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https://issues.apache.org/jira/browse/IGNITE-4141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15947101#comment-15947101
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Evgenii Zhuravlev commented on IGNITE-4141:
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[~vkulichenko], thanks for your review. I added my fix to the current jdbc
driver mode.
> JDBC driver should always set withKeepBinary flag when querying cache
> ---------------------------------------------------------------------
>
> Key: IGNITE-4141
> URL: https://issues.apache.org/jira/browse/IGNITE-4141
> Project: Ignite
> Issue Type: Improvement
> Components: jdbc-driver, SQL
> Affects Versions: 1.7
> Reporter: Valentin Kulichenko
> Assignee: Evgenii Zhuravlev
>
> Generally there are no model classes on the client which uses JDBC driver.
> This means that an attempt to query {{_key}} and {{_val}} fields (which are
> included in {{select *}}) will fail with "Failed resolve class for ID" error.
> To avoid this we should always set {{withKeepBinary()}} flag when executing
> query on server side.
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