
R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
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Platform: x86_64-pc-linux-gnu (64-bit)

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> ## dbGetQuery test with optional parameters
> ##
> ## Assumes that
> ##  a) PostgreSQL is running, and
> ##  b) the current user can connect
> ## both of which are not viable for release but suitable while we test
> 
> ## only run this if this env.var is set correctly
> if (Sys.getenv("POSTGRES_USER") != "" & Sys.getenv("POSTGRES_HOST") != "" & Sys.getenv("POSTGRES_DATABASE") != "") {
+ 
+     ## try to load our module and abort if this fails
+     stopifnot(require(RPostgreSQL))
+     stopifnot(require(datasets))
+ 
+     ## load the PostgresSQL driver
+     drv <- dbDriver("PostgreSQL")
+ 
+     ## connect to the default db
+     con <- dbConnect(drv,
+                      user=Sys.getenv("POSTGRES_USER"),
+                      password=Sys.getenv("POSTGRES_PASSWD"),
+                      host=Sys.getenv("POSTGRES_HOST"),
+                      dbname=Sys.getenv("POSTGRES_DATABASE"),
+                      port=ifelse((p<-Sys.getenv("POSTGRES_PORT"))!="", p, 5432))
+ 
+ 
+     if (dbExistsTable(con, "rockdata")) {
+         print("Removing rockdata\n")
+         dbRemoveTable(con, "rockdata")
+     }
+ 
+     dbWriteTable(con, "rockdata", rock)
+ 
+     ## run a simple query and show the query result
+     res <- dbGetQuery(con, "SELECT * FROM rockdata WHERE peri > $1 LIMIT 10", 4000)
+     print(res)
+     res <- dbGetQuery(con, "SELECT * FROM rockdata WHERE peri > $1 AND shape < $2 LIMIT $3", c(4000, 0.2, 10))
+     print(res)
+ 
+ 
+     ## cleanup
+     if (dbExistsTable(con, "rockdata")) {
+         print("Removing rockdata\n")
+         dbRemoveTable(con, "rockdata")
+     }
+ 
+     ## and disconnect
+     dbDisconnect(con)
+ }
Loading required package: RPostgreSQL
Loading required package: DBI
   row.names  area    peri    shape  perm
1          6  7979 4010.15 0.167045  17.1
2          7  9333 4345.75 0.189651  17.1
3          8  8209 4344.75 0.164127  17.1
4         11  9364 4480.05 0.150944 119.0
5         13 10651 4036.54 0.228595  82.4
6         17 10962 4608.66 0.204314  58.6
7         18 10743 4787.62 0.262727  58.6
8         19 11878 4864.22 0.200071  58.6
9         20  9867 4479.41 0.144810  58.6
10        22 11876 4353.14 0.291029 142.0
  row.names area    peri    shape  perm
1         6 7979 4010.15 0.167045  17.1
2         7 9333 4345.75 0.189651  17.1
3         8 8209 4344.75 0.164127  17.1
4        11 9364 4480.05 0.150944 119.0
5        20 9867 4479.41 0.144810  58.6
[1] "Removing rockdata\n"
[1] TRUE
> 
> proc.time()
   user  system elapsed 
  0.470   0.036   0.550 
