From b6ac0cd90ac3bdd1c464dc3a1d304772769bb75b Mon Sep 17 00:00:00 2001 From: Hallvard Furuseth Date: Sat, 4 Jul 2015 13:48:02 +0200 Subject: [PATCH] mdb_drop0(): Omit scanning DUPSORT sub-DB leaves --- libraries/liblmdb/mdb.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c index 7cf5294..1de63e2 100644 --- a/libraries/liblmdb/mdb.c +++ b/libraries/liblmdb/mdb.c @@ -9470,8 +9470,10 @@ mdb_drop0(MDB_cursor *mc, int subs) MDB_cursor mx; unsigned int i; - /* LEAF2 pages have no nodes, cannot have sub-DBs */ - if (IS_LEAF2(mc->mc_pg[mc->mc_top])) + /* DUPSORT sub-DBs have no ovpages/DBs. Omit scanning leaves. + * This also avoids any P_LEAF2 pages, which have no nodes. + */ + if (mc->mc_flags & C_SUB) mdb_cursor_pop(mc); mdb_cursor_copy(mc, &mx); -- 2.7.4