## 3.1.0 2019-12-16

### Added

- `.nullify` that turns the result set of any relation into an empty set. Analogue of `ActiveRecord#none` (@ianks + @flash-gordon)

  ```ruby
  # Don't forget to activate the plugin
  conf.relation(:users) do
    use :nullify
  end

  users.nullify.count # => will always be 0
  users.nullify.to_a # => will always be empty ([])
  ```

### Fixed

- Make `Relation#wrap` respect association views (@ianks)
- Primitive JSON-compatible values such as Integer and String are automatically coerced to correct JSONB values and back if you're using a recent Sequel version (>= 5.2.0) (@flash-gordon)
- Properly qualify relations when in `Relation#union` (@ianks)
- `Relation#query` no longer removes order in the relation (@DNNX)

[Compare v3.0.1...v3.1.0](https://github.com/rom-rb/rom-sql/compare/v3.0.1...v3.1.0)

## 3.0.1 2019-05-05

### Fixed

- Using joins with a relation object as the target and a block-based conditions produces correct query now (issue #331) (solnic)

[Compare v3.0.0...v3.0.1](https://github.com/rom-rb/rom-sql/compare/v3.0.0...v3.0.1)

## 3.0.0 2019-04-24

### Added

- Join DSL so that you can use arbitrary conditions when joining relations (flash-gordon)
  ```ruby
  users.join(tasks) { |users:, tasks:|
    tasks[:user_id].is(users[:id]) & users[:name].is('John')
  }
  ```
  You also can use table aliases, however the setup is a bit hairy:
  ```ruby
  # self-join "users" with itself using "authors" as an alias
  authors = users.as(:authors).qualified(:authors)
  result = users.join(authors) { |users: |
    users[:id].is(authors[:id])
  }.select(:name)
  ```
- Support for `CASE` expression (wmaciejak + flash-gordon)

  ```ruby
  # matching expression result
  users.select_append { id.case(1 => string('one'), else: string('something else')).as(:one_or_else) }

  # searching for `true` result
  users.select_append { string::case(id.is(1) => 'one', else: 'else').as(:one_or_else) }
  ```

- Relations can be accessed in DSLs with keyword arguments (flash-gordon)
  ```ruby
  users.join(posts).select_append { |posts: | posts[:title] }
  ```
- Support for `.exists` in the projection DSL (flash-gordon)
  ```ruby
  users.select_append { |posts: |
    exists(posts.where(posts[:user_id] => id)).as(:has_posts)
  }
  ```
- `Relation#unfiltered` returns an unrestricted relation (removes restrictions from `WHERE` and `HAVING`) (flash-gordon)
- Support for `WITHIN GROUP` in the function DSL has been enhanced with block syntax (flash-gordon)

```ruby
 # previously available version
 households.project { float::percentile_cont(0.5).within_group(income).as(:percentile) }
 # using the new syntax
 households.project { float::percentile_cont(0.5).within_group { income }.as(:percentile) }
```

- Support for migrator options ie `ROM::Configuration.new(:sql, migrator: { path: "my_migrations" })` (rawburt)
- `Relation#pluck` works with multiple args too (timriley)

### Changed

- [BREAKING] Updated to work with `dry-types 1.0.0` (flash-gordon)
- [BREAKING] `Types::Int` is now `Types::Integer` (GustavoCaso)

### Fixed

- Using `Relation#inner_join` with has-many-through produces correct query (issue #279) (doriantaylor + solnic)
- Aliased attributes are handled correctly in `Relation#where` (waiting-for-dev)

[Compare v2.5.0...v3.0.0](https://github.com/rom-rb/rom-sql/compare/v2.5.0...v3.0.0)

## v2.5.0 2018-06-08

### Added

- Support for subqueries in `SELECT` and `WHERE` :tada: (flash-gordon)
  ```ruby
  tasks = relations[:tasks]
  users = relations[:users]
  user_tasks = tasks.where(tasks[:user_id].is(users[:id])
  tasks_count = user_tasks.select { integer::count(id) }
  users.select_append(tasks_count.as(:tasks_count))
  ```

[Compare v2.4.0...v2.5.0](https://github.com/rom-rb/rom-sql/compare/v2.4.0...v2.5.0)

