> On Mon, 28 Mar 2005, Mark Woodward wrote: > >>> Hi there, >>> >>> while learning inkscape I did a sketch of picture describing >>> history of relational databases. It's available from >>> http://mira.sai.msu.su/~megera/pgsql/ >> >> Is there a direct line from INGRES to Postgres? I was under the >> impression >> that Postgres is a "new" lineage started after INGRES sharing little or >> no >> code. > > No code sharing, but only Stonebraker and his ideas about extensibility, > objects and lessons learned after Ingres, so it's named Postgres.
I would indicate that differently, maybe a dash or dotted line? > > >> >> The line from Ingres through RDb, Oracle, to Informix seems to indicate >> a >> lineage. Is there one? Is Oracle based, in some way, on INGRES? >> > > No, line just crossing Oracle which bought Rdb/VMS. I'll adjust picture. > > >> IS there a relation between IBM System R and INGRES or is that just a >> placement issue? > > No, I placed them close to underline their importance for relational > databases. It is hard to imply relationships without also implying derivation. > >> >> What is the raltionship between System R and SQL and DB2? > > Sure. System R was a research project of IBM > SEQUEL is a language designed to work with data stored in System R. > SEQUEL was renamed to SQL then because there was existed trademark. > IBM developes SQL/DS database which then became DB2. > >> >> What does Agatha Christie have do do with anything? (Other than having >> Hecule investigate the death of SCO.) >> > > "elephants can remember" - elephant here is a keyword > > IIRC, it was this proposal for postgresql logo > http://www.pgsql.ru/db/mw/msg.html?mid=1238939 I loved the movie "Gross Point Blank" :-) > > We used jaguar(leopard) before (famous postgresql empowered). > I don't remember who was the first author of Elephant logo. I think the elephant logo is great. Between Elephants, penuins, open source is starting to look like a zoo. ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
