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## dbExistsq test with schema name: reported as Issue 28 at
## http://code.google.com/p/rpostgresql/issues/detail?id=28
##
## 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, "rock.data")) {
cat("Removing rock'data\n")
dbRemoveTable(con, "rock.data")
}
dbWriteTable(con, "rock.data", rock)
## run a simple dbExists
cat("Does rock.data exist? \n")
res <- dbExistsTable(con, "rock.data")
if(res){
cat("PASS: true\n")
}else{
cat("FAIL: false\n")
}
##
cat("create schema testschema and change the search_path\n")
dbGetQuery(con, 'CREATE SCHEMA testschema')
dbGetQuery(con, 'SET search_path TO testschema')
cat("Does rock.data exist? \n")
res <- dbExistsTable(con, "rock.data")
if(res){
cat("FAIL: true despite search_path change\n")
}else{
cat("PASS: false as the search_path changed\n")
}
cat("Does testschema.\"rock.data\" exist? \n")
res <- dbExistsTable(con, c('testschema', "rock.data"))
if(res){
cat("FAIL: true despite testschema specified\n")
}else{
cat("PASS: false as the testschema specified\n")
}
cat("Does public.\"rock.data\" exist? \n")
res <- dbExistsTable(con, c('public', "rock.data"))
if(res){
cat("PASS: true despite search_path change\n")
}else{
cat("FAIL: false as the search_path changed\n")
}
cat("write in current schema\n")
dbWriteTable(con, "rock.data", rock)
cat("Does rock.data exist? \n")
res <- dbExistsTable(con, "rock.data")
if(res){
cat("PASS: true\n")
}else{
cat("FAIL: false\n")
}
## cleanup
dbGetQuery(con, 'DROP TABLE "public"."rock.data"')
dbGetQuery(con, 'DROP TABLE "testschema"."rock.data"')
dbGetQuery(con, 'DROP schema "testschema"')
## and disconnect
dbDisconnect(con)
}
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