R Under development (unstable) (2024-01-07 r85787 ucrt) -- "Unsuffered Consequences"
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> 
> ## createTableMixedCaseTest 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
> ##
> ## Neil Tiffin, 30 Oct 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))
+ 
+     ## 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=Sys.getenv("POSTGRES_PORT"))
+ 
+ 
+ 
+     res <- dbGetQuery(con, "create table Foo1 (f1 int)")
+     res <- dbGetQuery(con, "create table \"Foo2\" (f1 int)")
+ 
+     cat("Test should create foo1 and Foo2 tables\n")
+     ## res <- dbGetQuery(con, "SELECT * FROM information_schema.tables WHERE table_schema = 'public'")
+     ## print res
+ 
+     if (dbExistsTable(con, "Foo1")) {
+         cat("FAIL - Foo1 Table exists.\n")
+     }
+     else {
+         cat("Pass - Foo1 Table does not exist.\n")
+     }
+ 
+     if (dbExistsTable(con, "foo1")) {
+         cat("Pass - foo1 Table exists.\n")
+     }
+     else {
+         cat("FAIL - foo1 Table does not exist.\n")
+     }
+ 
+     if (dbExistsTable(con, "Foo2")) {
+         cat("Pass - Foo2 Table exists.\n")
+     }
+     else {
+         cat("FAIL - Foo2 Table does not exist.\n")
+     }
+ 
+     if (dbExistsTable(con, "foo2")) {
+         cat("FAIL - foo2 Table exists.\n")
+     }
+     else {
+         cat("Pass - foo2 Table does not exist.\n")
+     }
+ 
+     if (dbExistsTable(con, "\"Foo2\"")) {
+         cat("FAIL - \"Foo2\" Table exists.\n")
+     }
+     else {
+         cat("Pass - \"Foo2\" Table does not exist.\n")
+     }
+ 
+     if (dbExistsTable(con, "\"foo2\"")) {
+         cat("FAIL - \"foo2\" Table exists.\n")
+     }
+     else {
+         cat("Pass - \"foo2\" Table does not exist.\n")
+     }
+ 
+     res <- dbGetQuery(con, "drop table Foo1")
+     res <- dbGetQuery(con, "drop table \"Foo2\"")
+     ## and disconnect
+     dbDisconnect(con)
+ }
> 
> proc.time()
   user  system elapsed 
   0.12    0.04    0.15