {
		try {
		await exportPromise;
		}
		catch (err) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Unexpected export error: ${(_a = err === null \|\| err === void 0 ? void 0 : err.message) !== null && _a !== void 0 ? _a : err}`);
		}
		}
		}
		startFlushTimer() {
		if (this.closed)
		return;
		const logger = this.context.getLogger();
		try {
		if (this.flushTimer) {
		clearInterval(this.flushTimer);
		}
		this.flushTimer = setInterval(() => {
		var _a;
		// Idle eviction: run before the flush so orphan-error metrics have
		// a chance to batch into this drain rather than wait for the next.
		try {
		this.evictExpiredStatements();
		}
		catch (err) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `evictExpiredStatements error: ${(_a = err === null \|\| err === void 0 ? void 0 : err.message) !== null && _a !== void 0 ? _a : err}`);
		}
		Promise.resolve(this.flush(false)).catch((err) => {
		var _a;
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Periodic flush failed: ${(_a = err === null \|\| err === void 0 ? void 0 : err.message) !== null && _a !== void 0 ? _a : err}`);
		});
		}, this.flushIntervalMs);
		this.flushTimer.unref();
		}
		catch (error) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `MetricsAggregator.startFlushTimer error: ${error.message}`);
		}
		}
		async close() {
		const logger = this.context.getLogger();
		try {
		// Suppress batch-triggered fire-and-forget flushes from addPendingMetric
		// so no promises escape past the single awaited flush below.
		this.closing = true;
		if (this.flushTimer) {
		clearInterval(this.flushTimer);
		this.flushTimer = null;
		}
		// closed is still false here so completeStatement → addPendingMetric works normally.
		const remainingStatements = [...this.statementMetrics.keys()];
		for (const statementId of remainingStatements) {
		this.completeStatement(statementId);
		}
		this.closed = true;
		await this.flush(false);
		}
		catch (error) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `MetricsAggregator.close error: ${error.message}`);
		}
		}
		}
		exports.default = MetricsAggregator;
		//# sourceMappingURL=MetricsAggregator.js.map

+1

dist/telemetry/MetricsAggregator.js.map

+41

dist/telemetry/TelemetryClient.d.ts

		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		import IClientContext from '../contracts/IClientContext';
		/**
		* Telemetry client for a specific host.
		* Managed by TelemetryClientProvider with reference counting.
		* One client instance is shared across all connections to the same host.
		*/
		declare class TelemetryClient {
		private context;
		private host;
		private closed;
		constructor(context: IClientContext, host: string);
		/**
		* Gets the host associated with this client.
		*/
		getHost(): string;
		/**
		* Checks if the client has been closed.
		*/
		isClosed(): boolean;
		/**
		* Closes the telemetry client and releases resources.
		* Should only be called by TelemetryClientProvider when reference count reaches zero.
		*/
		close(): void;
		}
		export default TelemetryClient;

+64

dist/telemetry/TelemetryClient.js

		"use strict";
		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		Object.defineProperty(exports, "__esModule", { value: true });
		const IDBSQLLogger_1 = require("../contracts/IDBSQLLogger");
		/**
		* Telemetry client for a specific host.
		* Managed by TelemetryClientProvider with reference counting.
		* One client instance is shared across all connections to the same host.
		*/
		class TelemetryClient {
		constructor(context, host) {
		this.context = context;
		this.host = host;
		this.closed = false;
		const logger = context.getLogger();
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Created TelemetryClient for host: ${host}`);
		}
		/**
		* Gets the host associated with this client.
		*/
		getHost() {
		return this.host;
		}
		/**
		* Checks if the client has been closed.
		*/
		isClosed() {
		return this.closed;
		}
		/**
		* Closes the telemetry client and releases resources.
		* Should only be called by TelemetryClientProvider when reference count reaches zero.
		*/
		close() {
		if (this.closed) {
		return;
		}
		try {
		this.context.getLogger().log(IDBSQLLogger_1.LogLevel.debug, `Closing TelemetryClient for host: ${this.host}`);
		}
		catch (_a) {
		// swallow
		}
		finally {
		this.closed = true;
		}
		}
		}
		exports.default = TelemetryClient;
		//# sourceMappingURL=TelemetryClient.js.map

+1

dist/telemetry/TelemetryClient.js.map

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+67

dist/telemetry/TelemetryClientProvider.d.ts

		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		import IClientContext from '../contracts/IClientContext';
		import TelemetryClient from './TelemetryClient';
		/**
		* Manages one telemetry client per host.
		* Prevents rate limiting by sharing clients across connections to the same host.
		* Instance-based (not singleton), stored in DBSQLClient.
		*
		* Reference counts are incremented and decremented synchronously, and
		* `close()` is sync today, so there is no await between map mutation and
		* client teardown. The map entry is removed before `close()` runs so a
		* concurrent `getOrCreateClient` call for the same host gets a fresh
		* instance rather than receiving this closing one. When `close()` becomes
		* async (e.g. HTTP flush in [5/7]) the flow will need to `await` after the
		* delete to preserve the same invariant.
		*/
		declare class TelemetryClientProvider {
		private context;
		private clients;
		private softLimitWarned;
		constructor(context: IClientContext);
		/**
		* Canonicalize host so aliases (scheme, default port, trailing slash, case,
		* trailing dot, surrounding whitespace) map to the same entry. Kept to a
		* lightweight lexical normalization — `buildTelemetryUrl` still performs
		* the strict security validation when a request is actually built.
		*/
		private static normalizeHostKey;
		/**
		* Gets or creates a telemetry client for the specified host.
		* Increments the reference count for the client.
		*
		* @param host The host identifier (e.g., "workspace.cloud.databricks.com")
		* @returns The telemetry client for the host
		*/
		getOrCreateClient(host: string): TelemetryClient;
		/**
		* Releases a telemetry client for the specified host.
		* Decrements the reference count and closes the client when it reaches zero.
		*
		* @param host The host identifier
		*/
		releaseClient(host: string): void;
		/**
		* @internal Exposed for testing only.
		*/
		getRefCount(host: string): number;
		/**
		* @internal Exposed for testing only.
		*/
		getActiveClients(): Map<string, TelemetryClient>;
		}
		export default TelemetryClientProvider;

