Need help: when using c_get on secondary DB

Question

Dear experts,
I am using BDB 4.7 on Linux.
My DB configuration was created as shown below.
primary : btree with my own key-comparison callback
secondary btree associated to the primary DB with my own comparison callback.
Codes caused error looks like as following
ret = db_create(&primarydb, dbenv, 0)
primarydb->set_bt_compare(primarydb, primarydb_compare);
ret = db_create(&secondarydb, dbenv, 0)
secondarydb->set_bt_compare(secondarydb, secondarydb_compare);
ret = secondarydb->cursor(secondarydb,NULL, &cursor);
key.flags = DB_DBT_MALLOC;
data.flags = DB_DBT_MALLOC;
while (...) {
/* sorted scanning with NULL key */
ret = cursor->c_get(cursor, &key, &data, DB_NEXT);
My problem is, in some case, when calling "cursor->c_get(...)" ,
the primary db's compare function was called with NULL key data
even if I use the cursor on the secondary indices.
Any hint would be highly appreciated.
Best regards,
Tawan Won

Answer 1

Hi,
Would you be able to explain exactly what the problem is? Does your application crash, do you have a stack trace? Does the database verify okay?
Why do you call c_get with a null key?
Bogdan Coman