Collaboration diagram for Write Flags:

Topics
	Copy Flags

Macros
#define	MDB_NOOVERWRITE 0x10
#define	MDB_NODUPDATA 0x20
#define	MDB_CURRENT 0x40
#define	MDB_RESERVE 0x10000
#define	MDB_APPEND 0x20000
#define	MDB_APPENDDUP 0x40000
#define	MDB_MULTIPLE 0x80000

Variables
size_t	MDB_val::mv_size
void *	MDB_val::mv_data
unsigned int	MDB_stat::ms_psize
unsigned int	MDB_stat::ms_depth
mdb_size_t	MDB_stat::ms_branch_pages
mdb_size_t	MDB_stat::ms_leaf_pages
mdb_size_t	MDB_stat::ms_overflow_pages
mdb_size_t	MDB_stat::ms_entries
void *	MDB_envinfo::me_mapaddr
mdb_size_t	MDB_envinfo::me_mapsize
mdb_size_t	MDB_envinfo::me_last_pgno
mdb_size_t	MDB_envinfo::me_last_txnid
unsigned int	MDB_envinfo::me_maxreaders
unsigned int	MDB_envinfo::me_numreaders

Detailed Description

LMDB Command Line Tools

The following describes the command line tools that are available for LMDB.

mdb_copy_1
mdb_dump_1
mdb_load_1
mdb_stat_1

Macro Definition Documentation

◆ MDB_APPEND

#define MDB_APPEND 0x20000

Data is being appended, don't split full pages.

◆ MDB_APPENDDUP

#define MDB_APPENDDUP 0x40000

Duplicate data is being appended, don't split full pages.

◆ MDB_CURRENT

#define MDB_CURRENT 0x40

For mdb_cursor_put: overwrite the current key/data pair

◆ MDB_MULTIPLE

#define MDB_MULTIPLE 0x80000

Store multiple data items in one call. Only for MDB_DUPFIXED.

◆ MDB_NODUPDATA

#define MDB_NODUPDATA 0x20

Only for MDB_DUPSORT
For put: don't write if the key and data pair already exist.
For mdb_cursor_del: remove all duplicate data items.

◆ MDB_NOOVERWRITE

#define MDB_NOOVERWRITE 0x10

For put: Don't write if the key already exists.

◆ MDB_RESERVE

#define MDB_RESERVE 0x10000

For put: Just reserve space for data, don't copy it. Return a pointer to the reserved space.

Variable Documentation

◆ me_last_pgno

mdb_size_t MDB_envinfo::me_last_pgno

ID of the last used page

◆ me_last_txnid

mdb_size_t MDB_envinfo::me_last_txnid

ID of the last committed transaction

◆ me_mapaddr

void* MDB_envinfo::me_mapaddr

Address of map, if fixed

◆ me_mapsize

mdb_size_t MDB_envinfo::me_mapsize

Size of the data memory map

◆ me_maxreaders

unsigned int MDB_envinfo::me_maxreaders

max reader slots in the environment

◆ me_numreaders

unsigned int MDB_envinfo::me_numreaders

max reader slots used in the environment

◆ ms_branch_pages

mdb_size_t MDB_stat::ms_branch_pages

Number of internal (non-leaf) pages

◆ ms_depth

unsigned int MDB_stat::ms_depth

Depth (height) of the B-tree

◆ ms_entries

mdb_size_t MDB_stat::ms_entries

Number of data items

◆ ms_leaf_pages

mdb_size_t MDB_stat::ms_leaf_pages

Number of leaf pages

◆ ms_overflow_pages

mdb_size_t MDB_stat::ms_overflow_pages

Number of overflow pages

◆ ms_psize

unsigned int MDB_stat::ms_psize

Size of a database page. This is currently the same for all databases.

◆ mv_data

void* MDB_val::mv_data

address of the data item

◆ mv_size

size_t MDB_val::mv_size

size of the data item

Topics

Macros

Variables