## v2.4.0 2018-02-18

### Added

- Support for functions with `Any` return type (GustavoCaso)
- New `Relation#as_hash` method (GustavoCaso)

[Compare v2.3.0...v2.4.0](https://github.com/rom-rb/rom-sql/compare/v2.3.0...v2.4.0)

## v2.3.0 2017-11-17

### Added

- Command's `:timestamp` plugin now supports passing options (GustavoCaso)
- Configuration supports hash with connection options (Kjarrigan + solnic)

### Fixed

- Aliased attributes are handled correctly in PG's commands (cflipse)
- Command extensions are properly applied in multi-adapter setups (solnic)

### Internal

- Custom SQL-specific mapper compiler was added, which is used starting from rom-core 4.1.0 (solnic)
- Command's `:timestamp` plugin was removed, as it was moved to rom-core (GustavoCaso)

[Compare v2.2.1...v2.3.0](https://github.com/rom-rb/rom-sql/compare/v2.2.1...v2.3.0)

## v2.2.1 2017-11-10

### Fixed

- Instrumentation works with all db interactions (not just queries that materialize relations) (solnic)
- Typo in `MissingEnv` exception message (romatr)

[Compare v2.2.0...v2.2.1](https://github.com/rom-rb/rom-sql/compare/v2.2.0...v2.2.1)

## v2.2.0 2017-11-02

### Added

- Relation registry is passed as an argument to DSL blocks (in `select`, `where`, `order` etc.), which enables syntax like `select { |r| [id, r.tasks[:title]] }` (solnic)
- Support for self-referenced many-to-many associations (solnic)
- PG's geometric types include meta data about db types (GustavoCaso)

### Fixed

- Custom schema is used correctly in command results (solnic)
- Schemas no longer finalize PKs (this is done in core schema already) (solnic)

[Compare v2.1.0...v2.2.0](https://github.com/rom-rb/rom-sql/compare/v2.1.0...v2.2.0)

## v2.1.0 2017-10-23

### Added

- Support for PG's range types (v-kolesnikov)
- Support for PG's `ltree` (GustavoCaso + solnic)
- Support for the `FILTER` clause (flash-gordon)
- PG's array types will use custom types for processing members ie `ltree[]` will use `LTree` type (solnic)

### Fixed

- Schema inference works with primary keys that have custom types (ie an enum PK column) (v-kolesnikov)
- Ruby warnings are gone (solnic)

[Compare v2.0.0...v2.1.0](https://github.com/rom-rb/rom-sql/compare/v2.0.0...v2.1.0)

## v2.0.0 2017-10-18

### Added

- Support for schema plugins (flash-gordon)
- Support for auto migrations (flash-gordon)
- Add DLS for describing table indexes (flash-gordon)

  ```ruby
    schema do
      indexes do
        index :name, name: :unique_name, unique: true
        index :props, type: :gin
        index :name, name: :long_names_only, predicate: 'length(name) > 10'
        index :user_id, :title, name: :composite_idx
      end
    end
  ```

- Support for composite indexes in the auto-restrictions plugin (flash-gordon)
- `SQL::Gateway#call` calls a SQL function (flash-gordon)

  ```ruby
    gateway.(:upper, 'foo') # => "FOO"
    gateway.(:pg_advisory_xact_lock, 1234) # => nil
  ```

- `SQL::Gateway#run` executes a SQL string, e.g. a DDL statement (flash-gordon)

  ```ruby
    gateway.run('set session IntervalStyle to default')
  ```

- `SQL::Relation#exists` joins a relation with the `EXISTS` operator (flash-gordon)

  ```ruby
    users.exists(posts) # => users with posts
  ```

- Support for processing a relation in batches (flash-gordon)

  ```ruby
    users.each_batch(size: 100) do |rel|
      rel.
        command(:update).
        call(name: users[:first_name].concat(users[:last_name])
    end
  ```

- `SQL::Relation#import` inserts data from another relation using the `INSERT ... AS SELECT` syntax which is often far more effective than row-by-row processing and an ordinary multi-insert. Relations defined on another gateway are also supported, and in this case, the implementation falls back to the multi-insert strategy (flash-gordon)

  ```ruby
    users.import(authors.select { first_name.concat(last_name).as(:name) })
  ```

