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https://issues.apache.org/jira/browse/IMPALA-13750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17926474#comment-17926474
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Noemi Pap-Takacs commented on IMPALA-13750:
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Setting UTF8_MODE=true resolves the issue.
> UPPER doesn't uppercase special characters
> ------------------------------------------
>
> Key: IMPALA-13750
> URL: https://issues.apache.org/jira/browse/IMPALA-13750
> Project: IMPALA
> Issue Type: Bug
> Reporter: Noemi Pap-Takacs
> Priority: Minor
>
> Applying UPPER() uppercases only the latin-like strings/characters.
> For example:
> {noformat}
> SELECT UPPER('kürtőskalács')
> {noformat}
> returns:
> {noformat}
> KüRTőSKALáCS{noformat}
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