yunfeng created CALCITE-3442:
--------------------------------
Summary: Set `stored_fields = _none` prohibit `FetchPhase` get be
involved and improve the Performance for Elasticsearch
Key: CALCITE-3442
URL: https://issues.apache.org/jira/browse/CALCITE-3442
Project: Calcite
Issue Type: Improvement
Components: elasticsearch-adapter
Reporter: yunfeng
Fix For: next
For elasticsearch-adapte, when ElasticsearchAggregat involved , set _source
= false and size = 0 , Elasticsearch `FetchPhase` would still be executed
against the current search process and visit the Lucene stored_fields, which
would lead to performance declined dramatically.
We can set `stored_fields = _none` prohibit this such behavior completely
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