- Support for `tinytext`, `text`, `mediumtext`, and `longtext data types in MySQL (panthomakos)
- The new `pg_explain` plugin for getting query plans on PostgreSQL (flash-gordon)

  ```ruby
    users.by_pk(1).explain(format: :json, analyze: true)
  ```

- Support for window function calls

  ```ruby
    employees.select { [dep_no, salary, integer::avg(salary).over(partition: dep_no, order: id).as(:avg_salary)] }
  ```

- Function result can be negated, also `ROM::SQL::Function#not` was added (flash-gordon)

  ```ruby
     users.where { !lower(name).is('John') }
     users.where { lower(name).not('John') }
  ```

### Changed

- [BREAKING] based on rom 4.0 now (flash-gordon + solnic)
- [BREAKING] `Associates` command plugin requires associations now (solnic)
- [BREAKING] `Command#transaction` is gone in favor of `Relation#transaction` (solnic)
- [BREAKING] `PG::JSONArray`, `PG::JSONBArray`, `PG::JSONHash`, and `PG::JSONBHash` types were dropped, use `PG::JSON` and `PG::JSONB` instead (flash-gordon)
- [BREAKING] The `pg_hstore` extension now doesn't get loaded automatically, use the `:extension` option to load it on config initialization (flash-gordon)
- `ManyToOne` no longer uses a join (solnic)
- `AutoCombine` and `AutoWrap` plugins were removed as this functionality is provided by core API (solnic)
- Foreign keys are indexed by default (flash-gordon)
- Schemas are qualified by default (solnic)
- `PG::JSON`, `PG::JSONB`, and `PG::Array` now all have read types so that they return plain Hash/Array values instead of Sequel's wrappers (flash-gordon)

### Fixed

- Self-ref associations work correctly with custom FKs (solnic)
- Aliased associations with custom FKs work correctly (solnic)
- Defining a custom dataset block no longer prevents default views like `by_pk` to be defined (solnic)
- `Relation#group` uses canonical schema now (solnic)

[Compare v1.3.3...master](https://github.com/rom-rb/rom-sql/compare/v1.3.3...master)

## v1.3.3 2017-05-30

### Added

- `Relation#lock`, row-level locking using the `SELECT FOR UPDATE` clause (flash-gordon)
- `get` and `get_text` methods for the `PG::JSON` type (flash-gordon)
- Support for converting data type with `CAST` using the function DSL (flash-gordon)

  ```ruby
    users.select { string::cast(id, 'varchar').as(:id_str) }
  ```

- Support for`EXISTS` (v-kolesnikov)

  ```ruby
    subquery = tasks.where(tasks[:user_id].qualified => users[:id].qualified)
    users.where { exists(subquery) }
  ```

### Fixed

- Fixed a regression introduced in v1.3.2 caused by doing way more work processing the default dataset (flash-gordon)

[Compare v1.3.2...v1.3.3](https://github.com/rom-rb/rom-sql/compare/v1.3.2...v1.3.3)

## v1.3.2 2017-05-13

### Added

- Support for filtering with a SQL function in the `WHERE` clause. Be sure you're using it wisely and don't call it on large datasets ;) (flash-gordon)
- `Void` type for calling functions without returning value (flash-gordon)
- Support for [`PG::Array` transformations and queries](https://github.com/rom-rb/rom-sql/blob/15019a40e2cf2a224476184c4cddab4062a2cc01/lib/rom/sql/extensions/postgres/types.rb#L23-L148) (flash-gordon)

### Fixed

- A bunch of warnings from Sequel 4.46

[Compare v1.3.1...v1.3.2](https://github.com/rom-rb/rom-sql/compare/v1.3.1...v1.3.2)

## v1.3.1 2017-05-05

### Changed

- [internal] Compatibility with `dry-core` v0.3.0 (flash-gordon)

[Compare v1.3.0...v1.3.1](https://github.com/rom-rb/rom-sql/compare/v1.3.0...v1.3.1)

## v1.3.0 2017-05-02

### Added

- New `Relation#exist?` predicate checks if the relation has at least one tuple (flash-gordon)
- Support for [JSONB transformations and queries](https://github.com/rom-rb/rom-sql/blob/15019a40e2cf2a224476184c4cddab4062a2cc01/lib/rom/sql/extensions/postgres/types.rb#L170-L353) using native DSL (flash-gordon)
- Add `ROM::SQL::Attribute#not` for negated boolean equality expressions (AMHOL)
- Add `ROM::SQL::Attribute#!` for negated attribute's sql expressions (solnic)
- Inferrer gets limit constraints for string data types and stores them in type's meta (v-kolesnikov)

