message: [explore flow] handling duplicated column aliases
  * [explore flow] handling duplicated column aliases
  closes
  * lint
diff: @@ -58,7 +58,7 @@ class ExploreResultsButton extends React.PureComponent {
  title: t('Explore'),
  body: msg,
  actions: [
  - Dialog.DefaultAction('Ok', () => {}, 'btn-danger'),
  + Dialog.DefaultAction('Ok', () => {}, 'btn-primary'),
  ],
  bsSize: 'large',
  bsStyle: 'warning',
  @@ -81,8 +81,11 @@ class ExploreResultsButton extends React.PureComponent {
  return moment.duration(this.props.query.endDttm - this.props.query.startDttm).asSeconds();
  }
  getInvalidColumns() {
  - const re = /^[A-Za-z_]\w*$/;
  - return this.props.query.results.columns.map(col => col.name).filter(col => !re.test(col));
  + const re1 = /^[A-Za-z_]\w*$/; // starts with char or _, then only alphanum
  + const re2 = /__\d+$/; // does not finish with __ and then a number which screams dup col name
  +
  + return this.props.query.results.columns.map(col => col.name)
  + .filter(col => !re1.test(col) || re2.test(col));
  }
  datasourceName() {
  const { query } = this.props;
  @@ -155,7 +158,9 @@ class ExploreResultsButton extends React.PureComponent {
  <code>SELECT count(*)
  <strong>AS my_alias</strong>
  </code>){' '}
  - {t('limited to alphanumeric characters and underscores')}
  + {t('limited to alphanumeric characters and underscores. Column aliases ending with ' +
  + 'double underscores followed by a numeric value are not allowed for reasons ' +
  + 'discussed in Github issue #5739.')}
  </div>);
  }
  render() {
  