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Posted to dev@iotdb.apache.org by "Jialin Qiao (Jira)" <ji...@apache.org> on 2020/02/15 07:57:00 UTC

[jira] [Commented] (IOTDB-482) Vectorized TimeGenerator

    [ https://issues.apache.org/jira/browse/IOTDB-482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17037455#comment-17037455 ] 

Jialin Qiao commented on IOTDB-482:
-----------------------------------

For all query types with value filter, such as where s1=1 or s2=1, we will construct a TimeGenerator to get the timestamp in the result.

In the above case, the generator tree is OrNode(LeafNode(s1=1), LeafNode(s2=1)).

In the engine, each leafnode corresponds to a SeriesRawDataPointReader. It's possible to use SeriesRawDataBatchReader in each leafnode and internal nodes to speed up the time generator.

 

It could also be optimized in the TsFile module.

> Vectorized TimeGenerator
> ------------------------
>
>                 Key: IOTDB-482
>                 URL: https://issues.apache.org/jira/browse/IOTDB-482
>             Project: Apache IoTDB
>          Issue Type: Sub-task
>          Components: Core/Engine
>            Reporter: atoildw
>            Assignee: atoildw
>            Priority: Major
>             Fix For: 0.10.0-SNAPSHOT
>
>




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