R AE compilation

When working with R, compilation does not correspond to the typical process of creating machine code from source code, but rather preparing a user-provided source file to work with the R Adapter.

A tool that is dedicated to this purpose reads the R source file, checks whether the required objects exist, serializes these objects, and then writes the output to the Applications Directory. An input file is required for compile_ae. The R input file must contain a number of objects that are required by the R Adapter. Predefined object names have an nz. prefix that is internally removed when the serialization takes place, which is important for the nzLibrary for R client packages but not for processes on the server side. However, all objects present in the file are serialized and then available during the R AE execution.

The following table shows all the standard objects. The purpose for most of these objects is explained in the sections where extended functionality is described.

Table 1.
Object	Description
`nz.fun`	The main function object, this function is called when its AE is invoked.
`nz.shaper`	The shaper function object.
`nz.shaper.list`	A list defining the output signature, required when `nz.shaper` is not a function, but a `std` character value.
`nz.mode`	A character value that defines the working mode; the default value is `run`.
`nz.args`	A list of optional arguments for `nz.fun`.
`nz.cols`	Required in the `tapply` working mode.
`nz.init`, `nz.accum`, `nz.merge`, `nz.final`	Four functions that are required by user-defined aggregates (UDAs).