+require "migrate"
+
class MoveToInnodb < ActiveRecord::Migration
- @@conv_tables = ['nodes', 'ways', 'way_tags', 'way_nodes',
- 'current_way_tags', 'relation_members',
- 'relations', 'relation_tags', 'current_relation_tags']
+ @conv_tables = %w(nodes ways way_tags way_nodes current_way_tags relation_members relations relation_tags current_relation_tags)
- @@ver_tbl = ['nodes', 'ways', 'relations']
+ @ver_tbl = %w(nodes ways relations)
def self.up
- remove_index :current_way_tags, :name=> :current_way_tags_v_idx
- remove_index :current_relation_tags, :name=> :current_relation_tags_v_idx
-
- @@ver_tbl.each { |tbl|
- change_column tbl, "version", :bigint, :limit => 20, :null => false
- }
+ remove_index :current_way_tags, :name => :current_way_tags_v_idx
+ remove_index :current_relation_tags, :name => :current_relation_tags_v_idx
- @@conv_tables.each { |tbl|
- change_engine (tbl, "InnoDB")
- }
+ @ver_tbl.each do |tbl|
+ change_column tbl, "version", :bigint, :null => false
+ end
- @@ver_tbl.each { |tbl|
- add_column "current_#{tbl}", "version", :bigint, :limit => 20, :null => false
- # As the initial version of all nodes, ways and relations is 0, we set the
- # current version to something less so that we can update the version in
+ @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
+ # 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.count(:conditions => {:version => -1}) > 0
- 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.count(:conditions => { :version => -1 }) > 0
+ tbl.classify.constantize.update_all("version=(SELECT max(version) FROM #{tbl} WHERE #{tbl}.id = current_#{tbl}.id)", { :version => -1 }, { :limit => 10000 })
end
- # execute "UPDATE current_#{tbl} SET version = " +
+ # execute "UPDATE current_#{tbl} SET version = " +
# "(SELECT max(version) FROM #{tbl} WHERE #{tbl}.id = current_#{tbl}.id)"
- # The above update causes a MySQL error:
- # -- add_column("current_nodes", "version", :bigint, {:null=>false, :limit=>20})
- # -> 1410.9152s
- # -- execute("UPDATE current_nodes SET version = (SELECT max(version) FROM nodes WHERE nodes.id = current_nodes.id)")
- # rake aborted!
- # Mysql::Error: The total number of locks exceeds the lock table size: UPDATE current_nodes SET version = (SELECT max(version) FROM nodes WHERE nodes.id = current_nodes.id)
+ # The above update causes a MySQL error:
+ # -- add_column("current_nodes", "version", :bigint, {:null=>false, :limit=>20})
+ # -> 1410.9152s
+ # -- execute("UPDATE current_nodes SET version = (SELECT max(version) FROM nodes WHERE nodes.id = current_nodes.id)")
+ # rake aborted!
+ # Mysql::Error: The total number of locks exceeds the lock table size: UPDATE current_nodes SET version = (SELECT max(version) FROM nodes WHERE nodes.id = current_nodes.id)
- # The above rails version will take longer, however will no run out of locks
- }
+ # The above rails version will take longer, however will no run out of locks
+ end
end
def self.down
- raise IrreversibleMigration.new
+ fail ActiveRecord::IrreversibleMigration
end
end