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https://issues.apache.org/jira/browse/SPARK-49018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot reassigned SPARK-49018:
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Assignee: Apache Spark
> Fix approx_count_distinct not working correctly with collation
> --------------------------------------------------------------
>
> Key: SPARK-49018
> URL: https://issues.apache.org/jira/browse/SPARK-49018
> Project: Spark
> Issue Type: Task
> Components: SQL
> Affects Versions: 4.0.0
> Reporter: Viktor Lučić
> Assignee: Apache Spark
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
>
> When running in spark-shell:
> {code:java}
> create table t(col string collate utf8_lcase)
> insert into t values 'a', 'a', 'A'
> select approx_count_distinct(col) from t {code}
> we get 2 as an answer, but it should be 1.
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