Yuan Tian created IOTDB-5026:
--------------------------------
Summary: Improvement of Last Query in MPP
Key: IOTDB-5026
URL: https://issues.apache.org/jira/browse/IOTDB-5026
Project: Apache IoTDB
Issue Type: Improvement
Components: Core/Query
Reporter: Yuan Tian
Assignee: liaolanyu
In tsbs last-point case which contains 4000 devices and 10 sensors for each
devuce, we found that too much time spent in plan phase while executing `select
last * from root.cpu.*`. It's because even if we use aligned device in such
case, we still treat each sensor as non-aligned, so we generate 40,000
plannodes which are too time-consuming.
Actually, we should figure out a way to make control of the plan nodes number.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