### Fixed

- Fixed usage of PostgreSQL's commands with a composite relation (flash-gordon)
- Translation of `true/false/nil` equality checks to `is/is not` SQL statements in `ROM::SQL::Attribute#is` (AMHOL)
- `associates` command plugin coerces parent collections to hashes correctly (aarek+solnic)
- `by_pk` works correctly even when PK is not projected (solnic)

### Changed

- Global private interface `SQL::Gateway.instance` has been deprecated. Now if you run migrations
  with ROM you should set up a ROM config in the `db:setup` task with something similar to

  ```ruby
    namespace :db
      task :setup do
        ROM::SQL::RakeSupport.env = ROM::Configuration.new(:sql, ENV['DATABASE_URL'])
      end
    end
  ```

[Compare v1.2.2...v1.3.0](https://github.com/rom-rb/rom-sql/compare/v1.2.2...v1.3.0)

## v1.2.2 2017-03-25

### Changed

- Updated `dry-initializer` (flash-gordon)

[Compare v1.2.1...v1.2.2](https://github.com/rom-rb/rom-sql/compare/v1.2.1...v1.2.2)

## v1.2.1 2017-03-09

### Fixed

- Allow for joining by a `RelationProxy` instance from `rom-repository` (davydovanton)

[Compare v1.2.0...v1.2.1](https://github.com/rom-rb/rom-sql/compare/v1.2.0...v1.2.1)

## v1.2.0 2017-03-07

### Added

- Support for configuring multiple associations for a command (solnic)
- Support for passing parent tuple(s) as `parent` option in `Command#with_association` (solnic)
- Support for join using assocation name (flash-gordon)

[Compare v1.1.2...v1.2.0](https://github.com/rom-rb/rom-sql/compare/v1.1.2...v1.2.0)

## v1.1.2 2017-03-02

### Fixed

- Fix grouping by a function in the block DSL (flash-gordon)

[Compare v1.1.1...v1.1.2](https://github.com/rom-rb/rom-sql/compare/v1.1.1...v1.1.2)

## v1.1.1 2017-03-01

### Fixed

- Restriction conditions with an array as a value are handled correctly by attribute types (solnic)

[Compare v1.1.0...v1.1.1](https://github.com/rom-rb/rom-sql/compare/v1.1.0...v1.1.1)

## v1.1.0 2017-03-01

### Added

- Added inferring for database indices (flash-gordon)
- Restriction conditions are now coerced using schema attributes (solnic)
- `:instrumentation` relation plugin that can be configured with any instrumentation backend (solnic)
- `:auto_restrictions` relation plugin, which defines `by_*` views restricting relations by their indexed attributes (solnic)

### Fixed

- Missing `group` method was added to legacy `SequelAPI` module (solnic)
- Associations properly maintain `order` if it was set (solnic)

[Compare v1.0.3...v1.1.0](https://github.com/rom-rb/rom-sql/compare/v1.0.3...v1.1.0)

## v1.0.3 2017-02-23

### Changed

- `AutoCombine#preload` uses better restriction for `ManyToOne` association which greatly speeds up loading bigger amounts of data (solnic + flash-gordon)

### Fixed

- Fix the usage of timestamp in command chains (cflipse)

[Compare v1.0.2...v1.0.3](https://github.com/rom-rb/rom-sql/compare/v1.0.2...v1.0.3)

## v1.0.2 2017-02-16

### Added

- Support for selecting literal strings via `` select { `'foo'`.as(:bar) } `` (solnic)

[Compare v1.0.1...v1.0.2](https://github.com/rom-rb/rom-sql/compare/v1.0.1...v1.0.2)

## v1.0.1 2017-02-09

### Added

- Support for inferring the PostgreSQL `hstore` data type (flash-gordon)
- Support for the rest of geometric PostgreSQL data types (box, lseg, polygon, etc.) (Morozzzko)
- Added inferring for timestamp types with specified precision (flash-gordon)
- Added `ROM::SQL::Attribute#in` to support range checks in conditions (flash-gordon)

### Fixed

- Missing primary key now leads to a more meaningful error (flash-gordon)

[Compare v1.0.0...v1.0.1](https://github.com/rom-rb/rom-sql/compare/v1.0.0...v1.0.1)

## v1.0.0 2017-01-29

This release is based on rom core 3.0.0 with its improved Schema API, which is extended with SQL-specific features.

