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From "Takeshi Yamamuro (Jira)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-30220) Support Filter expression uses IN/EXISTS predicate sub-queries
Date Sun, 29 Dec 2019 00:57:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-30220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Takeshi Yamamuro updated SPARK-30220:
-------------------------------------
    Parent Issue: SPARK-30374  (was: SPARK-27764)

> Support Filter expression uses IN/EXISTS predicate sub-queries
> --------------------------------------------------------------
>
>                 Key: SPARK-30220
>                 URL: https://issues.apache.org/jira/browse/SPARK-30220
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: jiaan.geng
>            Priority: Major
>
> Spark SQL cannot supports a SQL with nested aggregate as below:
>  
> {code:java}
> select sum(unique1) FILTER (WHERE
>  unique1 IN (SELECT unique1 FROM onek where unique1 < 100)) FROM tenk1;{code}
>  
> And Spark will throw exception as follows:
>  
> {code:java}
> org.apache.spark.sql.AnalysisException
> IN/EXISTS predicate sub-queries can only be used in Filter/Join and a few commands: Aggregate
[sum(cast(unique1#x as bigint)) AS sum(unique1)#xL]
> : +- Project [unique1#x]
> : +- Filter (unique1#x < 100)
> : +- SubqueryAlias `onek`
> : +- RelationV2[unique1#x, unique2#x, two#x, four#x, ten#x, twenty#x, hundred#x, thousand#x,
twothousand#x, fivethous#x, tenthous#x, odd#x, even#x, stringu1#x, stringu2#x, string4#x]
csv file:/home/xitong/code/gengjiaan/spark/sql/core/target/scala-2.12/test-classes/test-data/postgresql/onek.data
> +- SubqueryAlias `tenk1`
>  +- RelationV2[unique1#x, unique2#x, two#x, four#x, ten#x, twenty#x, hundred#x, thousand#x,
twothousand#x, fivethous#x, tenthous#x, odd#x, even#x, stringu1#x, stringu2#x, string4#x]
csv file:/home/xitong/code/gengjiaan/spark/sql/core/target/scala-2.12/test-classes/test-data/postgresql/tenk.data{code}
>  
> But PostgreSQL supports this syntax.
> {code:java}
> select sum(unique1) FILTER (WHERE
>  unique1 IN (SELECT unique1 FROM onek where unique1 < 100)) FROM tenk1;
>  sum 
> ------
>  4950
> (1 row){code}



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