DBT: Create DBT Structure

In hrbrmstr/RBerkeley: Oracle 'Berkeley DB' Interface for R

Description

Berkeley DB uses a C-level struct referred to as a DBT (short for Data Base Thang). This is represented in the R code as a list of class DBT. At present it is only used in db_get calls to allow for more advance operations such as partial record retrieval.

Usage

DBT(data = NULL, size = NULL, ulen = NULL, dlen = NULL, doff = NULL,
  flags = NULL)

Arguments

data	An R object of type ‘raw’.
size	The size (in bytes) of the data object. Must be integer or NULL.
ulen	The ulen attribute of DBT. Must be integer or NULL.
dlen	The dlen attribute of DBT. Used for partial get/put. Must be integer or NULL.
doff	The dlen attribute of DBT. Used for partial get/put. Must be integer or NULL.
flags	The flags to DBT. Must be 0 or a valid DBT flag.

Details

This interface to the underlying Berkeley DB DBT structure is currently experimental, and is only supported in limited places in RBerkeley.

Value

A DBT object.

Author(s)

Jeffrey A. Ryan

References

Official Oracle Documentation for DBT structs: http://docs.oracle.com/cd/E17076_04/html/gsg/C/cstructs.html

hrbrmstr/RBerkeley documentation built on May 17, 2019, 4:54 p.m.