Please refer to [the upgrading guide](https://github.com/rom-rb/rom-sql/wiki/Upgrading-from-0.9.x-to-1.0.0) if you're moving from 0.9.x to 1.0.0.

### Added

- [BREAKING] All relations have schemas (inferred by default, but still possible to override and/or extend) (solnic)
- [BREAKING] Schemas are used when defining relation views (solnic)
- [BREAKING] Default dataset is set up based on schema (solnic)
- Extended query API with support for schema attributes (solnic)
- Schemas can project relations automatically (solnic)
- New `Schema#qualified` (solnic)
- New `Relation#assoc` method which is a shortcut for accessing relation created by the given association (solnic)
- Schema attribute types are now SQL-specific and compatible with query DSL (ie you can pass relation attributes to `select` and they will be automatically converted to valid SQL expressions) (solnic)
- Associations support setting custom `view` that will be used to extend association relation (solnic)
- Associations support setting custom `foreign_key` names (solnic)
- Update commands has `:associates` plugin enabled (solnic)
- Support for self-referencing associations (ie categories have_many child categories) (solnic)
- Inferrers for mysql and sqlite were added (flash-gordon)
- PG's auto-inferrer can handle `inet`/`cidr`/`point` data types in a two-way manner, i.e. converting them back and forth on reading and writing (flash-gordon)
- Support for inferring more PG types: `macaddr`, `xml` (flash-gordon)
- `ROM::SQL::Relation::SequelAPI` extension for backward-compatible query API (this will be deprecated in 1.1.0 and removed in 2.0.0) (solnic)
- Added `Object` type for `SQLite` which is used by the inferrer for columns without a type affinity (flash-gordon)
- Support for composite PKs in the default `by_pk` view (solnic)

### Changed

- [BREAKING] `Relation#header` has been removed in favor of schemas (solnic)
- [BREAKING] `Relation#base` has been removed as now a vanilla relation _is a base relation view_ (solnic)
- [BREAKING] Deprecated `Relation.primary_key` has been removed in favor of schema (solnic)
- [BREAKING] Deprecated `Commands::Update#change` has been removed (solnic)
- [BREAKING] Deprecated `Commands.validator` has been removed (solnic)
- [BREAKING] `assoc_macros` plugin has been removed, please use associations from now (solnic)
- Default `by_pk` uses schema attributes, it will raise exception if PK attribute is missing in the schema (solnic)
- [internal] Associations use schemas for relation projections (solnic)
- [internal] `select`, `select_append`, `project`, `inner_join` and `left_join` use schemas internally (solnic)
- [internal] Deprecation and constants are now based on dry-core (flash-gordon)

[Compare v0.9.1...v1.0.0](https://github.com/rom-rb/rom-sql/compare/v0.9.1...v1.0.0)

## v0.9.1 2016-12-23

### Added

- Support for PG enums in schema inferrer (flash-gordon)
- `ROM::SQL::Relation#read` method which accepts an SQL string and returns a new relation (solnic)

[Compare v0.9.0...v0.9.1](https://github.com/rom-rb/rom-sql/compare/v0.9.0...v0.9.1)

## v0.9.0 2016-11-08

### Added

- `Associations::{OneToMany,OneToOne}#associate` for merging FKs into child tuple (jodosha)
- Added support for PostgreSQL types: UUID, Array, JSONB and Money (jodosha)
- Support for DB specific schema inferrers (flash-gordon)
- Automatically infer PG arrays and JSON(B) types (jodosha + flash-gordon)
- Support for `Relation#having` (cflipse)

### Changed

- Inferred types in schemas **are no longer strict** (flash-gordon)
- PG-specific types are handled by `:postgres` extension and it loads connection extensions automatically (flash-gordon)
- Make `OneToOne` inherit from `OneToMany` (beauby)
- Default dataset will use column names from schema if it's available (solnic)

### Fixed

- Floats are inferred by schemas (cflipse)

