<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >Release 7.4.22</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.6.4 Documentation" HREF="index.html"><LINK REL="UP" TITLE="Release Notes" HREF="release.html"><LINK REL="PREVIOUS" TITLE="Release 7.4.23" HREF="release-7-4-23.html"><LINK REL="NEXT" TITLE="Release 7.4.21" HREF="release-7-4-21.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-08-11T02:27:18"></HEAD ><BODY CLASS="SECT1" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="4" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.6.4 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="Release 7.4.23" HREF="release-7-4-23.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="release.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" >Appendix E. Release Notes</TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="Release 7.4.21" HREF="release-7-4-21.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="RELEASE-7-4-22" >E.250. Release 7.4.22</A ></H1 ><DIV CLASS="FORMALPARA" ><P ><B >Release date: </B >2008-09-22</P ></DIV ><P > This release contains a variety of fixes from 7.4.21. For information about new features in the 7.4 major release, see <A HREF="release-7-4.html" >Section E.272</A >. </P ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN173140" >E.250.1. Migration to Version 7.4.22</A ></H2 ><P > A dump/restore is not required for those running 7.4.X. However, if you are upgrading from a version earlier than 7.4.11, see <A HREF="release-7-4-11.html" >Section E.261</A >. </P ></DIV ><DIV CLASS="SECT2" ><H2 CLASS="SECT2" ><A NAME="AEN173144" >E.250.2. Changes</A ></H2 ><P ></P ><UL ><LI ><P > Fix datetime input functions to correctly detect integer overflow when running on a 64-bit platform (Tom) </P ></LI ><LI ><P > Improve performance of writing very long log messages to syslog (Tom) </P ></LI ><LI ><P > Fix bug in backwards scanning of a cursor on a <TT CLASS="LITERAL" >SELECT DISTINCT ON</TT > query (Tom) </P ></LI ><LI ><P > Fix planner to estimate that <TT CLASS="LITERAL" >GROUP BY</TT > expressions yielding boolean results always result in two groups, regardless of the expressions' contents (Tom) </P ><P > This is very substantially more accurate than the regular <TT CLASS="LITERAL" >GROUP BY</TT > estimate for certain boolean tests like <TT CLASS="REPLACEABLE" ><I >col</I ></TT > <TT CLASS="LITERAL" >IS NULL</TT >. </P ></LI ><LI ><P > Improve <SPAN CLASS="APPLICATION" >pg_dump</SPAN > and <SPAN CLASS="APPLICATION" >pg_restore</SPAN >'s error reporting after failure to send a SQL command (Tom) </P ></LI ></UL ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="release-7-4-23.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="release-7-4-21.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Release 7.4.23</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="release.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Release 7.4.21</TD ></TR ></TABLE ></DIV ></BODY ></HTML >