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https://issues.apache.org/jira/browse/NIFI-13351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17852052#comment-17852052
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ASF subversion and git services commented on NIFI-13351:
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Commit 85cf0e995e4f7d89e3ddaba0c1fb8f9a36c956ef in nifi's branch
refs/heads/main from Jim Steinebrey
[ https://gitbox.apache.org/repos/asf?p=nifi.git;h=85cf0e995e ]
NIFI-13351 Improved QueryDatabaseTable Processors to call
session.putAttributes()
This closes #8919
Signed-off-by: David Handermann <exceptionfact...@apache.org>
> Enhance QueryDatabaseTable and QueryDatabaseTableRecord processors not to
> call session.putAttribute multiple times
> ------------------------------------------------------------------------------------------------------------------
>
> Key: NIFI-13351
> URL: https://issues.apache.org/jira/browse/NIFI-13351
> Project: Apache NiFi
> Issue Type: Improvement
> Affects Versions: 1.26.0, 2.0.0-M3
> Reporter: Jim Steinebrey
> Assignee: Jim Steinebrey
> Priority: Major
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Per [~markap14] in the following
> [post|https://lists.apache.org/thread/7zo2px31r3377c7vhby4h6nrngdf3llf] one
> should avoid calling session.putAttribute many times since in order to
> maintain object immutability it has to create a new FlowFile object (and a
> new HashMap of all attributes!) for every call to session.putAttribute which
> leads to potentially a large amount of unneeded garbage getting created.
> Enhance QueryDatabaseTable and QueryDatabaseTableRecord processors not to
> call session.putAttribute multiple times in a for loop for column max values.
> The repeated putAttribute calls exist in AbstractQueryDatabaseTable which is
> extended by those two processors.
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