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https://issues.apache.org/jira/browse/IOTDB-622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17094115#comment-17094115
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WangChao commented on IOTDB-622:
--------------------------------
Ok, that looks good.
I have one question, if the the database has two storage group: root.ln,
root.a.b, when I want to count the total records, I should type
Select count(s1） from root level 3 or 4?
Or only one stroage group, but has two device with different depth level:
root.ln.d1, root.ln.gate.d2, how to count the total number of the storage group?
Actually, I don't like level, I think we should give group name to every level,
then group by the group name, not the level number.
Maybe we should rethink the query grammar for user, I think we could change
the query grammar more like standard sql, and use a proxy to transfer old
grammar to new query model, this also has downward compatibility.
> count all records of the whole database
> ---------------------------------------
>
> Key: IOTDB-622
> URL: https://issues.apache.org/jira/browse/IOTDB-622
> Project: Apache IoTDB
> Issue Type: Improvement
> Components: Core/Engine
> Reporter: WangChao
> Assignee: WangChao
> Priority: Trivial
>
> Now the count function only count the number of every timeseries, it's useful
> to count the total record of the specific path.
>
> like:
>
> *_select count(*) from root.ln._** should return the total number of the
> records in storage group root.ln, but now it returns the number of each
> timeseries which is in root.ln.
>
> Please leave your opinion.
>
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