How to raise Exception in HSQLDB procedure or function

What I want to do is just raise a exception开发者_如何学Go in HSQL 2.0.

As in Oracle we can use : .... EXCEPTION WHEN OTHERS THEN raise_application_error(XXX) ....

After read HSQL official documentation and tried what I can imagine , I still didn't get a clue.

Is there anybody can give a suggestion ? Thanks!

See the SIGNAL statement in the Guide:

http://hsqldb.org/doc/2.0/guide/sqlroutines-chapt.html#src_psm_exceptions

Example:

SIGNAL SQLSTATE '45000';

HSQLDB follows the SQL Standard PSM syntax for procedures and functions. This syntax is also followed by DB2, therefore many DB2 examples can be used with HSQLDB.