I think the right approach would be to store the sqlite database as a varlena type that can be TOASTed and then "expanded" using the Expanded Datum API so that

I think the right approach would be to store the sqlite database as a varlena type that can be TOASTed and then "expanded" using the Expanded Datum API so that it's a live open database connection for the life of the transaction: https://www.postgresql.org/docs/17/xtypes.html#XTYPES-TOAST https://www.postgresql.org/docs/17/xtypes.html#XTYPES-TOAST https://github.com/postgres/postgres/blob/master/src/include/utils/expandeddatum.h https://github.com/postgres/postgres/blob/master/src/include...