Constant lmdb::NO_DUP_DATA
[−]
pub const NO_DUP_DATA: WriteFlags=
WriteFlags{bits: MDB_NODUPDATA,}
Insert the new item only if it does not already appear in the database.
This flag may only be specified if the database was opened with DUP_SORT
.
The function will return LmdbError::KeyExist
if the item already appears in the
database.