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R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.
R is a collaborative project with many contributors.
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Type 'demo()' for some demos, 'help()' for on-line help, or
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>
> ## dbWriteTable test
> ##
> ## 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
> ##
> ## Dirk Eddelbuettel, 10 Sep 2009
>
> ## 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))
+
+
+
+ a <- dbGetQuery(con, "CREATE TABLE foo (name text)")
+ b <- dbGetQuery(con, "INSERT INTO foo VALUES ('bar')")
+
+ ## run a simple query and show the query result
+ x <- dbSendQuery(con, "CREATE TEMPORARY TABLE xyz ON COMMIT DROP AS select * from foo limit 1; select * from xyz;")
+ res <- fetch(x, n=-1)
+ print(res)
+ a <- dbGetQuery(con, "DROP TABLE foo")
+
+
+ ## cleanup
+
+ ## and disconnect
+ dbDisconnect(con)
+ cat("PASS -- ended without segmentation fault\n")
+ }
Loading required package: RPostgreSQL
Loading required package: DBI
name
1 bar
PASS -- ended without segmentation fault
>
> proc.time()
user system elapsed
0.422 0.040 0.506
|
