worker.js

/**
 * Taken and modified from
 * http://stackoverflow.com/questions/4747808/split-mysql-queries-in-array-each-queries-separated-by/5610067#5610067
 */
const regex = /\s*((?:'[^'\\]*(?:\\.[^'\\]*)*'|"[^"\\]*(?:\\.[^"\\]*)*"|\/\*[^*]*\*+(?:[^*\/][^*]*\*+)*\/|#.*|--.*|[^"';#])+(?:;|$))/g;
const re = new RegExp(regex, 'g');

self.addEventListener('message', function(e) {
  var data = e.data;
  if (data.queries === '') {
    postMessage([]);
    return;
  }
  const matches = data.queries.match(re);
  const response = matches
    .filter((line) => line.trim() !== '')
    .map((line) => line.trim());
  postMessage(response);
}, false);

wrapper.js

const maxSqlExecutionTime = 2000;
import Promise from 'bluebird';

export default function(queries) {
  var promise = new Promise(function(resolve, reject) {
    // worker-loader webpack plugin
    const worker = require('worker-loader?inline!./worker.js')();
    var success = false;
    worker.onmessage = function(e) {
      success = true;
      resolve(e.data);
    };
    worker.postMessage({
      queries: queries
    });
    setTimeout(function() {
      if (!success) {
        reject();
      }
      worker.terminate();
    }, maxSqlExecutionTime);
  });
  return promise;
}