.TH "todo" 3 "Wed May 18 2016" "LMDB" \" -*- nroff -*-
.ad l
.nh
.SH NAME
todo \- Todo List 

.IP "\fBGlobal \fBMDB_rel_func\fP )(\fBMDB_val\fP *item, void *oldptr, void *newptr, void *relctx)\fP" 1c
This feature is currently unimplemented\&.  
.IP "\fBGlobal \fBmdb_set_relfunc\fP (\fBMDB_txn\fP *txn, MDB_dbi dbi, MDB_rel_func *rel)\fP" 1c
The relocation function is called whenever it is necessary to move the data of an item to a different position in the database (e\&.g\&. through tree balancing operations, shifts as a result of adds or deletes, etc\&.)\&. It is intended to allow address/position-dependent data items to be stored in a database in an environment opened with the \fBMDB_FIXEDMAP\fP option\&. Currently the relocation feature is unimplemented and setting this function has no effect\&. 
.PP
\fBParameters:\fP
.RS 4
\fItxn\fP A transaction handle returned by \fBmdb_txn_begin()\fP 
.br
\fIdbi\fP A database handle returned by \fBmdb_dbi_open()\fP 
.br
\fIrel\fP A \fBMDB_rel_func\fP function 
.RE
.PP
\fBReturns:\fP
.RS 4
A non-zero error value on failure and 0 on success\&. Some possible errors are: 
.RE
.PP
.PP