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https://issues.apache.org/jira/browse/DRILL-4688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jinfeng Ni closed DRILL-4688.
-----------------------------
Resolution: Fixed
Fix Version/s: 1.7.0
Fixed in commit: 2e2b54af5379f7046e84390e70f3862cddd93195
> String functions may produce incorrect result when input has multi-byte
> character
> ---------------------------------------------------------------------------------
>
> Key: DRILL-4688
> URL: https://issues.apache.org/jira/browse/DRILL-4688
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Jinfeng Ni
> Priority: Critical
> Fix For: 1.7.0
>
>
> As discussed in DRILL-4573, the patch of DRILL-4573 would cause regression
> of query correctness, when the input, encoded as utf-8, contains multi-byte
> characters.
> For example,
> {code:sql}
> select regexp_matches('München', 'München') res3 from (values(1));
> +--------+
> | res3 |
> +--------+
> | false |
> +--------+
> {code}
> Here is the result before the patch of DRILL-4573.
>
> {code}
> select regexp_matches('München', 'München') res3 from (values(1));
> +-------+
> | res3 |
> +-------+
> | true |
> +-------+
> {code}
> Once this issue has been resolved, QA would add functional testcases to cover
> the case of multip-byte characters, so that we will be able to catch such
> regression in the first place in the future.
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