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21 commits

Author SHA1 Message Date
Paul Ramsey 758c70c790 Fixed spelling mistake in header text. 
git-svn-id: http://svn.osgeo.org/postgis/trunk@529 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-04-28 22:26:02 +00:00
Sandro Santilli 06de6c418a Added calls to vacuum_delay_point() to give backend a chance of 
interrupting geometry stats computation.
Set default DEBUG_GEOMETRY_STATS to 0.


git-svn-id: http://svn.osgeo.org/postgis/trunk@488 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-03-15 17:07:05 +00:00
Sandro Santilli 8fe67f4636 Removed useless code blocks in histogram builder 
git-svn-id: http://svn.osgeo.org/postgis/trunk@480 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-03-09 00:21:02 +00:00
Sandro Santilli 4c6b5a4ad6 estimator applies a gain of AOI/cell_area on each cell it intersects (reverted to previous behaviour) 
git-svn-id: http://svn.osgeo.org/postgis/trunk@479 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-03-09 00:09:56 +00:00
Sandro Santilli d1b5a5262b postgis_gist_sel(): added warnings if search_box goes outside of histogram grid 
git-svn-id: http://svn.osgeo.org/postgis/trunk@462 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-03-04 13:50:45 +00:00
Sandro Santilli 497f1a8e81 The selectivity estimator does add the full value of each cell it overlaps, 
regardless of the actual overlapping area. Final gain is not applied
(formerly 1 / minimun between average feature cells occupation and
 search_box cells occupation)


git-svn-id: http://svn.osgeo.org/postgis/trunk@461 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-03-04 09:44:57 +00:00
Sandro Santilli d40c6739cf added check to keep selectivity value in the range of validity (suggested by m.cave) 
git-svn-id: http://svn.osgeo.org/postgis/trunk@460 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-03-03 21:59:48 +00:00
Sandro Santilli 8031bec86a histogram's boxesPerSide computed as a function of the column's statistic target 
git-svn-id: http://svn.osgeo.org/postgis/trunk@457 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-03-01 16:02:41 +00:00
Sandro Santilli 894f7054c0 bug fix in postgis_gist_sel (for PG75): SysCache is not released if not acquired 
git-svn-id: http://svn.osgeo.org/postgis/trunk@456 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-02-29 21:53:42 +00:00
Sandro Santilli 5517c8cab0 Fixed bugs reported by Mark Cave-Ayland <m.cave-ayland@webbased.co.uk>. 
Re-introduced previously removed estimate value incrementation by
the fractional part of each of the cells' value computed as the fraction
of overlapping area.


git-svn-id: http://svn.osgeo.org/postgis/trunk@453 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-02-26 16:42:59 +00:00
Sandro Santilli 937737f7ac Added handling for point features in histogram creation (add 1 instead of AOI/cell_area when AOI is 0). 
Fixed a wrong cast of BOX3D to BOX (called the convertion func).
Added some comments and an implementation on how to change evaluation
based on the average feature and search box cells occupation.


git-svn-id: http://svn.osgeo.org/postgis/trunk@451 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-02-25 12:00:32 +00:00
Sandro Santilli 90512cef28 initial version of && selectivity estimation for PG75 
git-svn-id: http://svn.osgeo.org/postgis/trunk@450 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-02-25 00:46:26 +00:00
Sandro Santilli 8985aab216 geometry analyzer builds the histogram 
git-svn-id: http://svn.osgeo.org/postgis/trunk@449 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-02-23 21:59:16 +00:00
Sandro Santilli f557a4cf46 added skeleton functions for pg75 stats integration 
git-svn-id: http://svn.osgeo.org/postgis/trunk@448 b70326c6-7e19-0410-871a-916f4a2858ee
 2004-02-23 12:18:55 +00:00
Sandro Santilli 7f6776e50a Added support for PG74 
git-svn-id: http://svn.osgeo.org/postgis/trunk@353 b70326c6-7e19-0410-871a-916f4a2858ee
 2003-11-11 10:14:57 +00:00
Paul Ramsey cd876cbd2e Moved Cygwin endian define out of source files into postgis.h common 
header file.


git-svn-id: http://svn.osgeo.org/postgis/trunk@280 b70326c6-7e19-0410-871a-916f4a2858ee
 2003-07-25 17:08:37 +00:00
Paul Ramsey d6f7f47e2d Added CVS revision headers. 
git-svn-id: http://svn.osgeo.org/postgis/trunk@278 b70326c6-7e19-0410-871a-916f4a2858ee
 2003-07-01 18:30:55 +00:00
David Blasby e1d087579d applied Mark Cave-Ayland's new patch that is a bit cleaner and has a 
user-defined FETCH limit for creating a histogram.


git-svn-id: http://svn.osgeo.org/postgis/trunk@232 b70326c6-7e19-0410-871a-916f4a2858ee
 2003-01-22 17:07:39 +00:00
David Blasby a8ca9583d6 added patch from Mark Cave-Ayland that saves memory during histogram 
calculations by using cursors instead of loading all the BOXs at once.


git-svn-id: http://svn.osgeo.org/postgis/trunk@231 b70326c6-7e19-0410-871a-916f4a2858ee
 2003-01-21 17:46:08 +00:00
David Blasby 3fd8a10c37 Added support to turn off the postgis_gist_sel() computations (see Makefile). 
git-svn-id: http://svn.osgeo.org/postgis/trunk@200 b70326c6-7e19-0410-871a-916f4a2858ee
 2002-10-16 20:33:45 +00:00
David Blasby 2a6741a9d2 New file with original estimation methods. 
git-svn-id: http://svn.osgeo.org/postgis/trunk@197 b70326c6-7e19-0410-871a-916f4a2858ee
 2002-10-11 22:52:31 +00:00