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https://issues.apache.org/jira/browse/IGNITE-19788?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Evgeny Stanilovsky reassigned IGNITE-19788:
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Assignee: Evgeny Stanilovsky
> Sql. Improve QueryBatchMessage serialisation
> --------------------------------------------
>
> Key: IGNITE-19788
> URL: https://issues.apache.org/jira/browse/IGNITE-19788
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Reporter: Konstantin Orlov
> Assignee: Evgeny Stanilovsky
> Priority: Major
> Labels: ignite-3
>
> As of now, java's built-in serialisation is used to marshal rows in
> QueryBatchMessage. It's quite inefficient in terms of the size of serialised
> batch. Besides, network marshaller is unable to estimate the size of
> serialised data in advance, thus serialising the entire batch as a single
> buffer.
> Let's address the part that force marshaller to create a buffer of entire
> batch. Optimal serialisation of each particular row is subject for another
> JIRA case.
> Proposed solution
> * Extend interface {{org.apache.ignite.internal.sql.engine.exec.RowHandler}}
> with method {{ByteBuffer toByteBuffer(RowT row)}}
> * Extend interface
> {{org.apache.ignite.internal.sql.engine.exec.RowHandler.RowFactory}} with
> method {{RowT create(ByteBuffer buffer)}}
> * Cover {{ArrayRowHandler}} with tests
> * Change return type of
> {{org.apache.ignite.internal.sql.engine.message.QueryBatchMessage#rows}} to
> {{List<ByteBuffer>}}
> * Adjust related code
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