问题
According to the update on hsqldb.org listed here: http://hsqldb.org/web/features200.html
It now supports the mysql syntax ON DUPLICATE KEY in hsqldb 2.3.4, yet Im still getting sql errors when trying to run it. If im reading correctly I may need to set certain flags. But I cant find what to set to be able to use this synatx.
回答1:
MySQL compatibility is documented in the Guide http://hsqldb.org/doc/2.0/guide/compatibility-chapt.html#coc_compatibility_mysql
You need to execute SET DATABASE SQL SYNTAX MYS TRUE or the equivalent URL property sql.syntax_mys=true to enable it.
来源：https://stackoverflow.com/questions/42937669/how-to-use-on-duplicate-key-on-hsqldb-2-3-4