Question

I have a query like this

SELECT * from table1 t1,table2 t2, OUTER table3 t3

This works in Informix database but when I use it as Hsql then it is not able to find this
“OUTER” keyword only… How to do outer join in Hibernate?

Answer 1

HSQLDB supports Standard SQL syntax, which is different from your Informix syntax query. Some examples of this syntax:

SELECT * from table1 t1 NATURAL JOIN table2 t2 NATURAL LEFT OUTER JOIN table3 t3

SELECT * from table1 t1 JOIN table2 t2 ON (T1.X = T2.Y) LEFT OUTER JOIN table3 t3 ON (T2.Z = T3.X)

You should adapt your query to the Standard syntax.

The query you reported in comments is translated to Standard SQL this way:

SELECT distinct sd.student_id, ss.sports_id, sf.fee_desc FROM STUDENTDETAILS sd
JOIN STUDENTSPORTS ss ON ss.sports_id = sd.sports_id LEFT OUTER JOIN STUDENTFEES sf 
ON ??? 

Note you need a condition for the question marks. For example the id in STUDENTSFEES which needs to be equal to the id in STUDENTSSPORTS. sf.some_id = ss.some_id