# Db::set_errpfx

`

###

    #include <db_cxx.h>

    void Db::set_errpfx(const char *errpfx);

# Description

Set the prefix string that appears before error messages issued by Berkeley DB.

The Db::set_errpfx method does not copy the memory referenced by the errpfx argument, rather, it maintains a reference to it. This allows applications to modify the error message prefix at any time, without repeatedly calling Db::set_errpfx, but means that the memory must be maintained until the handle is closed.

For Db handles opened inside of Berkeley DB environments, calling the Db::set_errpfx method affects the entire environment and is equivalent to calling the DbEnv::set_errpfx method.

The Db::set_errpfx interface may be used to configure Berkeley DB at any time during the life of the application.

### Class

DbEnv

# See Also

DbEnv::close, DbEnv::open, DbEnv::remove, DbEnv::err, DbEnv::strerror, DbEnv::version, DbEnv::set_cachesize, DbEnv::set_errcall, DbEnv::set_errfile, DbEnv::set_error_stream, DbEnv::set_errpfx, DbEnv::set_flags, DbEnv::set_mutexlocks, DbEnv::set_paniccall, and DbEnv::set_verbose.`

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