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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))
if (dbExistsTable(con, "rockdata")) {
print("Removing rockdata\n")
dbRemoveTable(con, "rockdata")
}
cat("create incompatible table rockdata\n")
dbGetQuery(con, "CREATE TABLE rockdata (a int, b varchar(5))")
cat("write table to rockdata with append=TRUE\n")
try({res <-dbWriteTable(con, 'rockdata', rock, append=TRUE, overwrite=FALSE)
print(res)
if(res == FALSE){
cat("PASS as the return value is false\n")
}else{
cat("FAIL as the return value is true\n")
}
})
cat("write table to rockdata\n")
try({res <- dbWriteTable(con, 'rockdata', rock)
if(res == FALSE){
print(res)
cat("PASS as the return value is false\n")
}else{
cat("FAIL as the return value is true\n")
}
})
## run a simple query and show the query result
res <- dbGetQuery(con, "select * from rockdata limit 10")
print(res)
## cleanup
if (dbExistsTable(con, "rockdata")) {
print("Removing rockdata\n")
dbRemoveTable(con, "rockdata")
}
## and disconnect
dbDisconnect(con)
}
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