I adopted the "sqlcomp" plugin from Christoph Lang these days. He had no more time to maintain it.
I've updated many things and keep it as compatible as possible. Also i tried to implement all the comments in the discussion page and what i had developed over the time. In our Wiki i make heavy use of it.
Beneath many small changes it should get, the main thing is the ugly syntax. It currently uses the link-syntax:
[[connection|SQL]]
and i suggest to change it to something like
<sqlcomp connection options>SQL-Query</sqlcomp>
But this will break all pages using the old syntax. I also see no point in forking it to something like "sqlcomp2" oder "sqlcompxt".
For me, it is no problem to search&replace my pages, but what do YOU think?