git.postgresql.org Git - postgresql.git/commitdiff

diff --git a/doc/src/sgml/release-9.0.sgml b/doc/src/sgml/release-9.0.sgml

index 31102a21b9e51d7836ba9a58097735450be826bf..7bfdf1419b09a33f20dc6bfacaf5d303df4ee2cd 100644 (file)

--- a/doc/src/sgml/release-9.0.sgml

+++ b/doc/src/sgml/release-9.0.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.54 2010年08月25日 19:41:38 momjian Exp $ -->

+<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.55 2010年09月01日 15:14:42 tgl Exp $ -->

<sect1 id="release-9-0">

<title>Release 9.0</title>

<listitem>

<para>

Correct calculations of <link

- linkend="functions-geometry-op-table"><quote>overlap</quote></link>

- and <quote>contains</quote> operations over polygons (Teodor Sigaev)

+ linkend="functions-geometry-op-table"><quote>overlaps</quote></link>

+ and <quote>contains</quote> operations for polygons (Teodor Sigaev)

+ </para>

+

+ <para>

+ The polygon <literal>&amp;&amp;</> (overlaps) operator formerly just

+ checked to see if the two polygons' bounding boxes overlapped. It now

+ does a more correct check. The polygon <literal>@&gt;</> and

+ <literal>&lt;@</> (contains/contained by) operators formerly checked

+ to see if one polygon's vertexes were all contained in the other;

+ this can wrongly report <quote>true</> for some non-convex polygons.

+ Now they check that all line segments of one polygon are contained in

+ the other.

</para>

</listitem>