Explicitly list the size as a numeric instead of integer.

Modified NEWS and DESCRIPTION files to include details pertaining to the PR.

Author: vlulla

DESCRIPTION

@@ -92,5 +92,6 @@ Authors@R: c(
   person("Ivan", "Krylov",         role="ctb"),
   person("Angel", "Feliz",         role="ctb"),
   person("Michael","Young",        role="ctb"),
-  person("Mark", "Seeto",          role="ctb")
+  person("Mark", "Seeto",          role="ctb"),
+  person("Vijay", "Lulla",         role="ctb")
   )

NEWS.md

@@ -105,6 +105,8 @@ rowwiseDT(
 
 10. `DT[1, on=NULL]` now works for returning the first row, [#6579](https://github.com/Rdatatable/data.table/issues/6579). Thanks to @Kodiologist for the report and @tdhock for the PR.
 
+11. `tables()` does not return NA as size for large data tables, [#6607](https://github.com/Rdatatable/data.table/issues/6607). Thanks to @vlulla for the report and the PR.
+
 ## NOTES
 
 1. Tests run again when some Suggests packages are missing, [#6411](https://github.com/Rdatatable/data.table/issues/6411). Thanks @aadler for the note and @MichaelChirico for the fix.

inst/tests/other.Rraw

@@ -771,5 +771,5 @@ if (loaded[["nanotime"]]) {
 .e <- new.env() ## to not populate the .GlobalEnv
 .e[["DT"]] <- as.data.table(lapply(1:15,function(i) runif(20e6)))
 res <- tables(env=.e)
-test(32, res[, .(NAME,NROW,NCOL,MB)], data.table(NAME="DT",NROW=20000000L,NCOL=15L,MB=2288))
+test(32, res[, .(NAME,NROW,NCOL,MB)], data.table(NAME="DT",NROW=20000000L,NCOL=15L,MB=2288.0))
 rm(.e, res)