Generic structure used for passing keys and data in and out of the database. More...
#include <lmdb.h>
Data Fields | |
size_t | mv_size |
void * | mv_data |
Generic structure used for passing keys and data in and out of the database.
Values returned from the database are valid only until a subsequent update operation, or the end of the transaction. Do not modify or free them, they commonly point into the database itself.
Key sizes must be between 1 and mdb_env_get_maxkeysize() inclusive. The same applies to data sizes in databases with the MDB_DUPSORT flag. Other data items can in theory be from 0 to 0xffffffff bytes long.
size_t MDB_val::mv_size |
size of the data item
void* MDB_val::mv_data |
address of the data item