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specially\n  important for auto-loaders and meta-packages.\n*/\ninterface QueryOptions {\n  sql: string;\n  values?: any | any[] | { [param: string]: any };\n}\n\ninterface Query {\n  sql: string;\n}\n\ninterface Config {\n  host?: string;\n  port?: number;\n  database?: string;\n  user?: string;\n  connectionConfig?: Config;\n}\n\n/**\n * Get an Attributes map from a mysql connection config object\n *\n * @param config ConnectionConfig\n */\nexport function getConnectionAttributes(\n  config: Config,\n  dbSemconvStability: SemconvStability,\n  netSemconvStability: SemconvStability\n): Attributes {\n  const { host, port, database, user } = getConfig(config);\n\n  const attrs: Attributes = {};\n  if (dbSemconvStability & SemconvStability.OLD) {\n    attrs[ATTR_DB_CONNECTION_STRING] = getJDBCString(host, port, database);\n    attrs[ATTR_DB_NAME] = database;\n    attrs[ATTR_DB_USER] = user;\n  }\n  if (dbSemconvStability & SemconvStability.STABLE) {\n    attrs[ATTR_DB_NAMESPACE] = database;\n  }\n\n  const portNumber = parseInt(port, 10);\n  if (netSemconvStability & SemconvStability.OLD) {\n    attrs[ATTR_NET_PEER_NAME] = host;\n    if (!isNaN(portNumber)) {\n      attrs[ATTR_NET_PEER_PORT] = portNumber;\n    }\n  }\n  if (netSemconvStability & SemconvStability.STABLE) {\n    attrs[ATTR_SERVER_ADDRESS] = host;\n    if (!isNaN(portNumber)) {\n      attrs[ATTR_SERVER_PORT] = portNumber;\n    }\n  }\n\n  return attrs;\n}\n\nfunction getConfig(config: any) {\n  const { host, port, database, user } =\n    (config && config.connectionConfig) || config || {};\n  return { host, port, database, user };\n}\n\nfunction getJDBCString(\n  host: string | undefined,\n  port: number | undefined,\n  database: string | undefined\n) {\n  let jdbcString = `jdbc:mysql://${host || 'localhost'}`;\n\n  if (typeof port === 'number') {\n    jdbcString += `:${port}`;\n  }\n\n  if (typeof database === 'string') {\n    jdbcString += `/${database}`;\n  }\n\n  return jdbcString;\n}\n\n/**\n * Conjures up the value for the db.query.text attribute by formatting a SQL query.\n */\nexport function getQueryText(\n  query: string | Query | QueryOptions,\n  format?: formatType,\n  values?: any[],\n  maskStatement = false,\n  maskStatementHook: MySQL2InstrumentationQueryMaskingHook = defaultMaskingHook\n): string {\n  const [querySql, queryValues] =\n    typeof query === 'string'\n      ? [query, values]\n      : [query.sql, hasValues(query) ? values || query.values : values];\n  try {\n    if (maskStatement) {\n      return maskStatementHook(querySql);\n    } else if (format && queryValues) {\n      return format(querySql, queryValues);\n    } else {\n      return querySql;\n    }\n  } catch (e) {\n    return 'Could not determine the query due to an error in masking or formatting';\n  }\n}\n\n/**\n * Replaces numeric values and quoted strings in the query with placeholders ('?').\n *\n * - `\\b\\d+\\b`: Matches whole numbers (integers) and replaces them with '?'.\n * - `([\"'])(?:(?=(\\\\?))\\2.)*?\\1`:\n *   - Matches quoted strings (both single `'` and double `\"` quotes).\n *   - Uses a lookahead `(?=(\\\\?))` to detect an optional backslash without consuming it immediately.\n *   - Captures the optional backslash `\\2` and ensures escaped quotes inside the string are handled correctly.\n *   - Ensures that only complete quoted strings are replaced with '?'.\n *\n * This prevents accidental replacement of escaped quotes within strings and ensures that the\n * query structure remains intact while masking sensitive data.\n */\nfunction defaultMaskingHook(query: string): string {\n  return query\n    .replace(/\\b\\d+\\b/g, '?')\n    .replace(/([\"'])(?:(?=(\\\\?))\\2.)*?\\1/g, '?');\n}\n\nfunction hasValues(obj: Query | QueryOptions): obj is QueryOptions {\n  return 'values' in obj;\n}\n\n/**\n * The span name SHOULD be set to a low cardinality value\n * representing the statement executed on the database.\n *\n * @returns SQL statement without variable arguments or SQL verb\n */\nexport function getSpanName(query: string | Query | QueryOptions): string {\n  const rawQuery = typeof query === 'object' ? query.sql : query;\n  // Extract the SQL verb\n  const firstSpace = rawQuery?.indexOf(' ');\n  if (typeof firstSpace === 'number' && firstSpace !== -1) {\n    return rawQuery?.substring(0, firstSpace);\n  }\n  return rawQuery;\n}\n\nexport const once = (fn: Function) => {\n  let called = false;\n  return (...args: unknown[]) => {\n    if (called) return;\n    called = true;\n    return fn(...args);\n  };\n};\n\nexport function getConnectionPrototypeToInstrument(connection: any) {\n  const connectionPrototype = connection.prototype;\n  const basePrototype = Object.getPrototypeOf(connectionPrototype);\n\n  // mysql2@3.11.5 included a refactoring, where most code was moved out of the `Connection` class and into a shared base\n  // so we need to instrument that instead, see https://github.com/sidorares/node-mysql2/pull/3081\n  // This checks if the functions we're instrumenting are there on the base - we cannot use the presence of a base\n  // prototype since EventEmitter is the base for mysql2@<=3.11.4\n  if (\n    typeof basePrototype?.query === 'function' &&\n    typeof basePrototype?.execute === 'function'\n  ) {\n    return basePrototype;\n  }\n\n  // otherwise instrument the connection directly.\n  return connectionPrototype;\n}\n"]}