diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2010-09-01 15:14:42 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2010-09-01 15:14:42 +0000 |
| commit | 4ff6856cb1016c480aca125f30bd579df7535e15 (patch) | |
| tree | 7b00c787605e3c7cc592fe97a5a73943382d5755 /doc | |
| parent | e4b96380c34e21046aaca8961fe697c3131c3e65 (diff) | |
| download | postgresql-4ff6856cb1016c480aca125f30bd579df7535e15.tar.gz | |
Improve release notes' description of Teodor's fixes for polygon overlaps
and contains operators.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/src/sgml/release-9.0.sgml | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/doc/src/sgml/release-9.0.sgml b/doc/src/sgml/release-9.0.sgml index 31102a21b9..7bfdf1419b 100644 --- a/doc/src/sgml/release-9.0.sgml +++ b/doc/src/sgml/release-9.0.sgml @@ -1,4 +1,4 @@ -<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.54 2010/08/25 19:41:38 momjian Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.55 2010/09/01 15:14:42 tgl Exp $ --> <sect1 id="release-9-0"> <title>Release 9.0</title> @@ -1698,8 +1698,19 @@ <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>&&</> (overlaps) operator formerly just + checked to see if the two polygons' bounding boxes overlapped. It now + does a more correct check. The polygon <literal>@></> and + <literal><@</> (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> |