repair pg8000 changelogs; state that python 2 was dropped

Change-Id: I3970682d5d7bede56618d722d9068e3998bc6560
References: #7010

diff --git a/doc/build/changelog/changelog_14.rst b/doc/build/changelog/changelog_14.rst
index 586ab7b70f474f2a75389f02a218b040678e1076..b2d04da9f94ad156491dd06f273dd54b489ac688 100644 (file)
--- a/doc/build/changelog/changelog_14.rst
+++ b/doc/build/changelog/changelog_14.rst
@@ -4438,20 +4438,10 @@ This document details individual issue-level changes made throughout
         :tags: bug, postgresql
 
         The pg8000 dialect has been revised and modernized for the most recent
-        version of the pg8000 driver for PostgreSQL.  Changes to the dialect
-        include:
-
-        * All data types are now sent as text rather than binary.
-
-        * Using adapters, custom types can be plugged in to pg8000.
-
-        * Previously, named prepared statements were used for all statements.
-          Now unnamed prepared statements are used by default, and named
-          prepared statements can be used explicitly by calling the
-          Connection.prepare() method, which returns a PreparedStatement
-          object.
-
-        Pull request courtesy Tony Locke.
+        version of the pg8000 driver for PostgreSQL. Pull request courtesy Tony
+        Locke. Note that this necessarily pins pg8000 at 1.16.6 or greater,
+        which no longer has Python 2 support. Python 2 users who require pg8000
+        should ensure their requirements are pinned at ``SQLAlchemy<1.4``.
 
     .. change::
         :tags: bug, orm

diff --git a/doc/build/changelog/migration_14.rst b/doc/build/changelog/migration_14.rst
index ef0ca9b01a661d2dddd1ab232d40013181807b13..cca8c7e0e76c6ae4313a7f675fe98b4e0f492ed2 100644 (file)
--- a/doc/build/changelog/migration_14.rst
+++ b/doc/build/changelog/migration_14.rst
@@ -2627,6 +2627,19 @@ discriminator column::
 Dialect Changes
 ===============
 
+pg8000 minimum version is 1.16.6, supports Python 3 only
+--------------------------------------------------------
+
+Support for the pg8000 dialect has been dramatically improved, with help from
+the project's maintainer.
+
+Due to API changes, the pg8000 dialect now requires
+version 1.16.6 or greater. The pg8000 series has dropped Python 2 support as of
+the 1.13 series.  Python 2 users who require pg8000 should ensure their
+requirements are pinned at ``SQLAlchemy<1.4``.
+
+:ticket:`5451`
+
 psycopg2 version 2.7 or higher is required for the PostgreSQL psycopg2 dialect
 ------------------------------------------------------------------------------