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ITS#7594 more for subDB cursor fix

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This commit is contained in:
Howard Chu 2013-06-05 16:13:43 -07:00
parent 3b623d66e1
commit aff123ba11
1 changed files with 10 additions and 0 deletions
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10
libraries/liblmdb/mdb.c
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@ -5413,8 +5413,18 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags)
void *db = NODEDATA(leaf);
memcpy(db, &mc->mc_xcursor->mx_db, sizeof(MDB_db));
} else {
MDB_cursor *m2;
/* shrink fake page */
mdb_node_shrink(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
mc->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf);
/* fix other sub-DB cursors pointed at this fake page */
for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) {
if (m2 == mc || m2->mc_snum < mc->mc_snum) continue;
if (m2->mc_pg[mc->mc_top] == mc->mc_pg[mc->mc_top] &&
m2->mc_ki[mc->mc_top] == mc->mc_ki[mc->mc_top])
m2->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf);
}
}
mc->mc_db->md_entries--;
return rc;