This happens because there is a basic check to see if something is a date by looking for :, -, and / in the string before trying to parse it. Otherwise, is 20120101 a numeric number or a date? I guess we can improve that to also look for T, and if its there, try and parse.
On Friday, February 10, 2012 at 3:13 PM, Wojciech Durczyński wrote:
Issue created:
date_formats doesn't work · Issue #1690 · elastic/elasticsearch · GitHub