Description Usage Arguments Value Examples
Executes a query on the server backend and returns data.
1 2 | query(resource, limit = -1, skip = 0, conditions = NULL, sort,
selectFields, distinct)
|
resource |
The resource to query. |
limit |
Limit the number of data rows to retrieve. If no specified, no limit applies. |
skip |
Skip the first N data rows to retrieve. If no specified, no skip=0 is assumed. |
conditions |
A set of conditions to constraint the query on the server side. Use the function |
sort |
Criteria to sort the data returned. (Not yet implemented) |
selectFields |
Select and filter the fields to retrieve (columns). (Not yet implemented) |
distinct |
Provides a distict criteria. (Not yet implemented) |
Returns a dataframe with the returned data.
1 2 3 4 5 6 7 | cnx <- connect('http://www.traitbase.info')
off <- resource(cnx, 'species')
res <- query(off)
query(off, conditions=buildCondition('species', '==', 'Bombus') )
query(off, limit=2, skip=0)
query(off, limit=2, skip=2)
|
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