as.environment: Evaluate expressions within the context of a database table...

In greenplum-db/GreenplumR: A Fast, Easy-to-Use Tool for Manipulating Tables in Databases

Evaluate expressions within the context of a database table or view

Description

These functions allow a db.table or db.view object to be treated as an environment, in a manner analogous to data frames.

Usage

    ## S3 method for class 'db.obj'
as.environment(x, ...)
    ## S3 method for class 'db.obj'
with(data, expr, ...)

Arguments

x, data	A db.obj object to treat as an environment.
expr	For with, an R expression to evaluate in the context of a database table or view.
...	Other arguments; unused.

Value

For as.environment, the created environment. Note that no data is transferred to the client; all objects in the environment are queries pointing back to the host.

For with, a db.Rquery stored query object representing the expression. Use lk, lookat or as.data.frame to execute the query on the host and retrieve its contents.

Author(s)

Author: Hong Ooi, Pivotal Inc. [e-mail]

Maintainer: Frank McQuillan, Pivotal Inc. [e-mail]

See Also

as.environment

greenplum-db/GreenplumR documentation built on Sept. 2, 2023, 8:09 a.m.