sqlite: initial handling for user defined functions

Michael Hoffmannrequested to merge
mhoffm/sqlite:mhoffm-initial-user-defined-functions into master

This PR adds handling for user defined functions. Initially only the xFunc parameter will be set, the others will come in subsequent PRs. A test for a 'regexp' udf was added to check that the query

"SELECT 'seafood' REGEXP 'foo.*'"

works as expected.

fixes #95 (closed)

Edited by Michael Hoffmann

Merge request reports