query-methods: Request data from data source

In datamart: Unified access to your data sources

Description

This generic function is the main interface to the data behind the Xdata layer. The first argument is the data object, the second argument is an identifier (type character), of the resource requested.

Usage

query(self, resource, ...)

## S4 method for signature 'Xdata,character'
query(self, resource, ...)

## S4 method for signature 'Xsparql,character'
query(self, resource, maxrows = NULL,
  interactive = FALSE, typeconv = TRUE, verbose = getOption("verbose"),
  ...)

## S4 method for signature 'InternalData,character'
query(self, resource, ...)

## S4 method for signature 'UrlData,character'
query(self, resource,
  verbose = getOption("verbose"), ...)

## S4 method for signature 'Mashup,character'
query(self, resource, verbose = TRUE, ...)

## S4 method for signature 'DirectoryLocation,character'
query(self, resource,
  verbose = getOption("verbose"), extract.fct = readLines, ...)

## S4 method for signature 'MemoryLocation2,character'
query(self, resource, ...)

## S4 method for signature 'SftpLocation,character'
query(self, resource,
  verbose = getOption("verbose"), ...)

## S4 method for signature 'Pastebin,character'
query(self, resource,
  verbose = getOption("verbose"), ...)

## S4 method for signature 'ResFunc,character'
query(self, resource,
  verbose = getOption("verbose"), ...)

## S4 method for signature 'WebLocation,character'
query(self, resource,
  verbose = getOption("verbose"), extract.fct = readLines, ...)

## S4 method for signature 'CsvData,character'
query(self, resource,
  verbose = getOption("verbose"), for.update = FALSE, ...)

## S4 method for signature 'GoogleOAuth2,character'
query(self, resource,
  curl = RCurl::getCurlHandle(), ...)

Arguments

self	an Xdata object
resource	an identifier of the resource requested. End-user usually provide character, developer use resource and dispatch on the type.
...	additional parameter
maxrows	(Xsparql) limit of lines to return (default NULL)
interactive	(Xsparql) if TRUE, display result in chunks (default FALSE)
typeconv	(Xsparql) if TRUE (default), convert numbers and dates
verbose	print diagnostic messages, default=FALSE
extract.fct	(DirectoryLocation) which function to use to read file (default readLines)
for.update	(CsvData) update before loading (default FALSE)
curl	(GoogleOAuth2) curl handle

Details

Depending on the data object, additional parameter can be provided.

datamart documentation built on May 2, 2019, 9:40 a.m.