+148

dist/telemetry/TelemetryClientProvider.js

		"use strict";
		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		var __importDefault = (this && this.__importDefault) \|\| function (mod) {
		return (mod && mod.__esModule) ? mod : { "default": mod };
		};
		Object.defineProperty(exports, "__esModule", { value: true });
		const IDBSQLLogger_1 = require("../contracts/IDBSQLLogger");
		const TelemetryClient_1 = __importDefault(require("./TelemetryClient"));
		// Soft cap on distinct host entries. Above this the provider warns once so a
		// misconfigured caller (per-request hosts, unnormalized aliases) is visible in
		// logs rather than silently growing the map.
		const MAX_CLIENTS_SOFT_LIMIT = 128;
		/**
		* Manages one telemetry client per host.
		* Prevents rate limiting by sharing clients across connections to the same host.
		* Instance-based (not singleton), stored in DBSQLClient.
		*
		* Reference counts are incremented and decremented synchronously, and
		* `close()` is sync today, so there is no await between map mutation and
		* client teardown. The map entry is removed before `close()` runs so a
		* concurrent `getOrCreateClient` call for the same host gets a fresh
		* instance rather than receiving this closing one. When `close()` becomes
		* async (e.g. HTTP flush in [5/7]) the flow will need to `await` after the
		* delete to preserve the same invariant.
		*/
		class TelemetryClientProvider {
		constructor(context) {
		this.context = context;
		this.softLimitWarned = false;
		this.clients = new Map();
		const logger = context.getLogger();
		logger.log(IDBSQLLogger_1.LogLevel.debug, 'Created TelemetryClientProvider');
		}
		/**
		* Canonicalize host so aliases (scheme, default port, trailing slash, case,
		* trailing dot, surrounding whitespace) map to the same entry. Kept to a
		* lightweight lexical normalization — `buildTelemetryUrl` still performs
		* the strict security validation when a request is actually built.
		*/
		static normalizeHostKey(host) {
		return host
		.trim()
		.toLowerCase()
		.replace(/^https?:\/\//, '')
		.replace(/\/+$/, '')
		.replace(/\.$/, '')
		.replace(/:443$/, '');
		}
		/**
		* Gets or creates a telemetry client for the specified host.
		* Increments the reference count for the client.
		*
		* @param host The host identifier (e.g., "workspace.cloud.databricks.com")
		* @returns The telemetry client for the host
		*/
		getOrCreateClient(host) {
		const logger = this.context.getLogger();
		const key = TelemetryClientProvider.normalizeHostKey(host);
		let holder = this.clients.get(key);
		if (!holder) {
		const client = new TelemetryClient_1.default(this.context, key);
		holder = {
		client,
		refCount: 0,
		};
		this.clients.set(key, holder);
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Created new TelemetryClient for host: ${host}`);
		if (!this.softLimitWarned && this.clients.size > MAX_CLIENTS_SOFT_LIMIT) {
		this.softLimitWarned = true;
		logger.log(IDBSQLLogger_1.LogLevel.warn, `TelemetryClientProvider has ${this.clients.size} distinct hosts — possible alias or leak`);
		}
		}
		holder.refCount += 1;
		logger.log(IDBSQLLogger_1.LogLevel.debug, `TelemetryClient reference count for ${host}: ${holder.refCount}`);
		return holder.client;
		}
		/**
		* Releases a telemetry client for the specified host.
		* Decrements the reference count and closes the client when it reaches zero.
		*
		* @param host The host identifier
		*/
		releaseClient(host) {
		const logger = this.context.getLogger();
		const key = TelemetryClientProvider.normalizeHostKey(host);
		const holder = this.clients.get(key);
		if (!holder) {
		logger.log(IDBSQLLogger_1.LogLevel.debug, `No TelemetryClient found for host: ${host}`);
		return;
		}
		// Guard against double-release: a caller releasing more times than it got
		// would otherwise drive refCount negative and close a client another
		// caller is still holding. Warn loudly and refuse to decrement further.
		if (holder.refCount <= 0) {
		logger.log(IDBSQLLogger_1.LogLevel.warn, `Unbalanced release for TelemetryClient host: ${host}`);
		return;
		}
		holder.refCount -= 1;
		logger.log(IDBSQLLogger_1.LogLevel.debug, `TelemetryClient reference count for ${host}: ${holder.refCount}`);
		// Close and remove client when reference count reaches zero.
		// Remove from map before calling close so a concurrent getOrCreateClient
		// creates a fresh client rather than receiving this closing one.
		if (holder.refCount <= 0) {
		this.clients.delete(key);
		try {
		holder.client.close();
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Closed and removed TelemetryClient for host: ${host}`);
		}
		catch (error) {
		const msg = error instanceof Error ? error.message : String(error);
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Error releasing TelemetryClient: ${msg}`);
		}
		}
		}
		/**
		* @internal Exposed for testing only.
		*/
		getRefCount(host) {
		const holder = this.clients.get(TelemetryClientProvider.normalizeHostKey(host));
		return holder ? holder.refCount : 0;
		}
		/**
		* @internal Exposed for testing only.
		*/
		getActiveClients() {
		const result = new Map();
		for (const [host, holder] of this.clients.entries()) {
		result.set(host, holder.client);
		}
		return result;
		}
		}
		exports.default = TelemetryClientProvider;
		//# sourceMappingURL=TelemetryClientProvider.js.map

+1

dist/telemetry/TelemetryClientProvider.js.map

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+93

dist/telemetry/TelemetryEventEmitter.d.ts

		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		/// <reference types="node" />
		import { EventEmitter } from 'events';
		import IClientContext from '../contracts/IClientContext';
		import { DriverConfiguration } from './types';
		/**
		* EventEmitter for driver telemetry.
		* Emits events at key driver operations.
		*
		* CRITICAL REQUIREMENT: ALL exceptions must be caught and logged at LogLevel.debug ONLY
		* (never warn/error) to avoid customer anxiety. NO console logging allowed - only IDBSQLLogger.
		*
		* All emit methods are wrapped in try-catch blocks that swallow exceptions completely.
		* Event emission respects the telemetryEnabled flag from context config.
		*/
		export default class TelemetryEventEmitter extends EventEmitter {
		private context;
		private enabled;
		constructor(context: IClientContext);
		/**
		* Emit a connection open event.
		*
		* @param data Connection event data including sessionId, workspaceId, and driverConfig
		*/
		emitConnectionOpen(data: {
		sessionId: string;
		workspaceId: string;
		driverConfig: DriverConfiguration;
		}): void;
		/**
		* Emit a statement start event.
		*
		* @param data Statement start data including statementId, sessionId, and operationType
		*/
		emitStatementStart(data: {
		statementId: string;
		sessionId: string;
		operationType?: string;
		}): void;
		/**
		* Emit a statement complete event.
		*
		* @param data Statement completion data including latency, result format, and metrics
		*/
		emitStatementComplete(data: {
		statementId: string;
		sessionId: string;
		latencyMs?: number;
		resultFormat?: string;
		chunkCount?: number;
		bytesDownloaded?: number;
		pollCount?: number;
		}): void;
		/**
		* Emit a CloudFetch chunk download event.
		*
		* @param data CloudFetch chunk data including chunk index, latency, bytes, and compression
		*/
		emitCloudFetchChunk(data: {
		statementId: string;
		chunkIndex: number;
		latencyMs?: number;
		bytes: number;
		compressed?: boolean;
		}): void;
		/**
		* Emit an error event.
		*
		* @param data Error event data including error details and terminal status
		*/
		emitError(data: {
		statementId?: string;
		sessionId?: string;
		errorName: string;
		errorMessage: string;
		errorStack?: string;
		isTerminal: boolean;
		}): void;
		}

