问题
THe HSQLDB changelog states that ROWNUM() was added in v2.2.0 which I am using without any problems when running integration tests against the in-memory HSQLDB.
However I want to run the same tests against a real Oracle 10g database, but the query fails because the pseudo-column is called ROWNUM. Is there an easy way write a single query string that works in both environments?
回答1:
The ROWNUM() function is available by default in HSQLDB 2.2.x and later. If you enable Oracle syntax compatibility mode, you can also use ROWNUM.
This statement enables it:
SET DATABASE SQL SYNTAX ORA TRUE
Or use the connection property sql.syntax_ora=true
来源：https://stackoverflow.com/questions/6612862/hsqldb-rownum-compatibility-with-oracle