[R] RODBC sqlSave problem.

Prof Brian Ripley ripley at stats.ox.ac.uk
Wed Apr 2 09:54:36 CEST 2003

On Wed, 2 Apr 2003, Fredrik Karlsson wrote:

> Being new to both the postgres database, ODBC and the RODBC interface, I
> am somewhat confused by some of the problems I am experiencing trying to
> connect R to the database.

You would be: there is an extensive set of help pages, and you have not
looked up odbcConnect!

> Whai I am trying is basically the example part of the help file for the 
> sqlSave function:
> > library(RODBC)
> > odbcConnect("theodor") -> channel
> > data(USArrests)
> > sqlSave(channel, USArrests, verbose = TRUE)
> Query: CREATE TABLE USArrests  (rownames varchar(255)  ,Murder float8
> ,Assault int4  ,UrbanPop int4  ,Rape float8  )
> Error in sqlSave(channel, USArrests, verbose = TRUE) : 
>         [RODBC] ERROR: Could not SQLExecute
> When issuing this comamnd, a table is created in the specified database,
> with fields corresponding to names(USArrests), except in lower case, but 
> the fiels contain no data. 
> Does anyone know the reason for this? One of my guesses is that the
> table and field names are converted into lower cases by the database
> manager, which would result in an error due to  non-existent symbols
> when RODBC tries to inser the data.
> Is this a possibility? Does anyone know how to investigate this?

Read the help page!  odbcConnect has a `case' argument. There is even a
file tests.R with PostgreSQL examples in the distribution.

> I would, of course, be extremely greateful for all the help I can get.

I would be grateful if you would read the help pages before posting to

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