Handle bigint

[parisni]

Hey,

I had two surprises today:

1. bigint were not handle well by RPostgres (both pull & push). This lead to invisible error, and was difficult to debug eg: 8998329829898429834 -> 1878743324
2. When trying to modify the code, I learned that R do not handle int8. The usual solution is to cast them as character (https://www.r-bloggers.com/r-in-a-64-bit-world/)

Then find here the patch that handle postgresql bigint as strings.
BTW, dbWriteTable will create TEXT field.

My guess is this is inevitable.

[krlmlr]

Thanks. We'll offer better support for 64-bit integers in the future, leaving this open as a reference.

[krlmlr]

bigint handled now via bigint argument to dbConnect().