How Real Is The Open Source Database Fever?
J. Misael G. points out a NewsForge article on recent moves by some database vendors to loudly release (some of) their products as open source, asking the vital question "How much open source beer are these newcomers bringing to the database bash, or are they simply coming in and asking where the cups are?" (Slashdot and NewsForge are both part of OSTG.)
Other than the obvious mySQL and PostgreSQL, I have tried two others... CA's Ingres and IBM's Cloudscape (which is an embedded DB).
Ingres was originally intended to compete with the likes of Oracle and MS SQL Server, but never had the power or client base. OpenSourcing Ingres looks like CA's attempt to beef up both in one shot. It's not a GPL license, just a chance to peek at the source and maybe help out. The interface that ships is very much like Oracle's.
Cloudscape is nice, but not even as powerful as PostgreSQL.
I think there is a huge market still untapped for open source DB's... especially RDBMS, but alas, large companies are (of course) slow to adopt.
Saying Android is a family of phones is akin to saying Linux is a family of PCs.