Yuan Tian created IOTDB-2186:
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Summary: Optimization for fill query
Key: IOTDB-2186
URL: https://issues.apache.org/jira/browse/IOTDB-2186
Project: Apache IoTDB
Issue Type: Improvement
Components: Core/Query
Reporter: Yuan Tian
Assignee: crz
Fix For: master branch
Currently, while doing fill query, like
`select s1 from root.sg1.d1 where time=100 fill(float[previous])`
we first do raw query for `select s1 from root.sg1.d1 where time=1` and then if
the result is null, we will construct another last query for it.
However, we can use `select s1 from root.sg1.d1 where time <= 100 limit 1` to
do that.
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