kami-parse-server/src/Adapters/Storage/Postgres/PostgresClient.js

const parser = require('./PostgresConfigParser');

export function createClient(uri, databaseOptions) {
  let dbOptions = {};
  databaseOptions = databaseOptions || {};

  if (uri) {
    dbOptions = parser.getDatabaseOptionsFromURI(uri);
  }

  for (const key in databaseOptions) {
    dbOptions[key] = databaseOptions[key];
  }

  const initOptions = dbOptions.initOptions || {};
  initOptions.noWarnings = process && process.env.TESTING;

  const pgp = require('pg-promise')(initOptions);
  const client = pgp(dbOptions);

  if (process.env.PARSE_SERVER_LOG_LEVEL === 'debug') {
    const monitor = require('pg-monitor');
    try {
      monitor.attach(initOptions);
    } catch (e) {
      monitor.detach();
      monitor.attach(initOptions);
    }
  }

  if (dbOptions.pgOptions) {
    for (const key in dbOptions.pgOptions) {
      pgp.pg.defaults[key] = dbOptions.pgOptions[key];
    }
  }

  return { client, pgp };
}