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https://issues.apache.org/jira/browse/IMPALA-9570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Quanlong Huang resolved IMPALA-9570.
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Fix Version/s: Impala 4.0.0
Resolution: Fixed
> Document about memory management for writing UDAFs
> --------------------------------------------------
>
> Key: IMPALA-9570
> URL: https://issues.apache.org/jira/browse/IMPALA-9570
> Project: IMPALA
> Issue Type: Documentation
> Components: Docs
> Reporter: Quanlong Huang
> Assignee: shajini thayasingh
> Priority: Major
> Fix For: Impala 4.0.0
>
> Attachments: apache doc.png, cloudera doc.png,
> image-2020-04-24-14-11-18-449.png
>
>
> In the current document, we have few words about memory management for
> writing UDAFs:
> [https://impala.apache.org/docs/build/html/topics/impala_udf.html]
> The only related sentense is "A serialize function that ... frees any memory
> allocated during the init, update, and merge phases."
> We can add more for clarifying it or add this link for further reading:
> [https://github.com/apache/impala/blob/2f53783b14ddf215a4c96bc52a511d3a83896128/be/src/udf/udf.h#L358-L365]
> BTW, the links of uda-sample.h and uda-sample.cc are not shown:
> [http://impala.apache.org/docs/build/html/topics/impala_udf.html#uda_functions]
> !apache doc.png|width=326,height=109!
> They are normal in Cloudera's doc:
> [https://docs.cloudera.com/documentation/enterprise/latest/topics/impala_udf.html#uda_functions]
> !cloudera doc.png|width=725,height=226!
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