+172

dist/telemetry/TelemetryEventEmitter.js

		"use strict";
		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		Object.defineProperty(exports, "__esModule", { value: true });
		const events_1 = require("events");
		const IDBSQLLogger_1 = require("../contracts/IDBSQLLogger");
		const types_1 = require("./types");
		/**
		* EventEmitter for driver telemetry.
		* Emits events at key driver operations.
		*
		* CRITICAL REQUIREMENT: ALL exceptions must be caught and logged at LogLevel.debug ONLY
		* (never warn/error) to avoid customer anxiety. NO console logging allowed - only IDBSQLLogger.
		*
		* All emit methods are wrapped in try-catch blocks that swallow exceptions completely.
		* Event emission respects the telemetryEnabled flag from context config.
		*/
		class TelemetryEventEmitter extends events_1.EventEmitter {
		constructor(context) {
		var _a;
		super();
		this.context = context;
		// Check if telemetry is enabled from config
		// Default to false for safe rollout
		const config = context.getConfig();
		this.enabled = (_a = config.telemetryEnabled) !== null && _a !== void 0 ? _a : false;
		}
		/**
		* Emit a connection open event.
		*
		* @param data Connection event data including sessionId, workspaceId, and driverConfig
		*/
		emitConnectionOpen(data) {
		if (!this.enabled)
		return;
		const logger = this.context.getLogger();
		try {
		const event = {
		eventType: types_1.TelemetryEventType.CONNECTION_OPEN,
		timestamp: Date.now(),
		sessionId: data.sessionId,
		workspaceId: data.workspaceId,
		driverConfig: data.driverConfig,
		};
		this.emit(types_1.TelemetryEventType.CONNECTION_OPEN, event);
		}
		catch (error) {
		// Swallow all exceptions - log at debug level only
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Error emitting connection event: ${error.message}`);
		}
		}
		/**
		* Emit a statement start event.
		*
		* @param data Statement start data including statementId, sessionId, and operationType
		*/
		emitStatementStart(data) {
		if (!this.enabled)
		return;
		const logger = this.context.getLogger();
		try {
		const event = {
		eventType: types_1.TelemetryEventType.STATEMENT_START,
		timestamp: Date.now(),
		statementId: data.statementId,
		sessionId: data.sessionId,
		operationType: data.operationType,
		};
		this.emit(types_1.TelemetryEventType.STATEMENT_START, event);
		}
		catch (error) {
		// Swallow all exceptions - log at debug level only
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Error emitting statement start: ${error.message}`);
		}
		}
		/**
		* Emit a statement complete event.
		*
		* @param data Statement completion data including latency, result format, and metrics
		*/
		emitStatementComplete(data) {
		if (!this.enabled)
		return;
		const logger = this.context.getLogger();
		try {
		const event = {
		eventType: types_1.TelemetryEventType.STATEMENT_COMPLETE,
		timestamp: Date.now(),
		statementId: data.statementId,
		sessionId: data.sessionId,
		latencyMs: data.latencyMs,
		resultFormat: data.resultFormat,
		chunkCount: data.chunkCount,
		bytesDownloaded: data.bytesDownloaded,
		pollCount: data.pollCount,
		};
		this.emit(types_1.TelemetryEventType.STATEMENT_COMPLETE, event);
		}
		catch (error) {
		// Swallow all exceptions - log at debug level only
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Error emitting statement complete: ${error.message}`);
		}
		}
		/**
		* Emit a CloudFetch chunk download event.
		*
		* @param data CloudFetch chunk data including chunk index, latency, bytes, and compression
		*/
		emitCloudFetchChunk(data) {
		if (!this.enabled)
		return;
		const logger = this.context.getLogger();
		try {
		const event = {
		eventType: types_1.TelemetryEventType.CLOUDFETCH_CHUNK,
		timestamp: Date.now(),
		statementId: data.statementId,
		chunkIndex: data.chunkIndex,
		latencyMs: data.latencyMs,
		bytes: data.bytes,
		compressed: data.compressed,
		};
		this.emit(types_1.TelemetryEventType.CLOUDFETCH_CHUNK, event);
		}
		catch (error) {
		// Swallow all exceptions - log at debug level only
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Error emitting cloudfetch chunk: ${error.message}`);
		}
		}
		/**
		* Emit an error event.
		*
		* @param data Error event data including error details and terminal status
		*/
		emitError(data) {
		if (!this.enabled)
		return;
		const logger = this.context.getLogger();
		try {
		const event = {
		eventType: types_1.TelemetryEventType.ERROR,
		timestamp: Date.now(),
		statementId: data.statementId,
		sessionId: data.sessionId,
		errorName: data.errorName,
		errorMessage: data.errorMessage,
		errorStack: data.errorStack,
		isTerminal: data.isTerminal,
		};
		this.emit(types_1.TelemetryEventType.ERROR, event);
		}
		catch (error) {
		// Swallow all exceptions - log at debug level only
		logger.log(IDBSQLLogger_1.LogLevel.debug, `Error emitting error event: ${error.message}`);
		}
		}
		}
		exports.default = TelemetryEventEmitter;
		//# sourceMappingURL=TelemetryEventEmitter.js.map

+1

dist/telemetry/TelemetryEventEmitter.js.map

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+56

dist/telemetry/telemetryUtils.d.ts

		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		/**
		* Build an HTTPS telemetry URL from a host and a path.
		*
		* Refuses anything beyond a bare `host[:port]` so a compromised or mistyped
		* host cannot redirect the authenticated request to an attacker-controlled
		* endpoint. Defeated historical bypasses include:
		* - protocol-relative prefix: `//attacker.com`
		* - zero-width / ASCII whitespace in the host
		* - userinfo (`user:pass@host`)
		* - path/query/fragment
		* - CRLF (header injection on some fetch backends)
		* - loopback / link-local / RFC1918 / cloud-metadata addresses
		*
		* Returns `null` when the host fails any check; callers drop the batch.
		*/
		export declare function buildTelemetryUrl(host: string, path: string): string \| null;
		/**
		* Strips common secret shapes from a free-form error string and caps length.
		* Applied before anything is shipped off-box. Redaction happens before
		* truncation so a long stack cannot bury a secret past the cap; truncation
		* then runs a second pass to catch anything that appeared only in the tail.
		*/
		export declare function redactSensitive(value: string \| undefined, maxLen?: number): string;
		/**
		* Normalises any `HeadersInit` shape (`Headers`, `[string,string][]`, or
		* `Record<string, string>`) into a plain string dictionary. Non-string
		* values are dropped. Shared by the exporter and FeatureFlagCache so there
		* is one source of truth for auth-header handling.
		*/
		export declare function normalizeHeaders(raw: unknown): Record<string, string>;
		/**
		* Case-insensitive check for a non-empty `Authorization` header.
		*/
		export declare function hasAuthorization(headers: Record<string, string>): boolean;
		/**
		* Returns a safe `process_name` value: the basename of the first whitespace-
		* delimited token, with trailing whitespace trimmed. This defeats both the
		* absolute-path PII leak (`/home/<user>/app.js`) and the argv-leak shape
		* (`node --db-password=X app.js`) that some producers pass in.
		*/
		export declare function sanitizeProcessName(name: string \| undefined): string;

