Comments on: Performing a LEFT OUTER JOIN using JPQL and JPA http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/ Because programming is depressing Thu, 05 Nov 2009 23:29:15 +0000 http://wordpress.com/ hourly 1 By: Michel Ganguin http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-1045 Michel Ganguin Thu, 05 Nov 2009 23:29:15 +0000 http://arsenalist.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-1045 I meant: SELECT * FROM nba_player p LEFT OUTER JOIN shoe_company s ON (p.shoecompany_id = s.id AND s.name <> ‘hiddencompany’) I meant:
SELECT * FROM nba_player p LEFT OUTER JOIN shoe_company s ON (p.shoecompany_id = s.id AND s.name <> ‘hiddencompany’)

]]> By: Michel Ganguin http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-1044 Michel Ganguin Thu, 05 Nov 2009 23:27:04 +0000 http://arsenalist.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-1044 Is it possible to make more complex joins with jpql? lets say there can be a hidden company: SELECT * FROM nba_player p LEFT OUTER JOIN shoe_company s ON (p.shoecompany_id = s.id AND s.name 'hiddencompany') but I still want to see all nba_player in the result, those with shoe_company 'hiddencompany' set to null. Is it possible to express this in jpql? Is it possible to make more complex joins with jpql? lets say there can be a hidden company:

SELECT * FROM nba_player p LEFT OUTER JOIN shoe_company s ON (p.shoecompany_id = s.id AND s.name ‘hiddencompany’)

but I still want to see all nba_player in the result, those with shoe_company ‘hiddencompany’ set to null.

Is it possible to express this in jpql?

]]> By: Salma Hanif http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-866 Salma Hanif Thu, 07 May 2009 07:26:56 +0000 http://arsenalist.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-866 org.hibernate.QueryException: could not resolve property: TicketStatus of: org.domain.supportadmin.entity.Tickets [select tList from org.domain.supportadmin.entity.Tickets tList join tList.TicketStatus tstatus where lower(tList.message) like '%%'or lower(tList.submitter) like '%%'or lower(tList.email) like '%%'or lower(tList.phone) like '%%'or lower(tList.owner) like '%%'] org.hibernate.QueryException: could not resolve property: TicketStatus of: org.domain.supportadmin.entity.Tickets [select tList from org.domain.supportadmin.entity.Tickets tList join tList.TicketStatus tstatus where lower(tList.message) like '%%'or lower(tList.submitter) like '%%'or lower(tList.email) like '%%'or lower(tList.phone) like '%%'or lower(tList.owner) like '%%']

]]> By: Salma Hanif http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-865 Salma Hanif Thu, 07 May 2009 07:24:59 +0000 http://arsenalist.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-865 This example is not working.I need to implement ManyToOne. Can anyone help me in this ? This example is not working.I need to implement ManyToOne. Can anyone help me in this ?

]]> By: Brandon http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-860 Brandon Thu, 16 Apr 2009 19:59:09 +0000 http://arsenalist.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-860 Have you tried <a>www.searchjava.org</a>? Is a Google custom search to refine the search. I found great results... Have you tried http://www.searchjava.org? Is a Google custom search to refine the search. I found great results…

]]> By: Michail http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-837 Michail Tue, 17 Feb 2009 08:39:25 +0000 http://arsenalist.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-837 The author writes: This sql query: "SELECT * FROM nba_player p, shoe_company s WHERE p.shoecompany_id = s.id or p.shoecompany_id IS NULL" is the same as this sql query: "SELECT * FROM nba_player p LEFT OUTER JOIN shoe_company s ON (p.shoecompany_id = s.id)". It is a mistake: the first query will repeat p (where shoecompany_id IS NULL) whith every company in show company dtable while the second query will generate only one record for such a player. The author writes:

This sql query:
“SELECT * FROM nba_player p, shoe_company s WHERE p.shoecompany_id = s.id or p.shoecompany_id IS NULL”

is the same as this sql query:
“SELECT * FROM nba_player p LEFT OUTER JOIN shoe_company s ON (p.shoecompany_id = s.id)”.

It is a mistake: the first query will repeat p (where shoecompany_id IS NULL) whith every company in show company dtable while the second query will generate only one record for such a player.

]]> By: [JPA] Join i warunek zczenia - Strona 2 | hilpers http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-830 [JPA] Join i warunek zczenia - Strona 2 | hilpers Sun, 18 Jan 2009 15:29:22 +0000 http://arsenalist.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-830 [...] [...] [...] [...]

]]> By: Sanjeev Kulkarni http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-805 Sanjeev Kulkarni Tue, 04 Nov 2008 04:48:43 +0000 http://arsenalist.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-805 Thanks a lot... Thanks a lot…

]]> By: Nate http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-514 Nate Fri, 18 Apr 2008 17:35:43 +0000 http://arsenalist.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-514 Thank you for the easy to follow example. My situation, however, is a bit more complex. I’m joining on dates and in the first table, the date is represented as an integer (yyyyMMdd) and in the second, as a date field. I’ve tried everything including using the getter/setter methods to convert the Date to a Long and back, but I always get a “java.sql.SQLException: [SQL0401] Comparison operator = operands not compatible.” as the SQL it generates seems to be be comparing the data types as they’re stored in the database and I’m not sure how to get JPA/Toplink to do otherwise. Thank you for the easy to follow example. My situation, however, is a bit more complex. I’m joining on dates and in the first table, the date is represented as an integer (yyyyMMdd) and in the second, as a date field.

I’ve tried everything including using the getter/setter methods to convert the Date to a Long and back, but I always get a “java.sql.SQLException: [SQL0401] Comparison operator = operands not compatible.” as the SQL it generates seems to be be comparing the data types as they’re stored in the database and I’m not sure how to get JPA/Toplink to do otherwise.

]]> By: Mike http://depressedprogrammer.wordpress.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-506 Mike Mon, 21 Jan 2008 02:34:50 +0000 http://arsenalist.com/2007/11/20/performing-a-left-outer-join-using-jpql-and-jpa/#comment-506 Great Left Outer Join Example, Thank you! Great Left Outer Join Example, Thank you!

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