Before it sued Google for copying from Java, Oracle got rich copying IBM’s SQL Oracle's history highlights a possible downside to its stance on API copyrights.

ERROR o.h.e.jdbc.spi.SqlExceptionHelper - Table "BOOK" not found; SQL statement: insert into book (id, name, pages) values (null, ?, ?) #342 ...

Oracle配置wallfilter后，下面select case when语句报错 SELECT 1 FROM tableName WHERE 0 > ( SELECT CASE WHEN EXISTS ( SELECT 1 FROM dual ) THEN 1 WHEN 1 = 2 THEN 15 ELSE 1 END FROM dual ) 取消wall后，sql可正常执行。