SELECT FOR UPDATE in hsqldb using hibernate

问题

When I run a query on hsqldb (1.8.0.7) in mem mode using hibernate (4.2.3.Final) I get the following exception

 java.sql.SQLException: Unexpected token: FOR in statement [SELECT *
 FROM MYTABLE where ID=? FOR UPDATE NOWAIT]     at
 org.hsqldb.jdbc.Util.throwError(Unknown Source)    at
 org.hsqldb.jdbc.jdbcPreparedStatement.<init>(Unknown Source)   at
 org.hsqldb.jdbc.jdbcConnection.prepareStatement(Unknown Source)    at 
 ...

does hsqldb support select from update?

回答1:

In the updatability section of the documentation for 2.3 states that it is somehow supported:

If the SQL qualifier, FOR UPDATE is used, then all the updatable columns of the result set become updatable.

But I haven't been able to find it in the doc for 1.8. I found some sites, like this, saying that SELECT FOR UPDATE is not supported in version 1.8.

No concurrent migration support (to make Flyway cluster-safe) with Hsql 1.8, as this version does not property support SELECT ... FOR UPDATE locking

回答2:

SELECT FOR UPDATE is fixed in HSQLDB 2.3.3.

However NOWAIT will be fixed as noted HSQLDB 2.3.3 NOWAIT

来源：https://stackoverflow.com/questions/18052406/select-for-update-in-hsqldb-using-hibernate