R Under development (unstable) (2024-01-07 r85787 ucrt) -- "Unsuffered Consequences"
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> ## Test of data types, based on earlier version in inst/devTests
> ##
> ## Dirk Eddelbuettel, 21 Oct 2008
> 
> 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")
+     ## can't print result as it contains process id which changes  print(summary(drv))
+ 
+     ## 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, "tempostgrestable"))
+         dbRemoveTable(con, "tempostgrestable")
+ 
+     ## Test the numeric mapping
+     dbGetQuery(con, "create table tempostgrestable (intcolumn integer, floatcolumn float);")
+ 
+     i <- as.integer(10)
+     j <- as.numeric(56.6)
+ 
+     sql <- paste("insert into tempostgrestable ",
+                  "values (",i, "," ,j ,") ", sep="")
+     res <- dbGetQuery(con, sql)
+ 
+ 
+     dat <- dbReadTable(con, "tempostgrestable")
+     dbRemoveTable(con, "tempostgrestable")
+     cat("Read Numeric values\n")
+ 
+     ## now test the types of the colums we got
+     stopifnot( class(dat[,1]) == "integer" )
+     stopifnot( class(dat[,2]) == "numeric" )
+     cat("GOOD -- all numeric types are as expected\n")
+ 
+     ## and test the values
+     stopifnot( identical( dat[1,1], i))
+     stopifnot( identical( dat[1,2], j))
+     cat("GOOD -- all numeric values are as expected\n")
+ 
+     ## Test the logical mapping
+     if (dbExistsTable(con, "testlogical"))
+         dbRemoveTable(con, "testlogical")
+     dbGetQuery(con,"create table testlogical (col1 boolean, col2 boolean)")
+ 
+     i <- as.logical(TRUE)
+     j <- as.logical(FALSE)
+ 
+     sql <- paste("insert into testlogical ",
+                  "values (",i, "," ,j ,") ", sep="")
+     res <- dbGetQuery(con, sql);
+ 
+     dat <- dbReadTable(con, "testlogical")
+     dbRemoveTable(con, "testlogical")
+     cat("Read Logical values\n")
+ 
+     ## now test the types of the colums we got
+     stopifnot( class(dat[,1]) == "logical" )
+     stopifnot( class(dat[,2]) == "logical" )
+     cat("GOOD -- all logical types are as expected\n")
+ 
+     ## and test the values
+     stopifnot( identical( dat[1,1], i))
+     stopifnot( identical( dat[1,2], j))
+     cat("GOOD -- all logical values are as expected\n")
+ 
+     ## Test the character mapping
+     if (dbExistsTable(con, "testchar"))
+         dbRemoveTable(con, "testchar")
+     dbGetQuery(con,"create table testchar (code char(3),city varchar(20),country text);")
+ 
+     i <- as.character("IN")
+     j <- as.character("Hyderabad")
+     k <- as.character("India")
+ 
+     sql <- paste("insert into testchar ",
+                  "values ('",i,"' , '",j ,"' , '",k,"') ", sep="")
+     res <- dbGetQuery(con, sql);
+ 
+     dat <- dbReadTable(con, "testchar")
+     cat("Read Character values\n")
+ 
+     ## now test the types of the colums we got
+     stopifnot( class(dat[,1]) == "character" )
+     stopifnot( class(dat[,2]) == "character" )
+     stopifnot( class(dat[,3]) == "character" )
+     cat("GOOD -- all character types are as expected\n")
+ 
+     ## and test the values
+     ##stopifnot( identical( dat[1,1], i))
+     stopifnot( identical( dat[1,2], j))
+     stopifnot( identical( dat[1,3], k))
+     cat("GOOD -- all character values are as expected\n")
+ 
+     dbRemoveTable(con, "testchar")
+     dbRemoveTable(con, "tempostgrestable")
+ 
+     dbDisconnect(con)
+     dbUnloadDriver(drv)
+ 
+     cat("DONE\n")
+ }
> 
> proc.time()
   user  system elapsed 
   0.10    0.06    0.15