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Minor improvements in descriptions of recent changes.
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<!--
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<!--
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$PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.319 2005/01/15 05:59:44 momjian Exp $
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$PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.320 2005/01/15 07:53:04 tgl Exp $
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-->
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-->
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<appendix id="release">
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<appendix id="release">
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@ -648,14 +648,18 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.319 2005/01/15 05:59:44 momjian
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<listitem>
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<listitem>
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<para>
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<para>
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Improve optimizer row estimates for non-<command>VACUUM</command>ed
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Improve optimizer rowcount estimates (Tom)
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tables (Tom)
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</para>
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</para>
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<para>
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<para>
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The system now uses the number of blocks in the table to estimate the
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Formerly the planner estimated table sizes using the values seen
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number of rows in the table if it has never been
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by the last <command>VACUUM</command> or <command>ANALYZE</command>,
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<command>VACUUM</command>ed or <command>ANALYZE</command>d.
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both as to physical table size (number of pages) and number of rows.
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Previously a fixed value was used in such cases.
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Now, the physical table size is obtained directly from the kernel,
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and the number of rows is estimated by multiplying the table size
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by the row density (rows per page) seen by the last
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<command>VACUUM</command> or <command>ANALYZE</command>. This should
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produce more reliable estimates in cases where the table size has
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changed significantly since the last housekeeping command.
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</para>
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</para>
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</listitem>
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</listitem>
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@ -1744,10 +1748,11 @@ $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.319 2005/01/15 05:59:44 momjian
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<listitem>
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<listitem>
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<para>
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<para>
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Allow PL/pgSQL to understand <command>ELSEIF</> (Neil)
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Accept <command>ELSEIF</> in PL/pgSQL (Neil)
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</para>
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</para>
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<para>
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<para>
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Previously PL/pgSQL only understood <command>ELSIF</>.
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Previously PL/pgSQL only allowed <command>ELSIF</>, but many people
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are accustomed to spelling this keyword <command>ELSEIF</>.
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</para>
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</para>
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</listitem>
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</listitem>
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