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https://issues.apache.org/jira/browse/DRILL-3518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14704859#comment-14704859
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Kristine Hahn edited comment on DRILL-3518 at 8/20/15 1:19 PM:
---------------------------------------------------------------
Doc additions: Added points 1 and 2 to [Developing a Simple
Function|http://kristinehahn.github.io/drill/docs/developing-a-simple-function/].
{quote}
Keep the following requirements in mind:
* Annotate all data that a UDF uses.
* Fully qualify class references.
{quote}
Added points 4 and 5 to [Developing an Aggregate
Function|http://kristinehahn.github.io/drill/docs/developing-an-aggregate-function/].
{quote}
Keep the following guidelines in mind:
* Do not use complex @Workspace variables.
* You cannot allocate a Repeated* value or have a ComplexWriter in the
@Workspace.
{quote}
These additions, now on the staging site, will appear on the Apache site next
time we publish.
was (Author: krishahn):
Doc additions: Added points 1 and 2 to [Developing a Simple
Fumction|http://kristinehahn.github.io/drill/docs/developing-a-simple-function/].
{quote}
Keep the following requirements in mind:
* Annotate all data that a UDF uses.
* Fully qualify class references.
{quote}
Added points 4 and 5 to [Developing an Aggregate
Function|http://kristinehahn.github.io/drill/docs/developing-an-aggregate-function/].
{quote}
Keep the following guidelines in mind:
* Do not use complex @Workspace variables.
* You cannot allocate a Repeated* value or have a ComplexWriter in the
@Workspace.
{quote}
These additions will appear on Apache site next time we publish.
> Do a better job of providing conceptual overview to UDF creation
> ----------------------------------------------------------------
>
> Key: DRILL-3518
> URL: https://issues.apache.org/jira/browse/DRILL-3518
> Project: Apache Drill
> Issue Type: Sub-task
> Components: Documentation
> Reporter: Jacques Nadeau
>
> Since UDFs are effectively written in Java, people find it confusing when
> some Java features aren't supported. Let's try to do a better job of
> outlining the pitfalls.
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