Constant lmdb::NO_OVERWRITE
[−]
pub const NO_OVERWRITE: WriteFlags=
WriteFlags{bits: MDB_NOOVERWRITE,}
Insert the new item only if the key does not already appear in the database.
The function will return LmdbError::KeyExist
if the key already appears in the
database, even if the database supports duplicates (DUP_SORT
).