.TH "mdb_put" 3 "Wed Aug 16 2023" "LMDB" \" -*- nroff -*-
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.SH NAME
mdb_put \- Write Flags
.SH SYNOPSIS
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.PP
.SS "Modules"

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.RI "\fBCopy Flags\fP"
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.SS "Macros"

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.RI "#define \fBMDB_NOOVERWRITE\fP   0x10"
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.RI "#define \fBMDB_NODUPDATA\fP   0x20"
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.RI "#define \fBMDB_CURRENT\fP   0x40"
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.RI "#define \fBMDB_RESERVE\fP   0x10000"
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.RI "#define \fBMDB_APPEND\fP   0x20000"
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.RI "#define \fBMDB_APPENDDUP\fP   0x40000"
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.RI "#define \fBMDB_MULTIPLE\fP   0x80000"
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.SS "Variables"

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.RI "size_t \fBMDB_val::mv_size\fP"
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.RI "void * \fBMDB_val::mv_data\fP"
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.RI "unsigned int \fBMDB_stat::ms_psize\fP"
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.RI "unsigned int \fBMDB_stat::ms_depth\fP"
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.RI "size_t \fBMDB_stat::ms_branch_pages\fP"
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.RI "size_t \fBMDB_stat::ms_leaf_pages\fP"
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.RI "size_t \fBMDB_stat::ms_overflow_pages\fP"
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.RI "size_t \fBMDB_stat::ms_entries\fP"
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.RI "void * \fBMDB_envinfo::me_mapaddr\fP"
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.RI "size_t \fBMDB_envinfo::me_mapsize\fP"
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.RI "size_t \fBMDB_envinfo::me_last_pgno\fP"
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.RI "size_t \fBMDB_envinfo::me_last_txnid\fP"
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.RI "unsigned int \fBMDB_envinfo::me_maxreaders\fP"
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.RI "unsigned int \fBMDB_envinfo::me_numreaders\fP"
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.SH "Detailed Description"
.PP 
LMDB Command Line Tools
The following describes the command line tools that are available for LMDB\&. 
.PD 0

.IP "\(bu" 2
\fBmdb_copy - environment copy tool\fP 
.IP "\(bu" 2
\fBmdb_dump - environment export tool\fP 
.IP "\(bu" 2
\fBmdb_load - environment import tool\fP 
.IP "\(bu" 2
\fBmdb_stat - environment status tool\fP 
.PP

.SH "Macro Definition Documentation"
.PP 
.SS "#define MDB_NOOVERWRITE   0x10"
For put: Don't write if the key already exists\&. 
.SS "#define MDB_NODUPDATA   0x20"
Only for \fBMDB_DUPSORT\fP
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 For put: don't write if the key and data pair already exist\&.
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 For mdb_cursor_del: remove all duplicate data items\&. 
.SS "#define MDB_CURRENT   0x40"
For mdb_cursor_put: overwrite the current key/data pair 
.SS "#define MDB_RESERVE   0x10000"
For put: Just reserve space for data, don't copy it\&. Return a pointer to the reserved space\&. 
.SS "#define MDB_APPEND   0x20000"
Data is being appended, don't split full pages\&. 
.SS "#define MDB_APPENDDUP   0x40000"
Duplicate data is being appended, don't split full pages\&. 
.SS "#define MDB_MULTIPLE   0x80000"
Store multiple data items in one call\&. Only for \fBMDB_DUPFIXED\fP\&. 
.SH "Variable Documentation"
.PP 
.SS "size_t MDB_val::mv_size"
size of the data item 
.SS "void* MDB_val::mv_data"
address of the data item 
.SS "unsigned int MDB_stat::ms_psize"
Size of a database page\&. This is currently the same for all databases\&. 
.SS "unsigned int MDB_stat::ms_depth"
Depth (height) of the B-tree 
.SS "size_t MDB_stat::ms_branch_pages"
Number of internal (non-leaf) pages 
.SS "size_t MDB_stat::ms_leaf_pages"
Number of leaf pages 
.SS "size_t MDB_stat::ms_overflow_pages"
Number of overflow pages 
.SS "size_t MDB_stat::ms_entries"
Number of data items 
.SS "void* MDB_envinfo::me_mapaddr"
Address of map, if fixed 
.SS "size_t MDB_envinfo::me_mapsize"
Size of the data memory map 
.SS "size_t MDB_envinfo::me_last_pgno"
ID of the last used page 
.SS "size_t MDB_envinfo::me_last_txnid"
ID of the last committed transaction 
.SS "unsigned int MDB_envinfo::me_maxreaders"
max reader slots in the environment 
.SS "unsigned int MDB_envinfo::me_numreaders"
max reader slots used in the environment 
.SH "Author"
.PP 
Generated automatically by Doxygen for LMDB from the source code\&.