Add migration for quadtiling of node tables.

diff --git a/db/migrate/006_tile_nodes.rb b/db/migrate/006_tile_nodes.rb
new file mode 100644 (file)
index 0000000..9624a01
--- /dev/null
+++ b/db/migrate/006_tile_nodes.rb
@@ -0,0 +1,114 @@
+class TileNodes < ActiveRecord::Migration
+  def self.upgrade_table(from_table, to_table)
+    execute <<-END_SQL
+    INSERT INTO #{to_table} (id, latitude, longitude, user_id, visible, tags, timestamp, tile)
+    SELECT id, ROUND(latitude * 10000000), ROUND(longitude * 10000000),
+           user_id, visible, tags, timestamp,
+           tile_for_point(CAST(ROUND(latitude * 10000000) AS UNSIGNED),
+                          CAST(ROUND(longitude * 10000000) AS UNSIGNED))
+    FROM #{from_table}
+    END_SQL
+  end
+
+  def self.downgrade_table(from_table, to_table)
+    execute <<-END_SQL
+    INSERT INTO #{to_table} (id, latitude, longitude, user_id, visible, tags, timestamp)
+    SELECT id, latitude / 10000000, longitude / 10000000,
+           user_id, visible, tags, timestamp
+    FROM #{from_table}
+    END_SQL
+  end
+
+  def self.up
+    rename_table "current_nodes", "current_nodes_v5"
+
+    create_table "current_nodes", innodb_table do |t|
+      t.column "id",        :bigint,   :limit => 64,                 :null => false
+      t.column "latitude",  :integer,                                :null => false
+      t.column "longitude", :integer,                                :null => false
+      t.column "user_id",   :bigint,   :limit => 20,                 :null => false
+      t.column "visible",   :boolean,                                :null => false
+      t.column "tags",      :text,                   :default => "", :null => false
+      t.column "timestamp", :datetime,                               :null => false
+      t.column "tile",      :integer,                                :null => false
+    end
+
+    add_primary_key "current_nodes", ["id"]
+    add_index "current_nodes", ["timestamp"], :name => "current_nodes_timestamp_idx"
+    add_index "current_nodes", ["tile"], :name => "current_nodes_tile_idx"
+
+    change_column "current_nodes", "id", :bigint, :limit => 64, :null => false, :options => "AUTO_INCREMENT"
+    change_column "current_nodes", "tile", :integer, :null => false, :unsigned => true
+
+    upgrade_table "current_nodes_v5", "current_nodes"
+
+    drop_table "current_nodes_v5"
+
+    rename_table "nodes", "nodes_v5"
+
+    create_table "nodes", myisam_table do |t|
+      t.column "id",        :bigint,   :limit => 64,                 :null => false
+      t.column "latitude",  :integer,                                :null => false
+      t.column "longitude", :integer,                                :null => false
+      t.column "user_id",   :bigint,   :limit => 20,                 :null => false
+      t.column "visible",   :boolean,                                :null => false
+      t.column "tags",      :text,                   :default => "", :null => false
+      t.column "timestamp", :datetime,                               :null => false
+      t.column "tile",      :integer,                                :null => false
+    end
+
+    add_index "nodes", ["id"], :name => "nodes_uid_idx"
+    add_index "nodes", ["timestamp"], :name => "nodes_timestamp_idx"
+    add_index "nodes", ["tile"], :name => "nodes_tile_idx"
+
+    change_column "nodes", "tile", :integer, :null => false, :unsigned => true
+
+    upgrade_table "nodes_v5", "nodes"
+
+    drop_table "nodes_v5"
+  end
+
+  def self.down
+    rename_table "current_nodes", "current_nodes_v6"
+
+    create_table "current_nodes", innodb_table do |t|
+      t.column "id",        :bigint,   :limit => 64,                 :null => false
+      t.column "latitude",  :double,                                 :null => false
+      t.column "longitude", :double,                                 :null => false
+      t.column "user_id",   :bigint,   :limit => 20,                 :null => false
+      t.column "visible",   :boolean,                                :null => false
+      t.column "tags",      :text,                   :default => "", :null => false
+      t.column "timestamp", :datetime,                               :null => false
+    end
+
+    add_primary_key "current_nodes", ["id"]
+    add_index "current_nodes", ["latitude", "longitude"], :name => "current_nodes_lat_lon_idx"
+    add_index "current_nodes", ["timestamp"], :name => "current_nodes_timestamp_idx"
+
+    change_column "current_nodes", "id", :bigint, :limit => 64, :null => false, :options => "AUTO_INCREMENT"
+
+    downgrade_table "current_nodes_v6", "current_nodes"
+
+    drop_table "current_nodes_v6"
+
+    rename_table "nodes", "nodes_v6"
+
+    create_table "nodes", myisam_table do |t|
+      t.column "id",        :bigint,   :limit => 64,                 :null => false
+      t.column "latitude",  :double,                                 :null => false
+      t.column "longitude", :double,                                 :null => false
+      t.column "user_id",   :bigint,   :limit => 20,                 :null => false
+      t.column "visible",   :boolean,                                :null => false
+      t.column "tags",      :text,                   :default => "", :null => false
+      t.column "timestamp", :datetime,                               :null => false
+    end
+
+    add_index "nodes", ["id"], :name => "nodes_uid_idx"
+    add_index "nodes", ["latitude", "longitude"], :name => "nodes_latlon_idx"
+    add_index "nodes", ["timestamp"], :name => "nodes_timestamp_idx"
+
+    downgrade_table "nodes_v6", "nodes"
+
+    drop_table "nodes_v6"
+  end
+end