[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3224) Invalid generated SQL for nested queries
Invalid generated SQL for nested queries
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Key: HHH-3224
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3224
Project: Hibernate3
Issue Type: Bug
Components: query-hql
Affects Versions: 3.2.6
Environment: MySQL
Reporter: Adam Dyga
I'm facing a problem with invalid generated SQL for nested queries.
I've the following class hierarchy (left only the most important fields for clarity):
//base class
class Asset {
String description; // <- field in base class
}
class ImageSet {
List<Wallpaper> wallpapers;
}
class Wallpaper extends Asset { // <- inherits from Asset
}
The HBM mappings:
<class name="com.company.Asset" table="Asset"
abstract="true">
<property name="description" column="description"
type="string" />
<id>...</id>
</class>
<class name="ImageSet" table="ImageSets">
<bag name="wallpapers" cascade="delete-orphan"
inverse="true"
table="Wallpapers">
<key column="imageSetId" />
<one-to-many class="com.company.Wallpaper" />
</bag>
</class>
<joined-subclass name="com.company.Wallpaper"
extends="com.company.Asset" table="Wallpapers">
<key column="id" />
<many-to-one name="imageSet" column="imageSetId"
class="com.company.ImageSet" />
</joined-subclass>
When I try to execute the following HQL query:
select distinct imageSet from ImageSet imageSet where (select count(*) from
imageSet.wallpapers w where w.description is not null) = size(imageSet.wallpapers)
I get the following SQL query:
select distinct imageset0_.id as id14_ from ImageSets imageset0_ where (select count(*)
from Wallpapers wallpapers1_ where imageset0_.id=wallpapers1_.imageSetId and
(wallpapers1_1_.description is not null)])=(select count(wallpapers2_.imageSetId) from
Wallpapers wallpapers2_ inner join Asset wallpapers2_1_ on
wallpapers2_.id=wallpapers2_1_.id where imageset0_.id=wallpapers2_.imageSetId)
The error message is
Unknown column 'wallpapers1_1_.description' in 'where clause'
which is right - note the missing wallpapers1_1_ alias which should be defined during
inner join of the Wallpapers table with the base Asset table in the first nested query -
just as it is done in the second nested query.
Full stack trace of any exception that occurs:
org.hibernate.exception.SQLGrammarException: could not execute query
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.loader.Loader.doList(Loader.java:2216)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
at org.hibernate.loader.Loader.list(Loader.java:2099)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:378)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
Caused by: com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: Unknown column
'wallpapers1_1_.description' in 'where clause'
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:936)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2870)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1573)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3176)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1153)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1266)
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