That is correct,
Re you additional question re PL/R or get data from Pg in plain R - I am not sure it will be that much faster inside PL/R...
I dont think there will be too much difference in execution time... Would be good to test it... and would be good to share results with us :)
Thanks,
Misa
2012/9/4 Aram Fingal
<fingal@multifactorial.com>On Sep 4, 2012, at 4:18 PM, Misa Simic wrote:
Inside PL/R you can take the same table as it is (unpivoted) as your data.frame and then pivot it inside R using reshape package,,, And then inside PL/R function do whatever you would like to do with data i.e export to whatever... - but you cant return it pivoted as result of Postgres function..
Okay, you just answered my question in reply to Joe Conway (crossed in the mail). So I could just use write.table() from R to save to disk or I might even have the PL/R procedure write a heatmap or PCA plot to disk, again without returning any rows to PostgreSQL.
-Aram