var supdb = openDatabase('mike@luabase.com', '262', 'blah', 2 * 1024 * 1024);

function successHandler(tx, results) {
  var arr = []
  console.log('found: ', results.rows.length)
  for (let i = 0; i < results.rows.length; i++) {
    let row = results.rows.item([i]);
    arr.push(row)
  }
  console.log(arr)
}
function errorHandler(transaction, error) {
  console.log(`Error : ${error.message}`);
}
function execSql(db, sql, q, successHandler) {
  db.transaction(function (tx) { 
      tx.executeSql(sql, [], successHandler, errorHandler); 
  })
}

var sql = `
select *
from messages
limit 20
`

execSql(supdb, sql, '', successHandler)