Full_Name: Hallvard B Furuseth Version: LMDB 0.9.17 OS: Linux x86_64 URL: Submission from: (NULL) (81.191.45.31) Submitted by: hallvard

mdb_put(,, key of non-F_DUPDATA node, old data, MDB_APPENDDUP) succeeds in an MDB_DUPSORT database. It should return MDB_KEYEXIST: It should not matter whether a lone item is inside a sub-DB/sub-page.

Fix:

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c index 96c859e..2b7cd6b 100644 --- a/libraries/liblmdb/mdb.c +++ b/libraries/liblmdb/mdb.c @@ -6483,3 +6483,3 @@ more: if (!dcmp(data, &olddata)) { - if (flags & MDB_NODUPDATA) + if (flags & (MDB_NODUPDATA|MDB_APPENDDUP)) return MDB_KEYEXIST;

Demo program:

#include "lmdb.h" #include <stdio.h> #include <stdlib.h> #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr) #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \ "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))

int main(void) { int rc; MDB_env *env; B_txtxn *txn; MDB_dbi dbi; MDB_val key = {2, "k"}, data = {2, "d"};

E(mdb_env_create(&env)); E(mdb_env_open(env, "./testdb", 0, 0664)); E(mdb_txn_begin(env, NULL, 0, &txn)); E(mdb_dbi_open(txn, NULL, MDB_DUPSORT, &dbi));%%0 E(mdb_drop(txn, dbi, 0));

E(mdb_put(txn, dbi, &key, &data, 0)); rc = mdb_put(txn, dbi, &key, &data, MDB_APPENDDUP); CHECK(rc == MDB_KEYEXIST, "MDB_APPENDDUP expected MDB_KEYEXIST");

mdb_txn_abort(txn); mdb_env_close(env); return 0; }