ITS#7219 fixup keysize in previous commit

diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c
index 6952d884e34753859682f0c704ca36f3f046a117..ffbfefc8ddac8fd97a1eb21da07d2828d0947f27 100644 (file)
--- a/libraries/libmdb/mdb.c
+++ b/libraries/libmdb/mdb.c
@@ -5057,7 +5057,7 @@ mdb_update_key(MDB_page *mp, indx_t indx, MDB_val *key)
        MDB_node                *node;
        char                    *base;
        size_t                   len;
-       int                      delta;
+       int                      delta, delta0;
        indx_t                   ptr, i, numkeys;
        DKBUF;
 
@@ -5077,7 +5077,11 @@ mdb_update_key(MDB_page *mp, indx_t indx, MDB_val *key)
        }
 #endif
 
-       delta = key->mv_size - node->mn_ksize;
+       delta0 = delta = key->mv_size - node->mn_ksize;
+
+       /* Must be 2-byte aligned. If new key is
+        * shorter by 1, the shift will be skipped.
+        */
        delta += (delta & 1);
        if (delta) {
                if (delta > 0 && SIZELEFT(mp) < delta) {
@@ -5097,9 +5101,12 @@ mdb_update_key(MDB_page *mp, indx_t indx, MDB_val *key)
                mp->mp_upper -= delta;
 
                node = NODEPTR(mp, indx);
-               node->mn_ksize = key->mv_size;
        }
 
+       /* But even if no shift was needed, update ksize */
+       if (delta0)
+               node->mn_ksize = key->mv_size;
+
        if (key->mv_size)
                memcpy(NODEKEY(node), key->mv_data, key->mv_size);