Invalid generated SQL for nested queries ---------------------------------------- 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) -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira