issues: 737855731

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association pull_request body repo type active_lock_reason performed_via_github_app
737855731 MDU6SXNzdWU3Mzc4NTU3MzE= 199 @db.register_function(..., replace=False) to avoid double-registering custom functions 9599 closed 0     1 2020-11-06T15:39:21Z 2020-11-06T18:30:44Z 2020-11-06T18:30:44Z OWNER  

I'd like a mechanism to optionally avoid registering a custom function if it has already been registered.

SQLite doesn't seem to offer a way to introspect registered custom functions so I'll need to track what has already been registered in sqlite-utils instead.

Should I register the custom rank_bm25 SQLite function for every connection, or should I register it against the connection just the first time the user attempts an FTS4 search? I think I'd rather register it only if it is needed.

_Originally posted by @simonw in https://github.com/simonw/sqlite-utils/issues/198#issuecomment-723145383_

140912432 issue    

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