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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2010-09-01 15:14:48 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2010-09-01 15:14:48 +0000 |
| commit | 41c8287de0d3c8942aa4842fff4af41091e0d90e (patch) | |
| tree | 280efdbd89c0a994f94dfa7e63394fabcf8f493a | |
| parent | 9602630f40d13f17178d0b7846871b242204c574 (diff) | |
Improve release notes' description of Teodor's fixes for polygon overlaps
and contains operators.
| -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 20c0378a0dd..14761ba0a79 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 2.39.2.11 2010/08/25 19:41:51 momjian Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.39.2.12 2010/09/01 15:14:48 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> |