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https://issues.apache.org/jira/browse/SPARK-37131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17435120#comment-17435120
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Hyukjin Kwon commented on SPARK-37131:
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cc [~allisonwang-db] and [~cloud_fan] FYI
> Support use IN/EXISTS with subquery in Project/Aggregate
> --------------------------------------------------------
>
> Key: SPARK-37131
> URL: https://issues.apache.org/jira/browse/SPARK-37131
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Tongwei
> Priority: Major
>
> {code:java}
> CREATE TABLE tbl1 (col1 INT, col2 STRING) USING PARQUET;
> INSERT OVERWRITE TABLE tbl1 SELECT 0,1;
> CREATE TABLE tbl2 (c1 INT, c2 STRING) USING PARQUET;
> INSERT OVERWRITE TABLE tbl2 SELECT 0,2;
> case 1:
> select c1 in (select col1 from tbl1) from tbl2
> Error msg:
> IN/EXISTS predicate sub-queries can only be used in Filter/Join and a
> few commands: Project []
> case 2:
> select count(1), case when c1 in (select col1 from tbl1) then "A" else
> "B" end as tag from tbl2 group by case when c1 in (select col1 from tbl1)
> then "A" else "B" end
> Error msg:
> IN/EXISTS predicate sub-queries can only be used in Filter/Join and a
> few commands: Aggregate []
> {code}
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