## 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)
}