[Compare v0.8.0...v0.9.0](https://github.com/rom-rb/rom-sql/compare/v0.8.0...v0.9.0)

## v0.8.0 2016-07-27

### Added

- Support for relation schemas with SQL-specific data types (solnic + flash-gordon)
- One-To-Many support in schemas (solnic + flash-gordon)
- One-To-One support in schemas (solnic + flash-gordon)
- One-To-One-Through support in schemas (solnic + flash-gordon)
- Many-To-One support in schemas (solnic + flash-gordon)
- Many-To-Many support in schemas (solnic + flash-gordon)
- Support for `has_many`, `has_one` and `belongs_to` convenient methods in schema DSL (solnic)
- Support for custom PG types: `Types::PG::Array`, `Types::PG::Hash`, `Types::PG::JSON`, and `Types::PG::Bytea` (solnic + flash-gordon)
- Optional automatic schema inference for attributes and foreign keys based on DB metadata provided by Sequel (flash-gordon)
- Support for arbitrary dataset and FK names in schemas (flash-gordon)
- Support for native upserts in PostgreSQL >= 9.5 via `Commands::Postgres::Upsert` (gotar + flash-gordon)

### Changed

- `Create` and `Update` commands have `:schema` plugin enabled by default which sets input handler based on schema definition automatically (solnic)
- `associates` command plugin uses schema associations now (solnic)
- Dropped MRI 2.0.x support

### Fixed

- `Create` command properly materialize result when `:one` is set (AMHOL)

[Compare v0.7.0...v0.8.0](https://github.com/rom-rb/rom-sql/compare/v0.7.0...v0.8.0)

## v0.7.0 2016-01-06

### Added

- Repository plugins have been imported:
  - `view` allows defining a relation view with an explicit header (solnic)
  - `base_view` defines a base view with all column names as the header (solnic)
  - `auto_combine` defines a generic `for_combine` method which eager-loads
    parent/children relation (solnic)
  - `auto-wrap` defines a generic `for_wrap` method which inner-joins
    a parent/children relation (solnic)
- Possibility to check for pending migrations (gotar)
- `Relation#sum` interface (gotar)
- `Relation#avg` interface (gotar)
- `Relation#min` interface (gotar)
- `Relation#max` interface (gotar)
- `Relation#union` interface (spscream)
- `primary_key` macro which allows setting a custom primary key when it cannot be
  inferred automatically (solnic)

### Changed

- `ROM::SQL.gateway` renamed to `ROM::SQL::Gateway.instance` for migrations (endash)
- Association macros are now an optional plugin (solnic)

[Compare v0.6.1...v0.7.0](https://github.com/rom-rb/rom-sql/compare/v0.6.1...v0.7.0)

## v0.6.1 2015-09-23

### Added

- `Gateway` accepts `:extensions` as an option (c0)

[Compare v0.6.0...v0.6.1](https://github.com/rom-rb/rom-sql/compare/v0.6.0...v0.6.1)

## v0.6.0 2015-08-19

Internal updates to fix deprecation warnings from ROM 0.9.0.

[Compare v0.5.3...v0.6.0](https://github.com/rom-rb/rom-sql/compare/v0.5.3...v0.6.0)

## v0.5.3 2015-07-23

### Added

- `Relation#multi_insert` (draxxxeus)

### Changed

- Command that receives many tuples will use `multi_insert` now (draxxxeus)

### Fixed

- Relation name and join key fixes for `many_to_one` macro (jamesmoriarty)

[Compare v0.5.2...v0.5.3](https://github.com/rom-rb/rom-sql/compare/v0.5.2...v0.5.3)

## v0.5.2 2015-06-22

### Added

- `Relation#invert` operation (nepalez)

### Changed

- Migration tasks no longer require entire ROM env (solnic)
- `Repository` => `Gateway` rename for ROM 0.8.0 compatibility (solnic)

[Compare v0.5.1...v0.5.2](https://github.com/rom-rb/rom-sql/compare/v0.5.1...v0.5.2)

## v0.5.1 2015-05-25

### Changed

- Relations won't be finalized when table(s) is/are missing (solnic)

### Fixed

- Wrap errors when calling commands with `[]`-syntax (kwando)

[Compare v0.5.0...v0.5.1](https://github.com/rom-rb/rom-sql/compare/v0.5.0...v0.5.1)

