The material looks great for “Oracle R”. So, I thought I’d get a few books and try a quick lab for myself.
The books covered data loading, data manipulation, statics stuff I’ve either forgotten or never learned, some plotting and a host of other useful stuff to be discovered.
So to focus my learning and usefulness I quickly eliminated data loading and data manipulation since I have tons of data, and already have a rich pl/sql language to do that anyway. So maybe some data retrieval from the database and a plot.
At several of my recent clients auditing has been a top priority, so how about a pie chart showing the status of all users.
I’m using the default user “RQUSER” and played around with a few of the demos. So far I like the “RStudio” app.
 "DF1" "DF2" "IRIS" "IRIS_TABLE"
So, no visibility to dba_users, what I’d normally pick.
Create local maybe?
GRANT SELECT ANY TABLE TO rquser
create synonym users for sys.dba_users
And no luck, local synonyms don’t show up on the R tools. And I did grant select any table and no luck with ore.ls() either. So more reading.
How about creating a local table so I can move passed this and have some pie – charts.
create table users as select * from dba_users;
 “DF1” “DF2” “IRIS” “IRIS_TABLE” “USERS”
Now for my pie, I’d like to show a group by account status. Well I can’t directly.
and it shows my table correctly, but don’t see any clear functions to get there. I think they are there, but I just haven’t discovered them yet. I do see some good filtering, but I’m used to writing a good query and being done with it. So, moving on. Next plan, create a table with the right columns, need my pie.
create table users as select account_status, count(*) status_count from dba_users group by account_status;
 "DF1" "DF2" "IRIS" "IRIS_TABLE" "USERS"
1 LOCKED 3
2 OPEN 7
3 EXPIRED & LOCKED 7
Now for Pie:
Error in seq.int(x[i], x[i + 1], length.out = n) :
'length.out' must be a non-negative number
Oops, Houston we have a problem.
So what’s going on here?
Let’s try something different, using one of the more normal examples (without the Oracle part).
> slices <- c(3,7,7)
> lbls <- c("LOCKED","OPEN","EXPIRED & LOCKED")
So what’s up?
I know that Oracle uses Oracle uses data frames to store some of it’s objects and that the R packages are overloaded so let’s check the classes.
Trying the plot package:
That worked, adding values instead of labels for each number, I’m sure there’s a way to change that, but the important thing is that it accepted my values with no errors and produced a plot.
OK, well lots of learning, but no sweet pie. Too much for Christmas anyway.