Can I add to an existing lazy database in R without having to recreate everything?

Question

I created a database "mydb" that when run with lazyLoad("mydb") import in the workspace the (big) data.frames X and Y. I created "mydb" putting X and Y in an environment e and using the command tools:::makeLazyLoadDB(e,"mydb")

Now I created a third data.frame Z (quite big as well).

How can I add it to "mydb" without having to recreate the lazy objects for X and Y as well?

Possibly relevant? stackoverflow.com/questions/14757668/…

C8H10N4O2
– C8H10N4O2

2015-05-20 17:03:27 +00:00
Commented May 20, 2015 at 17:03 — C8H10N4O2
– C8H10N4O2, Commented May 20, 2015 at 17:03

Prateek Kale · Accepted Answer · 2015-09-30 05:46:28Z

4

You need to save your workspace and try adding Dataframe Z into environment and again run tools:::makeLazyLoadDB(e,"mydb") , please find example below

e=new.env(parent=emptyenv());
e$x=10;
e$y=20;
tools:::makeLazyLoadDB(e,"mydb");
save.image();
lazyLoad("mydb");
e$z=40;
tools:::makeLazyLoadDB(e,"mydb");
save.image();
lazyLoad("mydb");

You can see your three Data frames x,y,z.

answered Sep 30, 2015 at 5:46

Prateek Kale

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1 Comment

lucacerone Over a year ago

Thanks Prateek, I actually had found your solution and forgot to add the answer!

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