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In SQLITE there is a possibility to relatively easily create User-Defined Functions and Aggregates in (extension) languages such as C, Perl, Python and others. Is there also such possibility using common-lisp as SQLITE language extension? I know there are libraries like cl-sqlite and plain-odbc but they don’t seem to offer this possibility.
When I wrote cl-sqlite, I hadn’t thought about user-defined functions.
But it’s actually pretty easy. It just takes to define callbacks, foreign functions and wrap them in lispy interface. I guess I’ll add this feature to cl-sqlite soon.