Chapter 67. BKI Backend Interface
Table of Contents
Backend Interface (BKI) files are scripts in a special language that is understood by the PostgreSQL backend when running in the “bootstrap” mode. The bootstrap mode allows system catalogs to be created and filled from scratch, whereas ordinary SQL commands require the catalogs to exist already. BKI files can therefore be used to create the database system in the first place. (And they are probably not useful for anything else.)
initdb uses a BKI file
to do part of its job when creating a new database cluster. The
input file used by initdb is created as
part of building and installing PostgreSQL
by a program named
genbki.pl, which reads some
specially formatted C header files in the
directory of the source tree. The created BKI file
postgres.bki and is
normally installed in the
share subdirectory of the installation tree.
Related information can be found in the documentation for initdb.