[postgis-tickets] [PostGIS] #3501: [raster] add raster constraint max extent exceeds array size limit

[PostGIS]

#3501: [raster] add raster constraint max extent exceeds array size limit
------------------------+---------------------------
  Reporter:  hypostase  |      Owner:  dustymugs
      Type:  defect     |     Status:  reopened
  Priority:  medium     |  Milestone:  PostGIS 2.2.3
 Component:  raster     |    Version:  2.2.x
Resolution:             |   Keywords:
------------------------+---------------------------

Comment (by avernar):

 I did some tests on my database.  I have 3 raster tables and ran each
 method on them.


 {{{
 Rows         st_extent  st_collect  st_union  st_memunion
 19,575,700   30:15      failed      failed    480:00+
  3,137,060    5:05      5:10        18:35     not tested
    379,320    0:15.9    0:15.9       0:43.9     15:00+
 }}}

 All times in minutes:seconds and are just for the first select to get the
 ewkt.  So in my case st_extent and st_collect are roughly the same,
 st_union is around 3x slower and st_memunion is ridiculously slow and were
 aborted at the times listed.

--
Ticket URL: <https://trac.osgeo.org/postgis/ticket/3501#comment:9>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.