=== 5.5.0 (2018-01-31)
* Make Database#copy_table in the postgres adapter handle errors that occur while processing rows (jeremyevans) (#1470)
* Cache results of changed_columns method in local variables in many places for better performance (jeremyevans)
* Make modification_detection plugin not break column change detection for new objects (jeremyevans) (#1468)
* Make pg_range extension set :ruby_default schema value for recognized range defaults (jeremyevans)
* Make pg_interval extension set :ruby_default schema value for recognized interval defaults (jeremyevans)
* Make pg_json extension set :callable_default schema value for empty json/jsonb array/hash defaults (jeremyevans)
* Make pg_inet extension set :ruby_default schema value for recognized inet/cidr defaults (jeremyevans)
* Make pg_hstore extension set :callable_default schema value for empty hstore defaults (jeremyevans)
* Make pg_array extension set :callable_default schema value for recognized empty array defaults (jeremyevans) (#1466)
* Make defaults_setter plugin prefer :callable_default db_schema values over :ruby_default db_schema values (jeremyevans)
* Add defaults_setter plugin :cache option for caching default values returned (jeremyevans)
* Freeze string values in hashes returned by Database#schema (jeremyevans)
=== 5.4.0 (2018-01-04)
* Enable fractional seconds in timestamps on DB2 (jeremyevans) (#1463)
* Don't attempt to insert a second time if insert_select runs a query that doesn't return results, which can happen when triggers are used (jeremyevans)
* Make Dataset#insert_select on PostgreSQL and MSSQL return false instead of nil if the INSERT query is sent to the database but returns no rows (jeremyevans)
* Add index_caching extension for caching calls to Database#indexes (kenaniah, jeremyevans) (#1461)
* Allow Database#indexes on SQLite, MSSQL, SQLAnywhere, and DB2 to handle SQL::Identifier values (jeremyevans)
* Add pg_timestamptz extension for using timestamptz (timestamp with time zone) as the default timestamp type (jeremyevans)
* Support Sequel.date_{add,sub} :cast option for setting cast type in date_arithmetic extension (jeremyevans)
* Optimize Database#synchronize implementation on ruby 2.5+ (jeremyevans)
* Add class_table_inheritance plugin :ignore_subclass_columns option (brianphillips) (#1459)
* Make Dataset#to_xml in xml_serializer work with eager_graphed datasets (jeremyevans)
* Make Dataset#to_json in json_serializer work with eager_graphed datasets (jeremyevans)
* Cache Dataset#nullify dataset in the null_dataset extension (chanks) (#1456)
* Add datetime_parse_to_time extension, for parsing timestamp strings without offsets using DateTime.parse.to_time (jeremyevans) (#1455)
* Add WHERE NULL filter for Dataset#where calls with no existing filter, no argument, and where the virtual row block returns nil (jeremyevans)
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