Nothing
## Test of bytea conversion with insert and retrieve to the db.
##
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=ifelse((p<-Sys.getenv("POSTGRES_PORT"))!="", p, 5432))
if (dbExistsTable(con, "texttable"))
dbRemoveTable(con, "texttable")
x_df <- data.frame(x = c("a", "ö", "漢字"), stringsAsFactors = FALSE)
dbGetQuery(con, "SHOW server_encoding")
dbGetQuery(con, "SET client_encoding = 'UTF8'")
dbGetQuery(con, "SHOW client_encoding")
# write with client_encoding = 'UTF8' and read back what was wrote
dbWriteTable(con, "texttable", x_df, overwrite = TRUE)
(x_db <- dbReadTable(con, "texttable"))
(e <- Encoding(x_db$x))
stopifnot( e[1] == "unknown" )
stopifnot( e[2] == "UTF-8" )
stopifnot( e[3] == "UTF-8" )
cat("GOOD -- all encoding are as expected\n")
x_df <- data.frame(x = c("a", "ö"), stringsAsFactors = FALSE)
dbWriteTable(con, "texttable", x_df, overwrite = TRUE)
dbGetQuery(con, "SET client_encoding = 'LATIN1'")
dbGetQuery(con, "SHOW client_encoding")
# read with client_encoding = 'LATIN1' what was already in the database
(x_db <- dbReadTable(con, "texttable"))
(e <- Encoding(x_db$x))
stopifnot( e[1] == "unknown" )
stopifnot( e[2] == "latin1" )
cat("GOOD -- all encoding are as expected\n")
# write with client_encoding = 'LATIN1' and read back what was wrote
dbWriteTable(con, "texttable", x_df, overwrite = TRUE)
(x_db <- dbReadTable(con, "texttable"))
(e <- Encoding(x_db$x))
stopifnot( e[1] == "unknown" )
stopifnot( e[2] == "latin1" )
cat("GOOD -- all encoding are as expected\n")
dbRemoveTable(con, "texttable")
dbDisconnect(con)
dbUnloadDriver(drv)
cat("DONE\n")
}else{
cat("Skip because envirinmental variables are not set to tell the connection params.\n")
}
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