MDB_node *node;
MDB_page *mp;
- if (!mc->mc_snum) return;
+ if (!mc->mc_snum && !(mc->mc_flags & C_INITIALIZED)) return;
for (i=0; i<mc->mc_top; i++) {
mp = mc->mc_pg[i];
node = NODEPTR(mp, mc->mc_ki[i]);
}
assert(root > 1);
- if ((rc = mdb_page_get(mc->mc_txn, root, &mc->mc_pg[0])))
- return rc;
+ if (!mc->mc_pg[0] || mc->mc_pg[0]->mp_pgno != root)
+ if ((rc = mdb_page_get(mc->mc_txn, root, &mc->mc_pg[0])))
+ return rc;
mc->mc_snum = 1;
mc->mc_top = 0;
* was the one we wanted.
*/
mc->mc_ki[mc->mc_top] = 0;
- leaf = NODEPTR(mp, 0);
if (exactp)
*exactp = 1;
goto set1;
if (rc == 0) {
/* last node was the one we wanted */
mc->mc_ki[mc->mc_top] = nkeys-1;
- leaf = NODEPTR(mp, nkeys-1);
if (exactp)
*exactp = 1;
goto set1;
}
if (rc < 0) {
/* This is definitely the right page, skip search_page */
+ if (mp->mp_flags & P_LEAF2) {
+ nodekey.mv_data = LEAF2KEY(mp,
+ mc->mc_ki[mc->mc_top], nodekey.mv_size);
+ } else {
+ leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
+ MDB_SET_KEY(leaf, &nodekey);
+ }
+ rc = mc->mc_dbx->md_cmp(key, &nodekey);
+ if (rc == 0) {
+ /* current node was the one we wanted */
+ if (exactp)
+ *exactp = 1;
+ goto set1;
+ }
rc = 0;
goto set2;
}
if (node->mn_flags & F_SUBDATA) {
memcpy(&mx->mx_db, NODEDATA(node), sizeof(MDB_db));
+ mx->mx_cursor.mc_pg[0] = 0;
mx->mx_cursor.mc_snum = 0;
mx->mx_cursor.mc_flags = C_SUB;
} else {
mc->mc_dbflag = &txn->mt_dbflags[dbi];
mc->mc_snum = 0;
mc->mc_top = 0;
+ mc->mc_pg[0] = 0;
mc->mc_flags = 0;
if (txn->mt_dbs[dbi].md_flags & MDB_DUPSORT) {
assert(mx != NULL);
unsigned int nflags)
{
unsigned int flags;
- int rc = MDB_SUCCESS, ins_new = 0, new_root = 0, newpos = 1;
+ int rc = MDB_SUCCESS, ins_new = 0, new_root = 0, newpos = 1, did_split = 0;
indx_t newindx;
pgno_t pgno = 0;
unsigned int i, j, split_indx, nkeys, pmax;
nkeys = NUMKEYS(mp);
split_indx = (nkeys + 1) / 2;
+ if (newindx < split_indx)
+ newpos = 0;
if (IS_LEAF2(rp)) {
char *split, *ins;
if (SIZELEFT(mn.mc_pg[ptop]) < mdb_branch_size(mc->mc_txn->mt_env, &sepkey)) {
mn.mc_snum--;
mn.mc_top--;
+ did_split = 1;
rc = mdb_page_split(&mn, &sepkey, NULL, rp->mp_pgno, 0);
+ /* root split? */
+ if (mn.mc_snum == mc->mc_snum) {
+ mc->mc_pg[mc->mc_snum] = mc->mc_pg[mc->mc_top];
+ mc->mc_ki[mc->mc_snum] = mc->mc_ki[mc->mc_top];
+ mc->mc_pg[mc->mc_top] = mc->mc_pg[ptop];
+ mc->mc_ki[mc->mc_top] = mc->mc_ki[ptop];
+ mc->mc_snum++;
+ mc->mc_top++;
+ ptop++;
+ }
/* Right page might now have changed parent.
* Check if left page also changed parent.
*/
if (mn.mc_pg[ptop] != mc->mc_pg[ptop] &&
mc->mc_ki[ptop] >= NUMKEYS(mc->mc_pg[ptop])) {
- /* root split? */
- if (mn.mc_snum == mc->mc_snum) {
- mc->mc_pg[mc->mc_snum] = mc->mc_pg[mc->mc_top];
- mc->mc_ki[mc->mc_snum] = mc->mc_ki[mc->mc_top];
- mc->mc_ki[mc->mc_top] = mn.mc_ki[mc->mc_top] - 1;
- mc->mc_pg[mc->mc_top] = mn.mc_pg[mc->mc_top];
- for (i=0; i<mc->mc_top; i++) {
- mc->mc_pg[i] = mn.mc_pg[i];
- mc->mc_ki[i] = mn.mc_ki[i];
- }
- mc->mc_snum++;
- mc->mc_top++;
- ptop++;
- } else {
- for (i=0; i<ptop; i++)
- mc->mc_ki[i] = mn.mc_ki[i];
- mc->mc_pg[ptop] = mn.mc_pg[ptop];
- mc->mc_ki[ptop] = mn.mc_ki[ptop] - 1;
+ for (i=0; i<ptop; i++) {
+ mc->mc_pg[i] = mn.mc_pg[i];
+ mc->mc_ki[i] = mn.mc_ki[i];
}
+ mc->mc_pg[ptop] = mn.mc_pg[ptop];
+ mc->mc_ki[ptop] = mn.mc_ki[ptop] - 1;
}
} else {
mn.mc_top--;
/* Adjust other cursors pointing to mp */
MDB_cursor *m2, *m3;
MDB_dbi dbi = mc->mc_dbi;
+ int fixup = NUMKEYS(mp);
if (mc->mc_flags & C_SUB)
dbi--;
if (m3->mc_pg[mc->mc_top] == mp) {
if (m3->mc_ki[mc->mc_top] >= newindx && !(nflags & MDB_SPLIT_REPLACE))
m3->mc_ki[mc->mc_top]++;
- if (m3->mc_ki[mc->mc_top] >= split_indx) {
+ if (m3->mc_ki[mc->mc_top] >= fixup) {
m3->mc_pg[mc->mc_top] = rp;
- m3->mc_ki[mc->mc_top] -= split_indx;
- if ((nflags & MDB_SPLIT_REPLACE) && !newpos)
- m3->mc_ki[mc->mc_top]--;
+ m3->mc_ki[mc->mc_top] -= fixup;
m3->mc_ki[ptop] = mn.mc_ki[ptop];
}
- } else if (m3->mc_pg[ptop] == mc->mc_pg[ptop] &&
+ } else if (!did_split && m3->mc_pg[ptop] == mc->mc_pg[ptop] &&
m3->mc_ki[ptop] >= mc->mc_ki[ptop]) {
m3->mc_ki[ptop]++;
}