message: Sqllab  dont send empty queries to db
  * add lanscape?
  * prevent empty queries from being sent to db
  * Revert "add lanscape?"
  This reverts commit
  * improve code style
  * nit
  * unnit
  * renit
diff: @@ -76,6 +76,9 @@ class SqlEditor extends React.PureComponent {
  this.props.actions.queryEditorSetSql(this.props.queryEditor, sql);
  }
  runQuery(runAsync = false) {
  + if (!this.props.queryEditor.sql) {
  + return;
  + }
  let effectiveRunAsync = runAsync;
  if (!this.props.database.allow_run_sync) {
  effectiveRunAsync = true;
  