[
https://issues.apache.org/jira/browse/SPARK-33837?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Apache Spark reassigned SPARK-33837:
------------------------------------
Assignee: (was: Apache Spark)
> Correlated subquery field resolve bug when inner table has a field with the
> same name with outer table
> ------------------------------------------------------------------------------------------------------
>
> Key: SPARK-33837
> URL: https://issues.apache.org/jira/browse/SPARK-33837
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.3
> Reporter: Su Qilong
> Priority: Major
>
> For the following statements:
> {code:java}
> create table t1(id int, name string)
> create table id(key int, name string);
> select * from id where name in (select name from t1 where t1.id = id.key)
> {code}
> This query is supported by spark, but since table t1 also has an attribute
> named id, spark will raise an error like:
> {noformat}
> Can't extract value from id#83: need struct type but got int;
> {noformat}
> According to implementation in Spark's ResolveReference rule, the name
> resolving precedence is `db.table` => `table.attr` => `attr.innerfield`
> So here id.key should be resolved as table id's attribute, rather than the
> innerfield of the attribute of table t1
> The problem in this resolving bug lies in the subquery resolving. In
> ResolveSubquery rule, we first try to resolve subquery independently, and
> only when there're unresolved attribute in subquery, we try
> resolveOuterReferences.
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
