Hi all,
It seems that (at least) the postgresql bindings do not allow pure
binary data.
I have a simple table:
debug=# create table test (name bytea);
byteas seems to be the backing type on the DB side for bytestrings.
and then I run this:
import Database.HDBC.PostgreSQL
import Database.HDBC
import Data.ByteString
main = do
db <- connectPostgreSQL "dbname=debug"
stmt <- prepare db "INSERT INTO test (name) VALUES($1)"
execute stmt [toSql $ pack [0]]
execute stmt [toSql $ pack [65, 0, 66]]
commit db
What happens is that the inserted string is cut-off at the first NULL
value: the first row is empty, and the second row contains just "A".
http://www.postgresql.org/docs/8.4/static/datatype-binary.html says:
“When entering bytea values, octets of certain values must be escaped
(but all octet values can be escaped) when used as part of a string
literal in an SQL statement. In general, to escape an octet, convert it
into its three-digit octal value and precede it by two backslashes”, and
continues to list that NULL should be quoted as E'\\000'. However, I
find no such quoting in the HDCB.Postgresql sources.
Anyone else stumbled on this?
thanks,
iustin
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