PivotalR (version 0.1.18.5)

names-methods: The Names of an object

Description

This function gives the names of a db.obj, which are the column names of a db.table or db.view. The names are returned as a list

Usage

# S4 method for db.obj
names(x)
# S4 method for db.obj
names(x) <- value

Arguments

x

A db.obj. The input data frame for which the column names are required.

value

An array of strings. New names to replace the names of x.

Value

Returns a string with the list of the column names of data frame. The names are ordered.

See Also

'>db.obj, '>db.data.frame, '>db.table, '>db.view, '>db.Rquery are the class hierarchy structure of this package.

Examples

# NOT RUN {
<!-- %% @test .port Database port number -->
<!-- %% @test .dbname Database name -->
## set up the database connection
## Assume that .port is port number and .dbname is the database name
cid <- db.connect(port = .port, dbname = .dbname, verbose = FALSE)

## create a table from the example data.frame "abalone"
delete("abalone", conn.id = cid)
x <- as.db.data.frame(abalone, "abalone", conn.id = cid, verbose = FALSE)
## preview of a table
lk(x, nrows = 10) # extract 10 rows of data

## get names of all columns
names(x)

db.disconnect(cid, verbose = FALSE)
# }