+222

dist/telemetry/telemetryUtils.js

		"use strict";
		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		Object.defineProperty(exports, "__esModule", { value: true });
		exports.sanitizeProcessName = exports.hasAuthorization = exports.normalizeHeaders = exports.redactSensitive = exports.buildTelemetryUrl = void 0;
		/**
		* Hosts we always refuse to send authenticated telemetry to. Targeted at the
		* `/api/2.0/sql/telemetry-ext` exfil vector: an attacker-influenced `host`
		* (env var, tampered config, etc.) must not be able to redirect the Bearer
		* token to a loopback/IMDS/RFC1918 endpoint.
		*/
		const BLOCKED_HOST_PATTERNS = [
		/^(?:127\.\|0\.\|10\.\|169\.254\.\|172\.(?:1[6-9]\|2[0-9]\|3[01])\.\|192\.168\.)/,
		/^(?:localhost\|metadata\.google\.internal\|metadata\.azure\.com)$/i,
		/^\[?::1\]?$/,
		/^\[?(?:fc\|fd)[0-9a-f]{2}:/i,
		/^\[?::ffff:(?:127\|10\|0\|169\.254)\./i,
		];
		/**
		* Build an HTTPS telemetry URL from a host and a path.
		*
		* Refuses anything beyond a bare `host[:port]` so a compromised or mistyped
		* host cannot redirect the authenticated request to an attacker-controlled
		* endpoint. Defeated historical bypasses include:
		* - protocol-relative prefix: `//attacker.com`
		* - zero-width / ASCII whitespace in the host
		* - userinfo (`user:pass@host`)
		* - path/query/fragment
		* - CRLF (header injection on some fetch backends)
		* - loopback / link-local / RFC1918 / cloud-metadata addresses
		*
		* Returns `null` when the host fails any check; callers drop the batch.
		*/
		function buildTelemetryUrl(host, path) {
		if (typeof host !== 'string' \|\| host.length === 0) {
		return null;
		}
		// Reject ASCII whitespace + common zero-width/BOM codepoints that JS `\s`
		// does not cover but `new URL` silently strips.
		if (/[\s\u200b-\u200f\u2060\ufeff]/.test(host)) {
		return null;
		}
		const cleanHost = host.replace(/^https?:\/\//, '').replace(/\/+$/, '');
		if (cleanHost.length === 0) {
		return null;
		}
		// Reject anything that looks like userinfo / path / protocol-relative
		// prefix before URL parsing. `new URL('https://' + '//x')` would otherwise
		// normalise the doubled slash and accept `x` as the host.
		if (/[/\\@]/.test(cleanHost)) {
		return null;
		}
		let parsed;
		try {
		parsed = new URL(`https://${cleanHost}`);
		}
		catch (_a) {
		return null;
		}
		if (parsed.pathname !== '/' \|\|
		parsed.search !== '' \|\|
		parsed.hash !== '' \|\|
		parsed.username !== '' \|\|
		parsed.password !== '') {
		return null;
		}
		// Defence in depth: ensure `new URL` did not silently rewrite the host we
		// validated (e.g. by stripping a codepoint we missed above). `new URL`
		// normalises away the default :443 for https, so compare using the
		// port-stripped hostname instead of .host.
		const expectedHost = cleanHost.toLowerCase().replace(/:443$/, '');
		const actualHost = parsed.host.toLowerCase().replace(/:443$/, '');
		if (actualHost !== expectedHost) {
		return null;
		}
		if (BLOCKED_HOST_PATTERNS.some((r) => r.test(parsed.hostname))) {
		return null;
		}
		return `https://${parsed.host}${path}`;
		}
		exports.buildTelemetryUrl = buildTelemetryUrl;
		/**
		* Prefixes the Databricks driver uses for internal token formats. Kept in
		* sync with `lib/utils/buildUserAgentString.ts`'s `redactInternalToken`.
		* Extending one list should extend the other.
		*/
		const DATABRICKS_TOKEN_PREFIXES = ['dkea', 'dskea', 'dapi', 'dsapi', 'dose'];
		const SECRET_PATTERNS = [
		// `Authorization: Bearer <token>` / `Bearer <token>` anywhere in a stack.
		[/Bearer\s+[A-Za-z0-9._\-+/=]+/gi, 'Bearer <REDACTED>'],
		// `Authorization: Basic <base64>`.
		[/Basic\s+[A-Za-z0-9+/=]+/gi, 'Basic <REDACTED>'],
		// URL userinfo: `https://user:pass@host/…`.
		[/([a-z][a-z0-9+.-]*:\/\/)[^/\s:@]+:[^/\s@]+@/gi, '$1<REDACTED>@'],
		// Databricks PATs / service-token prefixes without `Bearer`, e.g.
		// `token is dapi0123…` — appears in error stacks that echo the raw value.
		[new RegExp(`\\b(?:${DATABRICKS_TOKEN_PREFIXES.join('\|')})[A-Za-z0-9]{8,}`, 'g'), '<REDACTED>'],
		// JWTs (three base64url segments separated by dots).
		[/\beyJ[A-Za-z0-9_-]{10,}\.[A-Za-z0-9_-]{10,}\.[A-Za-z0-9_-]{10,}\b/g, '<REDACTED_JWT>'],
		// JSON-encoded secrets: `"client_secret":"..."`, `"access_token":"..."` etc.
		[
		/"(password\|token\|client_secret\|refresh_token\|access_token\|id_token\|secret\|api[_-]?key\|apikey)"\s:\s"[^"]*"/gi,
		'"$1":"<REDACTED>"',
		],
		// Form-URL-encoded / key=value secrets.
		[
		/\b(token\|password\|client_secret\|refresh_token\|access_token\|id_token\|secret\|api[_-]?key\|apikey)=[^\s&"']+/gi,
		'$1=<REDACTED>',
		],
		];
		/**
		* Strips common secret shapes from a free-form error string and caps length.
		* Applied before anything is shipped off-box. Redaction happens before
		* truncation so a long stack cannot bury a secret past the cap; truncation
		* then runs a second pass to catch anything that appeared only in the tail.
		*/
		function redactSensitive(value, maxLen = 2048) {
		if (!value) {
		return '';
		}
		let redacted = value;
		for (const [pattern, replacement] of SECRET_PATTERNS) {
		redacted = redacted.replace(pattern, replacement);
		}
		if (redacted.length > maxLen) {
		redacted = `${redacted.slice(0, maxLen)}…[truncated]`;
		for (const [pattern, replacement] of SECRET_PATTERNS) {
		redacted = redacted.replace(pattern, replacement);
		}
		}
		return redacted;
		}
		exports.redactSensitive = redactSensitive;
		/**
		* Normalises any `HeadersInit` shape (`Headers`, `[string,string][]`, or
		* `Record<string, string>`) into a plain string dictionary. Non-string
		* values are dropped. Shared by the exporter and FeatureFlagCache so there
		* is one source of truth for auth-header handling.
		*/
		function normalizeHeaders(raw) {
		if (!raw \|\| typeof raw !== 'object') {
		return {};
		}
		// Avoid importing node-fetch here; use structural check.
		if (typeof raw.forEach === 'function' && !Array.isArray(raw)) {
		const out = {};
		raw.forEach((value, key) => {
		if (typeof key === 'string' && typeof value === 'string') {
		out[key] = value;
		}
		});
		return out;
		}
		if (Array.isArray(raw)) {
		const out = {};
		for (const entry of raw) {
		if (Array.isArray(entry) && entry.length === 2 && typeof entry[0] === 'string' && typeof entry[1] === 'string') {
		const [key, value] = entry;
		out[key] = value;
		}
		}
		return out;
		}
		const out = {};
		for (const [k, v] of Object.entries(raw)) {
		if (typeof v === 'string') {
		out[k] = v;
		}
		}
		return out;
		}
		exports.normalizeHeaders = normalizeHeaders;
		/**
		* Case-insensitive check for a non-empty `Authorization` header.
		*/
		function hasAuthorization(headers) {
		for (const key of Object.keys(headers)) {
		if (key.toLowerCase() === 'authorization' && headers[key]) {
		return true;
		}
		}
		return false;
		}
		exports.hasAuthorization = hasAuthorization;
		/**
		* Returns a safe `process_name` value: the basename of the first whitespace-
		* delimited token, with trailing whitespace trimmed. This defeats both the
		* absolute-path PII leak (`/home/<user>/app.js`) and the argv-leak shape
		* (`node --db-password=X app.js`) that some producers pass in.
		*/
		function sanitizeProcessName(name) {
		if (!name) {
		return '';
		}
		const trimmed = name.trim();
		if (trimmed.length === 0) {
		return '';
		}
		// Drop argv tail: anything after the first whitespace — argv[0] shouldn't
		// contain spaces, but producers sometimes pass `argv.join(' ')`.
		const firstToken = trimmed.split(/\s/, 1)[0];
		if (!firstToken) {
		return '';
		}
		const lastSep = Math.max(firstToken.lastIndexOf('/'), firstToken.lastIndexOf('\\'));
		return lastSep < 0 ? firstToken : firstToken.slice(lastSep + 1);
		}
		exports.sanitizeProcessName = sanitizeProcessName;
		//# sourceMappingURL=telemetryUtils.js.map

