Is there a way to directly get a data.table from database

General
,
1

I work mostly on data.table package in R. But everytime i query something from database. I have to use a setDT() command on it.

Is there any package or anyway I can directly get a data.table from database.

Any help any suggestions would do?

1 Like
2

Is that setDT() in a workflow that already uses rqdatatable?

3

Can we Query a database using rqdatatable. I read their website before posting it here. and It seems like they are trying to query a datatable from R not a database.

If you have any simple example I would highly appreciate it.

4

You could write a wrapper function. For example, if you've been using dbGetQuery() from the DBI package:

dbGetQueryDT <- function(conn, statement, ...) {
  res <- DBI::dbGetQuery(conn, statement, ...)
  setDT(res)
  res
}

Then just find/replace all instances of dbGetQuery with dbGetQueryDT.

2 Likes
5

Ah, I misunderstood. I think rquery is the more general package, and rquerydatatable is, as you said, for in-memory data.tables

1 Like
6

Thanks for answering my question. But I was looking for a direct way to get a data.table. Just wanted to know if that is possible.

When you are querying medium dataframe then setDT() is not efficient method on each query

7

Yes thanks for verifying my statement. I had doubts too...

:grin:

8

This topic was automatically closed 21 days after the last reply. New replies are no longer allowed.

If you have a query related to it or one of the replies, start a new topic and refer back with a link.