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Posted to issues@ignite.apache.org by "Sergey Korotkov (Jira)" <ji...@apache.org> on 2024/12/05 03:27:00 UTC

[jira] [Updated] (IGNITE-23239) JDBC: support and optimize stream APIs for CLOBs

     [ https://issues.apache.org/jira/browse/IGNITE-23239?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Korotkov updated IGNITE-23239:
-------------------------------------
    Priority: Minor  (was: Major)

> JDBC: support and optimize stream APIs for CLOBs
> ------------------------------------------------
>
>                 Key: IGNITE-23239
>                 URL: https://issues.apache.org/jira/browse/IGNITE-23239
>             Project: Ignite
>          Issue Type: Task
>            Reporter: Sergey Korotkov
>            Assignee: Sergey Korotkov
>            Priority: Minor
>              Labels: ise, jdbc
>
> Currently the stream-related APIs for CLOBs are not supported in JDBC drivers (both client and thin).  Say the following ones:
>  * Clob.setCharacterStream
>  * Clob.setAsciiStream
>  * PreparedStatement.setClob(int parameterIndex, Reader reader)
>  * PreparedStatement.setCharacterStream
>  * PreparedStatement.setAsciiStream
>  * 
> PreparedStatement.setUnicodeStream
> It makes the creation of CLOBs inefficient (memory wise) for large data.
> The whole data should be preloaded to RAM before the LOB creation.
> After that several copies of the input memory blocks are created just to pass it to prepared statement etc. It should be optimized to reduce the heap memory requirements.



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