X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/15b104f4ff4614aa78c01180b6a9b89dd5a1400f..99bf0a01eb15a458cdc829274df9dc6b3760af0e:/db/migrate/021_move_to_innodb.rb

diff --git a/db/migrate/021_move_to_innodb.rb b/db/migrate/021_move_to_innodb.rb
index 5be81b695..4dac8410c 100644
--- a/db/migrate/021_move_to_innodb.rb
+++ b/db/migrate/021_move_to_innodb.rb
@@ -1,6 +1,4 @@
-require "migrate"
-
-class MoveToInnodb < ActiveRecord::Migration[5.0]
+class MoveToInnodb < ActiveRecord::Migration[4.2]
   @conv_tables = %w[nodes ways way_tags way_nodes current_way_tags relation_members relations relation_tags current_relation_tags]
 
   @ver_tbl = %w[nodes ways relations]
@@ -11,17 +9,12 @@ class MoveToInnodb < ActiveRecord::Migration[5.0]
 
     @ver_tbl.each do |tbl|
       change_column tbl, "version", :bigint, :null => false
-    end
-
-    @ver_tbl.each do |tbl|
       add_column "current_#{tbl}", "version", :bigint, :null => false
-      # As the initial version of all nodes, ways and relations is 0, we set the
+      # As the initial version of all nodes, ways and relations is 0, we set tehe
       # current version to something less so that we can update the version in
       # batches of 10000
       tbl.classify.constantize.update_all(:version => -1)
-      while tbl.classify.constantize.where(:version => -1).count > 0
-        tbl.classify.constantize.update_all("version=(SELECT max(version) FROM #{tbl} WHERE #{tbl}.id = current_#{tbl}.id)", { :version => -1 }, { :limit => 10000 })
-      end
+      tbl.classify.constantize.update_all("version=(SELECT max(version) FROM #{tbl} WHERE #{tbl}.id = current_#{tbl}.id)", { :version => -1 }, { :limit => 10000 }) while tbl.classify.constantize.where(:version => -1).count.positive?
       # execute "UPDATE current_#{tbl} SET version = " +
       #  "(SELECT max(version) FROM #{tbl} WHERE #{tbl}.id = current_#{tbl}.id)"
       # The above update causes a MySQL error: