# Db::set_re_len

`

###

    #include <db_cxx.h>

    int
    Db::set_re_len(u_int32_t re_len);

# Description

For the Queue access method, specify that the records are of length re_len.

For the Recno access method, specify that the records are fixed-length, not byte delimited, and are of length re_len.

Any records added to the database that are less than re_len bytes long are automatically padded (see Db::set_re_pad for more information).

Any attempt to insert records into the database that are greater than re_len bytes long will cause the call to fail immediately and return an error.

The Db::set_re_len interface may only be used to configure Berkeley DB before the Db::open interface is called.

The Db::set_re_len method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.

# Errors

EINVAL
  An invalid flag value or parameter was specified.

  Called after Db::open was called.

### Class

Db

# See Also

Db::close, Db::cursor, Db::del, Db::err, Db::fd, Db::get, Db::get_byteswapped, Db::get_type, Db::join, Db::key_range, Db::open, Db::put, Db::remove, Db::set_bt_compare, Db::set_bt_minkey, Db::set_bt_prefix, Db::set_cachesize, Db::set_dup_compare, Db::set_errcall, Db::set_errfile, Db::set_errpfx, Db::set_flags, Db::set_h_ffactor, Db::set_h_hash, Db::set_h_nelem, Db::set_lorder, Db::set_malloc, Db::set_pagesize, Db::set_paniccall, Db::set_q_extentsize, Db::set_realloc, Db::set_re_delim, Db::set_re_len, Db::set_re_pad, Db::set_re_source, Db::stat, Db::sync, Db::upgrade and Db::verify.`

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