+1

dist/telemetry/telemetryUtils.js.map

+22

dist/telemetry/urlUtils.d.ts

		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		/**
		* Build full URL from host and path, handling protocol correctly.
		* @param host The hostname (with or without protocol)
		* @param path The path to append (should start with /)
		* @returns Full URL with protocol
		*/
		export declare function buildUrl(host: string, path: string): string;

+35

dist/telemetry/urlUtils.js

		"use strict";
		/**
		* Copyright (c) 2025 Databricks Contributors
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/
		Object.defineProperty(exports, "__esModule", { value: true });
		exports.buildUrl = void 0;
		/**
		* Build full URL from host and path, handling protocol correctly.
		* @param host The hostname (with or without protocol)
		* @param path The path to append (should start with /)
		* @returns Full URL with protocol
		*/
		// eslint-disable-next-line import/prefer-default-export
		function buildUrl(host, path) {
		// Check if host already has protocol
		if (host.startsWith('http://') \|\| host.startsWith('https://')) {
		return `${host}${path}`;
		}
		// Add https:// if no protocol present
		return `https://${host}${path}`;
		}
		exports.buildUrl = buildUrl;
		//# sourceMappingURL=urlUtils.js.map

+1

dist/telemetry/urlUtils.js.map

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+20

dist/utils/agentDetector.d.ts

		/**
		* Detects whether the Node.js SQL driver is being invoked by an AI coding agent
		* by checking for well-known environment variables that agents set in their
		* spawned shell processes.
		*
		* Detection only succeeds when exactly one agent environment variable is present,
		* to avoid ambiguous attribution when multiple agent environments overlap.
		*
		* Adding a new agent requires only a new entry in `knownAgents`.
		*
		* References for each environment variable:
		* - ANTIGRAVITY_AGENT: Closed source. Google Antigravity sets this variable.
		* - CLAUDECODE: https://github.com/anthropics/claude-code (sets CLAUDECODE=1)
		* - CLINE_ACTIVE: https://github.com/cline/cline (shipped in v3.24.0)
		* - CODEX_CI: https://github.com/openai/codex (part of UNIFIED_EXEC_ENV array in codex-rs)
		* - CURSOR_AGENT: Closed source. Referenced in a gist by johnlindquist.
		* - GEMINI_CLI: https://google-gemini.github.io/gemini-cli/docs/tools/shell.html (sets GEMINI_CLI=1)
		* - OPENCODE: https://github.com/opencode-ai/opencode (sets OPENCODE=1)
		*/
		export default function detectAgent(env?: Record<string, string \| undefined>): string;

+39

dist/utils/agentDetector.js

		"use strict";
		/**
		* Detects whether the Node.js SQL driver is being invoked by an AI coding agent
		* by checking for well-known environment variables that agents set in their
		* spawned shell processes.
		*
		* Detection only succeeds when exactly one agent environment variable is present,
		* to avoid ambiguous attribution when multiple agent environments overlap.
		*
		* Adding a new agent requires only a new entry in `knownAgents`.
		*
		* References for each environment variable:
		* - ANTIGRAVITY_AGENT: Closed source. Google Antigravity sets this variable.
		* - CLAUDECODE: https://github.com/anthropics/claude-code (sets CLAUDECODE=1)
		* - CLINE_ACTIVE: https://github.com/cline/cline (shipped in v3.24.0)
		* - CODEX_CI: https://github.com/openai/codex (part of UNIFIED_EXEC_ENV array in codex-rs)
		* - CURSOR_AGENT: Closed source. Referenced in a gist by johnlindquist.
		* - GEMINI_CLI: https://google-gemini.github.io/gemini-cli/docs/tools/shell.html (sets GEMINI_CLI=1)
		* - OPENCODE: https://github.com/opencode-ai/opencode (sets OPENCODE=1)
		*/
		Object.defineProperty(exports, "__esModule", { value: true });
		const knownAgents = [
		{ envVar: 'ANTIGRAVITY_AGENT', product: 'antigravity' },
		{ envVar: 'CLAUDECODE', product: 'claude-code' },
		{ envVar: 'CLINE_ACTIVE', product: 'cline' },
		{ envVar: 'CODEX_CI', product: 'codex' },
		{ envVar: 'CURSOR_AGENT', product: 'cursor' },
		{ envVar: 'GEMINI_CLI', product: 'gemini-cli' },
		{ envVar: 'OPENCODE', product: 'opencode' },
		];
		function detectAgent(env = process.env) {
		const detected = knownAgents.filter((a) => env[a.envVar]).map((a) => a.product);
		if (detected.length === 1) {
		return detected[0];
		}
		return '';
		}
		exports.default = detectAgent;
		//# sourceMappingURL=agentDetector.js.map

