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https://issues.apache.org/jira/browse/SPARK-34636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Kousuke Saruta updated SPARK-34636:
-----------------------------------
    Description: 
UnresolvedReference, AttributeReference and Alias which take qualifier don't 
quote qualified names properly.

One instance is reported in SPARK-34626.
Other instances are like as follows.

{code}
UnresolvedAttribute("a`b"::"c.d"::Nil).sql
a`b.`c.d` // should be `a``b`.`c.d`

AttributeReference("a.b", IntegerType)(qualifier = "c.d"::Nil)
c.d.`a.b` // should be `c.d`.`a.b`

Alias(AttributeReference("a", IntegerType)(), "b.c")(qualifier = "d.e"::Nil).sql
`a` AS d.e.`b.c` // should be `a` AS `d.e`.`b.c`
{code}

  was:
UnresolvedReference, AttributeReference and Alias which take qualifier don't 
quote qualified names properly.

One instance is reported in SPARK-34626.
Other instances are like as follows.

{code}
UnresolvedAttribute("a`b"::"c.d"::Nil).sql
a`b.`c.d` // should be `a``b`.`c.d`

AttributeReference("a.b", IntegerType)(qualifier = "c.d"::Nil)
c.d.`a.b` // should be `c.d`.`a.b`

Alias(AttributeReference("a", IntegerType)(), "b.c")(qualifier = "d.e"::Nil).sql
`a` AS d.e.`b.c` // should be `a` AS `d.e`.`b.c`


> sql method in UnresolvedAttribute, AttributeReference and Alias don't quote 
> qualified names properly.
> -----------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-34636
>                 URL: https://issues.apache.org/jira/browse/SPARK-34636
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.0.2, 3.2.0, 3.1.1
>            Reporter: Kousuke Saruta
>            Assignee: Kousuke Saruta
>            Priority: Major
>
> UnresolvedReference, AttributeReference and Alias which take qualifier don't 
> quote qualified names properly.
> One instance is reported in SPARK-34626.
> Other instances are like as follows.
> {code}
> UnresolvedAttribute("a`b"::"c.d"::Nil).sql
> a`b.`c.d` // should be `a``b`.`c.d`
> AttributeReference("a.b", IntegerType)(qualifier = "c.d"::Nil)
> c.d.`a.b` // should be `c.d`.`a.b`
> Alias(AttributeReference("a", IntegerType)(), "b.c")(qualifier = 
> "d.e"::Nil).sql
> `a` AS d.e.`b.c` // should be `a` AS `d.e`.`b.c`
> {code}



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