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#!/usr/bin/env r
usePG <- TRUE
if (usePG) {
cat("Using Pg\n")
tempdb <- "pgdatetime"
system(paste("createdb", tempdb)) # create a temp database
suppressMessages(library(RPostgreSQL))
drv <- dbDriver("PostgreSQL")
con <- dbConnect(drv, dbname=tempdb)
} else {
cat("Using SQLite\n")
tempdb <- "/tmp/tempdb.sqlite" # assumed to not exist
suppressMessages(library(RSQLite))
drv <- dbDriver("SQLite")
if (file.exists(tempdb))
unlink(tempdb)
con <- dbConnect(drv, tempdb)
}
sql <- "create table foo (i integer, r real, t text)"
res <- dbSendQuery(con, sql)
cat("Created table\n")
i <- as.integer(11)
r <- as.numeric(22.22)
txt <- as.character("blim blom")
sql <- paste("insert into foo ",
"values (",
i, ",",
r, ", '",
txt, "') ", sep="")
res <- dbSendQuery(con, sql)
cat("Wrote values\n")
df <- dbReadTable(con, "foo")
cat("Read values\n")
## now test the types of the colums we got
stopifnot( class(df[,1]) == "integer" )
stopifnot( class(df[,2]) == "numeric" )
stopifnot( class(df[,3]) == "character" )
cat("GOOD -- all types are as expected\n")
## and test the values
stopifnot( identical( df[1,1], i))
stopifnot( identical( df[1,2], r))
stopifnot( identical( df[1,3], txt))
cat("GOOD -- all values are as expected\n")
if (usePG) {
dbDisconnect(con)
dbUnloadDriver(drv)
system(paste("dropdb", tempdb))
} else {
dbDisconnect(con)
dbUnloadDriver(drv)
unlink(tempdb)
}
cat("DONE\n")
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