Comments (6)
While thinking through whether or not dplyr should have append_to()
as an analog to copy_to()
I realised one absolute principle of dplyr is that it never mutates data in place - it always creates a copy with the modifications. That means that append_to()
is explicitly out of scope, and in general if you want to modify existing data you should be using DBI, not dplyr.
from db.rstudio.com.
Maybe we a Best Practice article called something like "Using dplyr
and DBI
with databases" could help with this. With an example, the article would show which function to use as the user progresses in the analysis. It would be an expanded version of the example in this RViews article: https://rviews.rstudio.com/2017/05/17/databases-using-r/
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Why would you be writing to a database table as part of an analysis?
from db.rstudio.com.
The example will start with a database that already has data we want to work with, as it is in most real cases. So, I see two scenarios we need to address:
-
The user has a small data set in R that they want to join to the data in the database
-
A query that results form
dplyr
code takes to long to re-run every time, so a temp table is needed
from db.rstudio.com.
Maybe instead of setting strict guidelines, we just do a comparison of methods between the two and leave it to the reader to decide. For example, I'm fairly certain that some users who want to do a select star will use dbgetquery even though there are many other ways to print a table.
from db.rstudio.com.
That's why I was thinking of an example. To me, this is a softer way to suggest a guideline that the user can take or leave.
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Related Issues (20)
- Links from Pro Drivers to Database Pages HOT 1
- Dbplyr MariaDB/MySQL window functions documentation update
- Disclaimer for pro driver licensing HOT 1
- Clarify keyring
- Update links to medics admin guides HOT 1
- Add snowflake
- Use pro drivers with pro products and open drivers with open products
- Add an article for using Python with the pro drivers
- Turn Preview Site for PRs
- db.rstudio.com site revamp/migration HOT 1
- Article Upgrade Pass HOT 1
- dbplyr Updates HOT 1
- Migrate to quarto
- Consider merging with solutions.rstudio.com
- WRONG REPO HOT 1
- Discuss when using specialized DBI backends is preferable to odbc
- 404 Error HOT 2
- Typo / garbled text on Professional Drivers Page
- Problem with connect db - Oracle ODBC IM006 ORA-12560 HOT 1
- Remove ROracle's lack of support
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