+1

dist/utils/agentDetector.js.map

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+12

dist/utils/queryTags.d.ts

		/**
		* Serializes a query tags dictionary into a string for use in confOverlay.
		*
		* Format: comma-separated key:value pairs, e.g. "key1:value1,key2:value2"
		* - If a value is null or undefined, the key is included without a colon or value
		* - Backslashes in keys are escaped; other special characters in keys are not escaped
		* - Special characters (backslash, colon, comma) in values are backslash-escaped
		*
		* @param queryTags - dictionary of query tag key-value pairs
		* @returns serialized string, or undefined if input is empty/null/undefined
		*/
		export default function serializeQueryTags(queryTags: Record<string, string \| null \| undefined> \| null \| undefined): string \| undefined;

+35

dist/utils/queryTags.js

		"use strict";
		Object.defineProperty(exports, "__esModule", { value: true });
		/**
		* Serializes a query tags dictionary into a string for use in confOverlay.
		*
		* Format: comma-separated key:value pairs, e.g. "key1:value1,key2:value2"
		* - If a value is null or undefined, the key is included without a colon or value
		* - Backslashes in keys are escaped; other special characters in keys are not escaped
		* - Special characters (backslash, colon, comma) in values are backslash-escaped
		*
		* @param queryTags - dictionary of query tag key-value pairs
		* @returns serialized string, or undefined if input is empty/null/undefined
		*/
		function serializeQueryTags(queryTags) {
		if (queryTags == null) {
		return undefined;
		}
		const keys = Object.keys(queryTags);
		if (keys.length === 0) {
		return undefined;
		}
		return keys
		.map((key) => {
		const escapedKey = key.replace(/\\/g, '\\\\');
		const value = queryTags[key];
		if (value == null) {
		return escapedKey;
		}
		const escapedValue = value.replace(/[\\:,]/g, (c) => `\\${c}`);
		return `${escapedKey}:${escapedValue}`;
		})
		.join(',');
		}
		exports.default = serializeQueryTags;
		//# sourceMappingURL=queryTags.js.map

+1

dist/utils/queryTags.js.map

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+7

-0

dist/contracts/IClientContext.d.ts

		@@ -24,5 +24,12 @@ import IDBSQLLogger from './IDBSQLLogger';
		telemetryMaxRetries?: number;
		telemetryBackoffBaseMs?: number;
		telemetryBackoffMaxMs?: number;
		telemetryBackoffJitterMs?: number;
		telemetryAuthenticatedExport?: boolean;
		telemetryCircuitBreakerThreshold?: number;
		telemetryCircuitBreakerTimeout?: number;
		telemetryMaxPendingMetrics?: number;
		telemetryMaxErrorsPerStatement?: number;
		telemetryStatementTtlMs?: number;
		userAgentEntry?: string;
		}
		@@ -29,0 +36,0 @@ export default interface IClientContext {

+6

-0

dist/contracts/IDBSQLClient.d.ts

		@@ -55,2 +55,8 @@ import IDBSQLLogger from './IDBSQLLogger';
		};
		/**
		* Session-level query tags as key-value pairs. Serialized and passed via session configuration
		* as "QUERY_TAGS". Values may be null/undefined to include a key without a value.
		* If both queryTags and configuration.QUERY_TAGS are specified, queryTags takes precedence.
		*/
		queryTags?: Record<string, string \| null \| undefined>;
		}
		@@ -57,0 +63,0 @@ export default interface IDBSQLClient {

+6

-0

dist/contracts/IDBSQLSession.d.ts

		@@ -23,2 +23,8 @@ import Int64 from 'node-int64';
		ordinalParameters?: Array<DBSQLParameter \| DBSQLParameterValue>;
		/**
		* Per-statement query tags as key-value pairs. Serialized and passed via confOverlay
		* as "query_tags". Values may be null/undefined to include a key without a value.
		* These tags apply only to this statement and do not persist across queries.
		*/
		queryTags?: Record<string, string \| null \| undefined>;
		};
		@@ -25,0 +31,0 @@ export type TypeInfoRequest = {

+8

-0

dist/DBSQLClient.d.ts

		@@ -60,2 +60,10 @@ /// <reference types="node" />
		getDriver(): Promise<IDriver>;
		/**
		* Returns the authentication provider associated with this client, if any.
		* Intended for internal telemetry/feature-flag call sites that need to
		* obtain auth headers directly without routing through `IClientContext`.
		*
		* @internal Not part of the public API. May change without notice.
		*/
		getAuthProvider(): IAuthentication \| undefined;
		}

+25

-0

dist/DBSQLClient.js

		@@ -185,2 +185,7 @@ "use strict";
		}
		// Persist userAgentEntry so telemetry and feature-flag call sites reuse
		// the same value as the primary Thrift connection's User-Agent.
		if (options.userAgentEntry !== undefined) {
		this.config.userAgentEntry = options.userAgentEntry;
		}
		this.authProvider = this.createAuthProvider(options, authProvider);
		@@ -231,2 +236,12 @@ this.connectionProvider = this.createConnectionProvider(options);
		}
		// Serialize queryTags dict and set in configuration; takes precedence over configuration.QUERY_TAGS
		if (request.queryTags !== undefined) {
		const serialized = (0, utils_1.serializeQueryTags)(request.queryTags);
		if (serialized) {
		configuration.QUERY_TAGS = serialized;
		}
		else {
		delete configuration.QUERY_TAGS;
		}
		}
		const response = await this.driver.openSession({
		@@ -280,4 +295,14 @@ client_protocol_i64: new node_int64_1.default(TCLIService_types_1.TProtocolVersion.SPARK_CLI_SERVICE_PROTOCOL_V8),
		}
		/**
		* Returns the authentication provider associated with this client, if any.
		* Intended for internal telemetry/feature-flag call sites that need to
		* obtain auth headers directly without routing through `IClientContext`.
		*
		* @internal Not part of the public API. May change without notice.
		*/
		getAuthProvider() {
		return this.authProvider;
		}
		}
		exports.default = DBSQLClient;
		//# sourceMappingURL=DBSQLClient.js.map

