Robert Haas 516b87502d Do not hardcode PG_PROTOCOL_LATEST in NegotiateProtocolVersion
We shouldn't ask the client to use a protocol version later than the
one that they requested. To avoid that, if the client requests a
version newer than the latest one we support, set FrontendProtocol
to the latest version we support, not the requested version. Then,
use that value when building the NegotiateProtocolVersion message.
(It seems good on general principle to avoid setting FrontendProtocol
to a version we don't support, anyway.)

None of this really matters right now, because we only support a
single protocol version, but if that ever changes, we'll need this.

Jelte Fennema-Nio, reviewed by me and incorporating some of my
proposed wording

Discussion: https://postgr.es/m/CAGECzQTyXDNtMXdq2L-Wp=OvOCPa07r6+U_MGb==h90MrfT+fQ@mail.gmail.com
2024-08-15 10:44:15 -04:00

PostgreSQL Database Management System

This directory contains the source code distribution of the PostgreSQL database management system.

PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.

Copyright and license information can be found in the file COPYRIGHT.

General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.

The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.

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