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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)
}
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