Hibernate setMaxResults() not working for Sybase database query

Question

Either of the following two approaches to executing a simple Hibernate query with limited results do not work in Sybase. They both result in a SybSQLException: Incorrect syntax near '@p0'.

Query q = session.createQuery( "from Record" );
q.setMaxResults( 50 );
q.list();

or

Criteria criteria = session.createCriteria( Record.class );
criteria.setMaxResults( 50 );
criteria.list();

It appears the actual SQL generated in both of these cases looks like...

select top ? record_id, etc...

and Sybase is balking at the ?, which Hibernate is not filling in with the value 50 (this is my guess). I've searched everywhere and while others have encountered a similar error, it was not due to attempting to limit the results.

I can execute a direct SQL statement such as 'select top 50 from Record' and it works perfectly, so I know my version of Sybase supports the syntax.

I'm using Hibernate 3.2 and Sybase ASE 15.0.2

Answer 1

Perhaps you configured Hibernate to use a wrong SQL dialect.

It looks like HSQLDialect is the only dialect that can produce limit ? ?, and it's definitely a wrong choice for Sybase.

See also:

• 3.4.1. SQL Dialects

Answer 2

Try putting setFirstResult(1) as well like:

Criteria criteria = session.createCriteria(Record.class);
criteria.setFirstResult(1);
criteria.setMaxResults(50);
criteria.list();

Do you still get the same error?

Answer 3

setMaxResults() is typically used together with setFirstResult() to implement paging. Eg. the first query returns records 1 to 1000, the second query returns 1001 to 2000, and so on. Try using together.

setFetchSize() control how many rows are fetched at a time by the JDBC driver.(if implemented) So, if you for example have setMaxResults(1000) and setFetchSize(100) the query will return no more than 1000 rows, and will do so in batches of 100 rows at a time.

Answer 4

You can use createSQLQuery option which works with TOP.