RMySQL release candidate 0-7.0

On Mon, 17 Nov 2008, Paul Gilbert wrote:

Dirk Eddelbuettel wrote:

On 16 November 2008 at 11:26, Prof Brian Ripley wrote:
| 5) Uwe Ligges and I and Dirk Edelbuettel (as maintainer) have 
worked out a [ Almost:  s/Edel/Eddel/ ]

| way to have RPostgreSQL built on the main Windows package builder.  
We | could try to do the same here, but none of us are happy with 
distributing | a binary build that has no tests at all (as RMySQL 
runs no actual | examples).  So can we please have a test suite?  You 
will need to allow | the DBMS account, password and database name to 
be set via environment | variables, as for RPostgreSQL.

That was a leftover of me trying to get the Summer of Code whom I 
mentored
for RPostgreSQL student to write 'test-driven' code. Which didn't 
work so
well as he wrote code but few tests, but I ended up writing some 
tests for
him.  Kurt then had an issue with these tests running 
_un_conditionally and
hence upsettting CRAN tests (that have no backend) so between Uwe, 
Brian and
myself we came up with code where each file in tests/ starts as


----------------------------------------------------------------------------- 

if ((Sys.getenv("POSTGRES_USER") != "") &
    (Sys.getenv("POSTGRES_HOST") != "") &
    (Sys.getenv("POSTGRES_DATABASE") != "")) {

I've been setting this information in ~.pgpass (~/.my.cnf for MySQL) 
in Linux and understood it could be set in Windows 
%APPDATA%\postgresql\pgpass.conf and C:\my.cnf, although it may be 
machine specific rather than user specific in Windows.  I believe 
setting this way is considered more secure, although security may not 
be  the concern for package tests.  I assume this option was 
considered. Is there a complication that makes it difficult?

Yes, the DBMS account used for testing is not my own working account.

I really don't see giving that having the settings in your file is any 
more secure: they are even in a known place.  Note that I at least do 
not set a password this way.

Paul

    ## try to load our module and abort if this fails
    stopifnot(require(RPostgreSQL))

    ## load the PostgresSQL driver
    drv <- dbDriver("PostgreSQL")
    ## can't print result as it contains process id which changes 
print(summary(drv))

    ## connect to the default db
    con <- dbConnect(drv,
                     user=Sys.getenv("POSTGRES_USER"),
                     password=Sys.getenv("POSTGRES_PASSWD"),
                     host=Sys.getenv("POSTGRES_HOST"),
                     dbname=Sys.getenv("POSTGRES_DATABASE"))


    # tests follow below ...

----------------------------------------------------------------------------- 


which allowed Brian and Uwe to test on their end as well.  The actual 
tests
are creating (and the removing) tables and ensuring things come out as
identical() and/or same class() as the input.  I still need to add 
one for
transaction management.
 | 6) I've put a version of the revised sources I used to test on 
Windows | (and with updated documentation and unused files removed) at
| | http://www.stats.ox.ac.uk/pub/R/RMySQL_0.7-1.tar.gz
| | I tested MySQL 5.0.67 on Windows and 5.0.45 on Linux, and I think 
these | days we should only support MySQL 5.

As Debian maintainer for r-cran-rmysql I'd also be happy to test there.

Dirk

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