Table of Contents
PostgreSQL has four primary documentation formats:
Plain text, for pre-installation information
HTML, for on-line browsing and reference
PDF, for printing
man pages, for quick reference.
Additionally, a number of plain-text README files can be found throughout the PostgreSQL source tree, documenting various implementation issues.
HTML documentation and man pages are part of a standard distribution and are installed by default. PDF format documentation is available separately for download.
Read the upstream documentation. For corrections, first check the current version.