Delete a key

Removes key and its value. Deleting a key that is not present is not an error; the return value says which happened.

Usage

mdbx_del(txn, key, db = NULL)

Arguments

txn

An mdbx_txn object from mdbx_txn_begin(), opened with write = TRUE.

key

A raw vector, or a single string, which is stored as its UTF-8 bytes.

db

An mdbx_dbi object from mdbx_dbi_open() naming a database to address instead of the unnamed main one, or NULL for the main database.

Value

TRUE if a record existed and was removed, FALSE otherwise. Returned invisibly.

See also

mdbx_get(), mdbx_put()

Examples

path <- tempfile(fileext = ".mdbx")
env <- mdbx_env_open(path)

mdbx_with_write(env, function(txn) {
  mdbx_put(txn, "k", "v")
  mdbx_del(txn, "k")
})

mdbx_env_close(env)
unlink(c(path, paste0(path, "-lck")))