+1

-1

dist/DBSQLClient.js.map

		@@ -1,1 +0,1 @@
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+4

-0

dist/DBSQLSession.js

		@@ -184,2 +184,6 @@ "use strict";
		}
		const serializedQueryTags = (0, utils_1.serializeQueryTags)(options.queryTags);
		if (serializedQueryTags !== undefined) {
		request.confOverlay = { ...request.confOverlay, query_tags: serializedQueryTags };
		}
		if (utils_1.ProtocolVersion.supportsCloudFetch(this.serverProtocolVersion)) {
		@@ -186,0 +190,0 @@ request.canDownloadResult = (_a = options.useCloudFetch) !== null && _a !== void 0 ? _a : clientConfig.useCloudFetch;

+1

-1

dist/DBSQLSession.js.map

		@@ -1,1 +0,1 @@
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+2

-0

dist/index.d.ts

		@@ -15,2 +15,4 @@ import './polyfills';
		export type { default as ITokenProvider } from './connection/auth/tokenProvider/ITokenProvider';
		export { CircuitBreakerOpenError, CIRCUIT_BREAKER_OPEN_CODE } from './telemetry/CircuitBreaker';
		export { TelemetryTerminalError } from './telemetry/DatabricksTelemetryExporter';
		export declare const auth: {
		@@ -17,0 +19,0 @@ PlainHttpAuthentication: typeof PlainHttpAuthentication;

+8

-1

dist/index.js

		@@ -6,3 +6,3 @@ "use strict";
		Object.defineProperty(exports, "__esModule", { value: true });
		exports.LogLevel = exports.DBSQLLogger = exports.DBSQLParameterType = exports.DBSQLParameter = exports.DBSQLSession = exports.DBSQLClient = exports.utils = exports.thrift = exports.connections = exports.TProtocolExceptionType = exports.TProtocolException = exports.TApplicationExceptionType = exports.TApplicationException = exports.TException = exports.auth = void 0;
		exports.LogLevel = exports.DBSQLLogger = exports.DBSQLParameterType = exports.DBSQLParameter = exports.DBSQLSession = exports.DBSQLClient = exports.utils = exports.thrift = exports.connections = exports.TProtocolExceptionType = exports.TProtocolException = exports.TApplicationExceptionType = exports.TApplicationException = exports.TException = exports.auth = exports.TelemetryTerminalError = exports.CIRCUIT_BREAKER_OPEN_CODE = exports.CircuitBreakerOpenError = void 0;
		// Don't move this import - it should be placed before any other
		@@ -28,2 +28,9 @@ require("./polyfills");
		Object.defineProperty(exports, "LogLevel", { enumerable: true, get: function () { return IDBSQLLogger_1.LogLevel; } });
		// Re-export telemetry error classes so consumers can instanceof-check rather
		// than string-matching error messages.
		var CircuitBreaker_1 = require("./telemetry/CircuitBreaker");
		Object.defineProperty(exports, "CircuitBreakerOpenError", { enumerable: true, get: function () { return CircuitBreaker_1.CircuitBreakerOpenError; } });
		Object.defineProperty(exports, "CIRCUIT_BREAKER_OPEN_CODE", { enumerable: true, get: function () { return CircuitBreaker_1.CIRCUIT_BREAKER_OPEN_CODE; } });
		var DatabricksTelemetryExporter_1 = require("./telemetry/DatabricksTelemetryExporter");
		Object.defineProperty(exports, "TelemetryTerminalError", { enumerable: true, get: function () { return DatabricksTelemetryExporter_1.TelemetryTerminalError; } });
		exports.auth = {
		@@ -30,0 +37,0 @@ PlainHttpAuthentication: PlainHttpAuthentication_1.default,

+1

-1

dist/index.js.map

		@@ -1,1 +0,1 @@
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+12

-0

dist/telemetry/ExceptionClassifier.js

		@@ -83,2 +83,14 @@ "use strict";
		}
		// Transient network errors. Notably does NOT include `ENOTFOUND`:
		// DNS "not found" usually indicates a misconfigured host, not a transient
		// fault. Retrying pushes load at the resolver without any expectation of
		// success; circuit-breaker failure accounting is the better response.
		const errorCode = error.code;
		if (errorCode === 'ECONNREFUSED' \|\|
		errorCode === 'ECONNRESET' \|\|
		errorCode === 'EHOSTUNREACH' \|\|
		errorCode === 'ETIMEDOUT' \|\|
		errorCode === 'EAI_AGAIN') {
		return true;
		}
		// Check for HTTP status codes in error properties
		@@ -85,0 +97,0 @@ // Supporting both 'statusCode' and 'status' property names for flexibility

+1

-1

dist/telemetry/ExceptionClassifier.js.map

		@@ -1,1 +0,1 @@
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+37

-4

dist/telemetry/types.d.ts

		@@ -17,2 +17,6 @@ /**
		/**
		* Driver name constant for telemetry
		*/
		export declare const DRIVER_NAME = "nodejs-sql-driver";
		/**
		* Event types emitted by the telemetry system
		@@ -25,3 +29,3 @@ */
		CLOUDFETCH_CHUNK = "cloudfetch.chunk",
		ERROR = "error"
		ERROR = "telemetry.error"
		}
		@@ -38,4 +42,10 @@ /**
		flushIntervalMs?: number;
		/** Maximum retry attempts for export */
		/** Maximum retry attempts for export (attempts after the initial call) */
		maxRetries?: number;
		/** Minimum backoff delay in ms for retry backoff */
		backoffBaseMs?: number;
		/** Maximum backoff delay in ms (includes jitter) */
		backoffMaxMs?: number;
		/** Upper bound of added jitter in ms */
		backoffJitterMs?: number;
		/** Whether to use authenticated export endpoint */
		@@ -47,2 +57,8 @@ authenticatedExport?: boolean;
		circuitBreakerTimeout?: number;
		/** Maximum number of pending metrics buffered before dropping oldest */
		maxPendingMetrics?: number;
		/** Maximum number of error events buffered per statement before dropping oldest */
		maxErrorsPerStatement?: number;
		/** TTL in ms after which abandoned statement aggregations are evicted */
		statementTtlMs?: number;
		}
		@@ -52,3 +68,3 @@ /**
		*/
		export declare const DEFAULT_TELEMETRY_CONFIG: Required<TelemetryConfiguration>;
		export declare const DEFAULT_TELEMETRY_CONFIG: Readonly<Required<TelemetryConfiguration>>;
		/**
		@@ -59,3 +75,3 @@ * Runtime telemetry event emitted by the driver
		/** Type of the event */
		eventType: TelemetryEventType \| string;
		eventType: TelemetryEventType;
		/** Timestamp when the event occurred (milliseconds since epoch) */
		@@ -93,2 +109,4 @@ timestamp: number;
		errorMessage?: string;
		/** Stack trace, captured at emission site; redacted before export */
		errorStack?: string;
		/** Whether the error is terminal (non-retryable) */
		@@ -127,2 +145,4 @@ isTerminal?: boolean;
		errorMessage?: string;
		/** Stack trace, captured at emission site; redacted before export */
		errorStack?: string;
		}
		@@ -143,2 +163,15 @@ /**
		osVersion: string;
		/** OS architecture (x64, arm64, etc.) */
		osArch: string;
		/** Runtime vendor (Node.js Foundation) */
		runtimeVendor: string;
		/** Locale name (e.g., en_US) */
		localeName: string;
		/** Character set encoding (e.g., UTF-8) */
		charSetEncoding: string;
		/**
		* Process name. Producers MUST pass only a basename (no absolute path) —
		* `sanitizeProcessName()` is applied at export time as a defence in depth.
		*/
		processName: string;
		/** Whether CloudFetch is enabled */
		@@ -145,0 +178,0 @@ cloudFetchEnabled: boolean;

