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Pymills appears to have disappeared. Any chance you will update your macro?
Couldn't install this. Plugin. All of this worked ok:
pip install pymills easy_install TracSqlQueryMacro
[components] sqlquery.* = enabled [sqlquery] uri = postgres://user:password@hostname/database
But when trying to use it in a wiki page, I get "No macro or processor named 'SQL' found". Maybe because I'm using postgres?