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Allow column names in area conditions to be qualified, and do so for

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the SWF queries which sometimes reference more than one table with
columns named latitude and longitude.
This commit is contained in:
Tom Hughes 2007-09-14 11:16:25 +00:00
parent ebef7b8009
commit 349413a520
3 changed files with 8 additions and 8 deletions
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4
app/controllers/swf_controller.rb
View file

@ -51,14 +51,14 @@ class SwfController < ApplicationController
" FROM gpx_files,gps_points "+
"WHERE gpx_files.id=gpx_id "+
" AND gpx_files.user_id=#{user.id} "+
" AND "+OSM.sql_for_area(ymin,xmin,ymax,xmax)+
" AND "+OSM.sql_for_area(ymin,xmin,ymax,xmax,"gps_points.")+
" AND (gps_points.timestamp IS NOT NULL) "+
"ORDER BY fileid DESC,ts "+
"LIMIT 10000"
else
sql="SELECT latitude*0.000001 AS lat,longitude*0.000001 AS lon,gpx_id AS fileid,UNIX_TIMESTAMP(timestamp) AS ts "+
" FROM gps_points "+
"WHERE "+OSM.sql_for_area(ymin,xmin,ymax,xmax)+
"WHERE "+OSM.sql_for_area(ymin,xmin,ymax,xmax,"gps_points.")+
" AND (gps_points.timestamp IS NOT NULL) "+
"ORDER BY fileid DESC,ts "+
"LIMIT 10000"

6
lib/osm.rb
View file

@ -412,13 +412,13 @@ module OSM
end
# Return an SQL fragment to select a given area of the globe
def self.sql_for_area(minlat, minlon, maxlat, maxlon)
tilesql = QuadTile.sql_for_area(minlat, minlon, maxlat, maxlon)
def self.sql_for_area(minlat, minlon, maxlat, maxlon, prefix = nil)
tilesql = QuadTile.sql_for_area(minlat, minlon, maxlat, maxlon, prefix)
minlat = (minlat * 1000000).round
minlon = (minlon * 1000000).round
maxlat = (maxlat * 1000000).round
maxlon = (maxlon * 1000000).round
return "#{tilesql} AND latitude BETWEEN #{minlat} AND #{maxlat} AND longitude BETWEEN #{minlon} AND #{maxlon}"
return "#{tilesql} AND #{prefix}latitude BETWEEN #{minlat} AND #{maxlat} AND #{prefix}longitude BETWEEN #{minlon} AND #{maxlon}"
end
end

6
lib/quad_tile.rb
View file

@ -41,7 +41,7 @@ module QuadTile
end
end
def self.sql_for_area(minlat, minlon, maxlat, maxlon)
def self.sql_for_area(minlat, minlon, maxlat, maxlon, prefix)
sql = Array.new
single = Array.new
@ -49,11 +49,11 @@ module QuadTile
if first == last
single.push(first)
else
sql.push("tile BETWEEN #{first} AND #{last}")
sql.push("#{prefix}tile BETWEEN #{first} AND #{last}")
end
end
sql.push("tile IN (#{single.join(',')})") if single.size > 0
sql.push("#{prefix}tile IN (#{single.join(',')})") if single.size > 0
return "( " + sql.join(" OR ") + " )"
end