# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 475 def initialize(connection, max) super @counter = 0 @cache = Hash.new { |h,pid| h[pid] = {} } end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 483 def [](key); cache[key]; end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 490 def []=(sql, key) while @max <= cache.size dealloc(cache.shift.last) end @counter += 1 cache[sql] = key end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 498 def clear cache.each_value do |stmt_key| dealloc stmt_key end cache.clear end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 505 def delete(sql_key) dealloc cache[sql_key] cache.delete sql_key end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 481 def each(&block); cache.each(&block); end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 482 def key?(key); cache.key?(key); end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 484 def length; cache.length; end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 486 def next_key "a#{@counter + 1}" end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 512 def cache @cache[Process.pid] end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 520 def connection_active? @connection.status == PGconn::CONNECTION_OK rescue PGError false end
# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 516 def dealloc(key) @connection.query "DEALLOCATE #{key}" if connection_active? end