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https://issues.apache.org/jira/browse/SPARK-34876?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-34876:
------------------------------------
Assignee: Apache Spark
> Non-nullable aggregates can return NULL in a correlated subquery
> ----------------------------------------------------------------
>
> Key: SPARK-34876
> URL: https://issues.apache.org/jira/browse/SPARK-34876
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Tanel Kiis
> Assignee: Apache Spark
> Priority: Major
>
> Test case in scalar-subquery-select.sql:
> {code:title=query}
> SELECT t1a,
> (SELECT count(t2d) FROM t2 WHERE t2a = t1a) count_t2,
> (SELECT count_if(t2d > 0) FROM t2 WHERE t2a = t1a) count_if_t2,
> (SELECT approx_count_distinct(t2d) FROM t2 WHERE t2a = t1a)
> approx_count_distinct_t2,
> (SELECT collect_list(t2d) FROM t2 WHERE t2a = t1a) collect_list_t2,
> (SELECT collect_set(t2d) FROM t2 WHERE t2a = t1a) collect_set_t2,
> (SELECT hex(count_min_sketch(t2d, 0.5d, 0.5d, 1)) FROM t2 WHERE t2a =
> t1a) collect_set_t2
> FROM t1;
> {code}
> {code:title=Result}
> val1a 0 0 NULL NULL NULL NULL
> val1a 0 0 NULL NULL NULL NULL
> val1a 0 0 NULL NULL NULL NULL
> val1a 0 0 NULL NULL NULL NULL
> val1b 6 6 3 [19,119,319,19,19,19] [19,119,319]
> 0000000100000000000000060000000100000004000000005D8D6AB90000000000000000000000000000000400000000000000010000000000000001
> val1c 2 2 2 [219,19] [219,19]
> 0000000100000000000000020000000100000004000000005D8D6AB90000000000000000000000000000000100000000000000000000000000000001
> val1d 0 0 NULL NULL NULL NULL
> val1d 0 0 NULL NULL NULL NULL
> val1d 0 0 NULL NULL NULL NULL
> val1e 1 1 1 [19] [19]
> 0000000100000000000000010000000100000004000000005D8D6AB90000000000000000000000000000000100000000000000000000000000000000
> val1e 1 1 1 [19] [19]
> 0000000100000000000000010000000100000004000000005D8D6AB90000000000000000000000000000000100000000000000000000000000000000
> val1e 1 1 1 [19] [19]
> 0000000100000000000000010000000100000004000000005D8D6AB90000000000000000000000000000000100000000000000000000000000000000
> {code}
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