+15

-5

dist/telemetry/types.js

		@@ -18,4 +18,8 @@ "use strict";
		Object.defineProperty(exports, "__esModule", { value: true });
		exports.DEFAULT_TELEMETRY_CONFIG = exports.TelemetryEventType = void 0;
		exports.DEFAULT_TELEMETRY_CONFIG = exports.TelemetryEventType = exports.DRIVER_NAME = void 0;
		/**
		* Driver name constant for telemetry
		*/
		exports.DRIVER_NAME = 'nodejs-sql-driver';
		/**
		* Event types emitted by the telemetry system
		@@ -29,3 +33,3 @@ */
		TelemetryEventType["CLOUDFETCH_CHUNK"] = "cloudfetch.chunk";
		TelemetryEventType["ERROR"] = "error";
		TelemetryEventType["ERROR"] = "telemetry.error";
		})(TelemetryEventType = exports.TelemetryEventType \|\| (exports.TelemetryEventType = {}));
		@@ -35,3 +39,3 @@ /**
		*/
		exports.DEFAULT_TELEMETRY_CONFIG = {
		exports.DEFAULT_TELEMETRY_CONFIG = Object.freeze({
		enabled: false,
		@@ -41,6 +45,12 @@ batchSize: 100,
		maxRetries: 3,
		backoffBaseMs: 100,
		backoffMaxMs: 1000,
		backoffJitterMs: 100,
		authenticatedExport: true,
		circuitBreakerThreshold: 5,
		circuitBreakerTimeout: 60000, // 1 minute
		};
		circuitBreakerTimeout: 60000,
		maxPendingMetrics: 500,
		maxErrorsPerStatement: 50,
		statementTtlMs: 60 * 60 * 1000, // 1 hour
		});
		//# sourceMappingURL=types.js.map

+1

-1

dist/telemetry/types.js.map

		@@ -1,1 +0,1 @@
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+7

-1

dist/utils/buildUserAgentString.js

		@@ -8,2 +8,3 @@ "use strict";
		const version_1 = __importDefault(require("../version"));
		const agentDetector_1 = __importDefault(require("./agentDetector"));
		const productName = 'NodejsDatabricksSqlConnector';
		@@ -30,5 +31,10 @@ function getNodeVersion() {
		const extra = [userAgentEntry, getNodeVersion(), getOperatingSystemVersion()].filter(Boolean);
		return `${productName}/${version_1.default} (${extra.join('; ')})`;
		let ua = `${productName}/${version_1.default} (${extra.join('; ')})`;
		const agentProduct = (0, agentDetector_1.default)();
		if (agentProduct) {
		ua += ` agent/${agentProduct}`;
		}
		return ua;
		}
		exports.default = buildUserAgentString;
		//# sourceMappingURL=buildUserAgentString.js.map

+1

-1

dist/utils/buildUserAgentString.js.map

		@@ -1,1 +0,1 @@
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+2

-1

dist/utils/index.d.ts

		@@ -6,2 +6,3 @@ import definedOrError from './definedOrError';
		import * as ProtocolVersion from './protocolVersion';
		export { definedOrError, buildUserAgentString, formatProgress, ProgressUpdateTransformer, LZ4, ProtocolVersion };
		import serializeQueryTags from './queryTags';
		export { definedOrError, buildUserAgentString, formatProgress, ProgressUpdateTransformer, LZ4, ProtocolVersion, serializeQueryTags, };

+3

-1

dist/utils/index.js

		@@ -29,3 +29,3 @@ "use strict";
		Object.defineProperty(exports, "__esModule", { value: true });
		exports.ProtocolVersion = exports.LZ4 = exports.ProgressUpdateTransformer = exports.formatProgress = exports.buildUserAgentString = exports.definedOrError = void 0;
		exports.serializeQueryTags = exports.ProtocolVersion = exports.LZ4 = exports.ProgressUpdateTransformer = exports.formatProgress = exports.buildUserAgentString = exports.definedOrError = void 0;
		const definedOrError_1 = __importDefault(require("./definedOrError"));
		@@ -42,2 +42,4 @@ exports.definedOrError = definedOrError_1.default;
		exports.ProtocolVersion = ProtocolVersion;
		const queryTags_1 = __importDefault(require("./queryTags"));
		exports.serializeQueryTags = queryTags_1.default;
		//# sourceMappingURL=index.js.map

+1

-1

dist/utils/index.js.map

		@@ -1,1 +0,1 @@
		{"version":3,"file":"index.js","sourceRoot":"","sources":["../../lib/utils/index.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;AAAA,sEAA8C;AAMrC,yBANF,wBAAc,CAME;AALvB,kFAA0D;AAKjC,+BALlB,8BAAoB,CAKkB;AAJ7C,mEAA6E;AAI9B,yBAJxC,wBAAc,CAIwC;AAAE,0GAJtC,0CAAyB,OAIsC;AAHxF,gDAAwB;AAGkE,cAHnF,aAAG,CAGmF;AAF7F,mEAAqD;AAE0C,0CAAe"}
		{"version":3,"file":"index.js","sourceRoot":"","sources":["../../lib/utils/index.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;AAAA,sEAA8C;AAQ5C,yBARK,wBAAc,CAQL;AAPhB,kFAA0D;AAQxD,+BARK,8BAAoB,CAQL;AAPtB,mEAA6E;AAQ3E,yBARK,wBAAc,CAQL;AACd,0GATuB,0CAAyB,OASvB;AAR3B,gDAAwB;AAStB,cATK,aAAG,CASL;AARL,mEAAqD;AASnD,0CAAe;AARjB,4DAA6C;AAS3C,6BATK,mBAAkB,CASL"}

+1

-1

dist/version.d.ts

		@@ -1,2 +0,2 @@
		declare const _default: "1.13.0";
		declare const _default: "1.14.0";
		export default _default;

+1

-1

dist/version.js

		"use strict";
		Object.defineProperty(exports, "__esModule", { value: true });
		exports.default = '1.13.0';
		exports.default = '1.14.0';
		//# sourceMappingURL=version.js.map

+1

-1

package.json

		{
		"name": "@databricks/sql",
		"version": "1.13.0",
		"version": "1.14.0",
		"description": "Driver for connection to Databricks SQL via Thrift API.",
		@@ -5,0 +5,0 @@ "main": "dist/index.js",

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