I am currently studying the support of the FOR UPDATE clause in
various RDBMS:

- Most RDBMS (not SQL Server, SQLite) support a plain FOR UPDATE
clause.
- DB2, Derby, HSQLDB, Ingres, Oracle, Sybase support FOR UPDATE OF
[field-list].
- HSQLDB, Postgres, Sybase support FOR UPDATE OF [table-list].

I have tried all of the above clauses with H2, and they all seem to
form valid syntax and they all run (I haven't checked actual locking
behaviour). Are those clauses officially supported by H2? Only plain
FOR UPDATE is documented here:

http://www.h2database.com/html/grammar.html#select

Cheers
Lukas

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