[
https://issues.apache.org/jira/browse/DRILL-7677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17070969#comment-17070969
]
Vova Vysotskyi commented on DRILL-7677:
---------------------------------------
Actually, such methods that accept holders should be removed from UDFs code.
Please see DRILL-6075 for details.
> NPE in getStringFromVarCharHolder(NullableVarCharHolder)
> ---------------------------------------------------------
>
> Key: DRILL-7677
> URL: https://issues.apache.org/jira/browse/DRILL-7677
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Niels Basjes
> Priority: Major
>
> Assume you have a function ([like this
> one|https://github.com/apache/drill/blob/master/contrib/udfs/src/main/java/org/apache/drill/exec/udfs/UserAgentFunctions.java#L110])
> that has
> {code:java}
> @Param
> NullableVarCharHolder input;
> {code}
> and in the {code:java}eval(){code} function you do
> {code:java}String inputString =
> org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.getStringFromVarCharHolder(input);{code}
> When this function is called with the input actually being null the 'input'
> parameter is an instance of NullableVarCharHolder where isSet is 0 and buffer
> is null.
> The buffer being null causes an NPE in the call to
> getStringFromVarCharHolder(NullableVarCharHolder)
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
