Re: lmdb: is read operation permitted inside the write transaction?

Dmytro Milinevskyy wrote:

Hello,

this might be a trivial question for you but I didn't find anything in the documentation nor any mention in the examples.

Which examples did you look at? mtest.c (and others) all operate this way already.

Basically I need to have an opportunity to call mdb_get while in write transaction. The sequence is smth like:

• txn = mdb_txn_begin(flags=0)

for i in 0..x: - v = mdb_get(txn, i) - mdb_put(txn, x+i, v) - mdb_put(txn, i, v+1)

• mdb_txn_commit(txn)

Will it be always valid data?

Yes.