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https://issues.apache.org/jira/browse/DRILL-8222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Turton updated DRILL-8222:
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Fix Version/s: 1.21.0
(was: 1.20.2)
> Wrong function's implementation of concat_delim
> -----------------------------------------------
>
> Key: DRILL-8222
> URL: https://issues.apache.org/jira/browse/DRILL-8222
> Project: Apache Drill
> Issue Type: Bug
> Components: Functions - Drill
> Affects Versions: 1.20.1
> Reporter: Xurenhe
> Priority: Major
> Fix For: 1.21.0
>
> Attachments: image-2022-05-11-19-07-28-586.png
>
>
> Current function implementation of `concat_delim` is wrong.
> {code:java}
> select concat_delim(',', 'a', null, 'b') as c {code}
> We may want the result of 'a,b', which ignore null value during executing.
>
> But, actual result is 'a,,b'.
> I found the similar function(concat_ws) in MySQL and Postgres, and the
> behavior is what I wish.
>
> ----
>
> {code:java}
> @Test
> public void testConcatDelimVarArgsWithNullValue() throws Exception {
> testBuilder()
> .sqlQuery("select concat_delim(',', 'a', null, 'b') as c")
> .unOrdered()
> .baselineColumns("c")
> .baselineValues("a,b")
> .go();
> }
> {code}
> !image-2022-05-11-19-07-28-586.png|width=576,height=218!
>
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