SQLightning was the initial project combining SQLite3 with an LMDB backend. It seemed to be more an experimental/Proof-of-Concept thing, and isn't maintained.
LumoSQL is an alternative project (maintained), providing a SQLite3 front end with various optional storage backends. One of which is LMDB.
Note - I'm not affiliated with either project, I just remembered they exist. :)
* https://github.com/LMDB/sqlightning
* https://github.com/LumoSQL/LumoSQL
SQLightning was the initial project combining SQLite3 with an LMDB backend. It seemed to be more an experimental/Proof-of-Concept thing, and isn't maintained.
LumoSQL is an alternative project (maintained), providing a SQLite3 front end with various optional storage backends. One of which is LMDB.
Note - I'm not affiliated with either project, I just remembered they exist. :)