On 17 Říjen 2013, 5:32, Stephen Frost wrote: > Alvaro, > > * Alvaro Herrera (alvhe...@2ndquadrant.com) wrote: >> Tomas Vondra wrote: >> > Attached is the set of flow charts, showing the sequence of callbacks >> > for all the supported commands (i.e. SELECT, INSERT, UPDATE, DELETE, >> > ANALYZE). Wouldn't it be useful to put something like this into the >> > docs? I mean, the FDW API is not going to get any simpler, and for me >> > this was a significant help. >> >> Please see this thread >> http://www.postgresql.org/message-id/4bb9e69f.9080...@usit.uio.no > > The conclusion of that thread appears to be "use dia", which was done > here.. Am I missing something there (full disclosure- I haven't looked > at the dia yet)?
My impression from that thread was that one of the requirements is reasonable versioning / diff support, and AFAIK that's not a good match for any GUI-based product. So while I like dia and I used it for drawing the charts I submitted today, I don't think it works with this (quite reasonable) requirement. The only tool that might be a good match is graphviz (also mentioned in that thread). It's text-based, widely available and quite customizable. I'm not a graphviz expert, but attached is a result of 5-minute work with graphviz. Not perfect, but I'm pretty sure we could get much better / nicer results in very short time. It's easy to edit by hand, do versioning and /or diff on that, etc. I doubt there's a better option available. > Also, for my part, I'd suggest putting it on the wiki initially anyway, > as then it can be seen directly (load it as a png or what-have-you) and > it becomes immediately available to users. The .dia should also be on > the wiki, of course, and then included in the PG tree eventually if it's > added as part of the official docs. No problem with that, but I'd like to know in advance if we're willing to put that into the docs / under what requirements etc. Otherwise it might result in a major effort just to get it from wiki into docs later. Tomas
fdw.dot
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fdw.ps
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