## v0.5.0 2015-05-22

### Added

- Association macros support addition `:on` option (solnic)
- `associates` plugin for `Create` command (solnic)
- Support for NotNullConstraintError (solnic)
- Support for UniqueConstraintConstraintError (solnic)
- Support for ForeignKeyConstraintError (solnic)
- Support for CheckConstraintError (solnic)
- `Commands::Update#original` supports objects coercible to_h now (solnic)

### Changed

- [BREAKING] Constraint errors are no longer command errors which means `try` and
  `transaction` blocks will not catch them (solnic)
- `Commands::Update#set` has been deprecated (solnic)
- `Commands::Update#to` has been deprecated (solnic)

[Compare v0.4.3...v0.5.0](https://github.com/rom-rb/rom-sql/compare/v0.4.2...v0.5.0)

## v0.4.3 2015-05-17

### Fixed

- `transaction` doesn't swallow errors now other than CommandError (solnic)

[Compare v0.4.2...v0.4.3](https://github.com/rom-rb/rom-sql/compare/v0.4.2...v0.4.3)

## v0.4.2 2015-05-17

### Added

- Support for setting custom association name (solnic)
- Support for `:conditions` option in association definition (solnic)
- Better error message when accessing undefined associations (pdswan)

### Fixed

- Correct `ROM::SQL::Plugin::Pagination::Pager#total_pages` when total is not
  evenly divisible by page size (larribas)
- `association_join` behaves correctly when dataset is different than register_as (nepalez)

### Changed

- `transaction` returns command failure objects when there was a rollback (solnic)

[Compare v0.4.1...v0.4.2](https://github.com/rom-rb/rom-sql/compare/v0.4.1...v0.4.2)

## v0.4.1 2015-04-04

### Added

- Database error handling for update and delete commands (kwando + solnic)
- Migration interface as a repository plugin (gotar + solnic)

[Compare v0.4.0...v0.4.1](https://github.com/rom-rb/rom-sql/compare/v0.4.0...v0.4.1)

## v0.4.0 2015-03-22

### Added

- `ROM::SQL::Relation` which explictly defines an interface on top of Sequel (solnic + mcls)
- Postgres-specific Create and Update commands that support RETURNING (gotar + solnic)
- `Update#change` interface for skipping execution when there's no diff (solnic)
- Experimental migration API using sequel/migrations (gotar)
- Pagination plugin (solnic)
- Allow reuse of established Sequel connections (splattael)

### Changed

- Use ROM's own inflector which uses either ActiveSupport or Inflecto backends (mjtko)

### Fixed

- Indentation in Rails logger (morgoth)

[Compare v0.3.2...v0.4.0](https://github.com/rom-rb/rom-sql/compare/v0.3.2...v0.4.0)

## v0.3.2 2015-01-01

### Fixed

- Checking tuple count in commands (solnic)

[Compare v0.3.1...v0.3.2](https://github.com/rom-rb/rom-sql/compare/v0.3.1...v0.3.2)

## v0.3.1 2014-12-31

### Added

- `Adapter#disconnect` (solnic)
- Support for extra connection options (solnic)

[Compare v0.3.0...v0.3.1](https://github.com/rom-rb/rom-sql/compare/v0.3.0...v0.3.1)

## v0.3.0 2014-12-19

### Changed

- `association_join` now uses Sequel's `graph` interface which qualifies columns automatically (solnic)
- Delete command returns deleted tuples (solnic)

[Compare v0.2.0...v0.3.0](https://github.com/rom-rb/rom-sql/compare/v0.2.0...v0.3.0)

## v0.2.0 2014-12-06

### Added

- Command API (solnic)
- Support for ActiveSupport::Notifications with a log subscriber (solnic)
- New `ROM::SQL::Adapter#dataset?(name)` checking if a given table exists (solnic)

[Compare v0.1.1...v0.2.0](https://github.com/rom-rb/rom-sql/compare/v0.1.1...v0.2.0)

## v0.1.1 2014-11-24

### Fixed

- Equalizer in header (solnic)

### Changed

- minor refactor in adapter (solnic)

[Compare v0.1.0...v0.1.1](https://github.com/rom-rb/rom-sql/compare/v0.1.0...v0.1.1)

## v0.1.0 2014-11-24

First release powered by Sequel