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https://issues.apache.org/jira/browse/IMPALA-2019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Quanlong Huang resolved IMPALA-2019.
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Fix Version/s: Impala 4.1.0
Resolution: Fixed
Resolving this. String functions will have UTF-8 aware behaviors when query
option UTF8_MODE is set to true. They are
* lenght(), substring() and reverse()
* instr() and locate()
* mask functions, i.e. mask(), mask_fisrt_n(), mask_last_n(),
mask_show_first_n(), mask_show_last_n()
* case conversion functions, i.e. upper(), lower(), initcap()
> Proper UTF-8 support in string functions
> ----------------------------------------
>
> Key: IMPALA-2019
> URL: https://issues.apache.org/jira/browse/IMPALA-2019
> Project: IMPALA
> Issue Type: New Feature
> Components: Backend
> Affects Versions: Impala 2.1, Impala 2.2
> Reporter: Andrés Cordero
> Assignee: Quanlong Huang
> Priority: Critical
> Labels: sql-language
> Fix For: Impala 4.1.0
>
>
> As documented here:
> https://impala.apache.org/docs/build/html/topics/impala_string.html
> Impala does not properly handle non-ASCII UTF-8 characters, and will return
> results in string functions such as length that are inconsistent with Hive.
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