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https://issues.apache.org/jira/browse/DRILL-699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14034794#comment-14034794
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Jacques Nadeau commented on DRILL-699:
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fixed in 894037a or earlier
> Function resolutions fails to find functions in registry during the
> materialization due to case sensitive issues
> ----------------------------------------------------------------------------------------------------------------
>
> Key: DRILL-699
> URL: https://issues.apache.org/jira/browse/DRILL-699
> Project: Apache Drill
> Issue Type: Bug
> Components: Functions - Drill
> Reporter: Venki Korukanti
> Assignee: Venki Korukanti
> Fix For: 1.0.0-BETA1
>
> Attachments: DRILL-699-2.patch
>
>
> We maintain a Map<String, DrillFuncHolder> for functions that map the given
> function name to holder. Here the function name is added to map as it is
> given in FunctionTemplate without any case changes. The problem is after the
> Optiq-Drill conversion, all function names are converted to lowercase (in
> DrillOptiq.java). So if a function name is "isTrue" in the registry, we
> search for "istrue" and don't find any function during materialization.
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