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https://issues.apache.org/jira/browse/IOTDB-749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17127948#comment-17127948
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Julian Feinauer commented on IOTDB-749:
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If I am right, Calcite handles the interaction between the Engine and the JDBC
Server by returning something similar to an Iterable (Internally its based on
their Linq4j). Then the Server / JDBC Endpoint can "pull" values as needed.
Something like this could also be interesting for us I think.
> Handle select * from root OOM
> -----------------------------
>
> Key: IOTDB-749
> URL: https://issues.apache.org/jira/browse/IOTDB-749
> Project: Apache IoTDB
> Issue Type: Improvement
> Components: Core/Engine
> Reporter: Jialin Qiao
> Priority: Major
>
> In this query, select * from root
> the server will cache [the total time series * fetch size] points. This may
> cause OOM, we need to handle this.
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