diff options
Diffstat (limited to 'activerecord')
5 files changed, 110 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb index 19ff780192..2cb0a2a4df 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_creation.rb @@ -39,7 +39,7 @@ module ActiveRecord end def visit_TableDefinition(o) - create_sql = +"CREATE#{' TEMPORARY' if o.temporary} TABLE " + create_sql = +"CREATE#{table_modifier_in_create(o)} TABLE " create_sql << "IF NOT EXISTS " if o.if_not_exists create_sql << "#{quote_table_name(o.name)} " @@ -121,6 +121,11 @@ module ActiveRecord sql end + # Returns any SQL string to go between CREATE and TABLE. May be nil. + def table_modifier_in_create(o) + " TEMPORARY" if o.temporary + end + def foreign_key_in_create(from_table, to_table, options) options = foreign_key_options(from_table, to_table, options) accept ForeignKeyDefinition.new(from_table, to_table, options) diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_creation.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_creation.rb index 8e381a92cf..ceb8b40bd9 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_creation.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_creation.rb @@ -23,6 +23,17 @@ module ActiveRecord end super end + + # Returns any SQL string to go between CREATE and TABLE. May be nil. + def table_modifier_in_create(o) + # A table cannot be both TEMPORARY and UNLOGGED, since all TEMPORARY + # tables are already UNLOGGED. + if o.temporary + " TEMPORARY" + elsif o.unlogged + " UNLOGGED" + end + end end end end diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb index 206b855a18..dc4a0bb26e 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb @@ -175,6 +175,13 @@ module ActiveRecord class TableDefinition < ActiveRecord::ConnectionAdapters::TableDefinition include ColumnMethods + attr_reader :unlogged + + def initialize(*) + super + @unlogged = ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.create_unlogged_tables + end + private def integer_like_primary_key_type(type, options) if type == :bigint || options[:limit] == 8 diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb index a11a786ec7..f701292be3 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb @@ -85,6 +85,18 @@ module ActiveRecord class PostgreSQLAdapter < AbstractAdapter ADAPTER_NAME = "PostgreSQL" + ## + # :singleton-method: + # PostgreSQL allows the creation of "unlogged" tables, which do not record + # data in the PostgreSQL Write-Ahead Log. This can make the tables faster, + # bug significantly increases the risk of data loss if the database + # crashes. As a result, this should not be used in production + # environments. If you would like all created tables to be unlogged you + # can add the following line to your test.rb file: + # + # ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.create_unlogged_tables = true + class_attribute :create_unlogged_tables, default: false + NATIVE_DATABASE_TYPES = { primary_key: "bigserial primary key", string: { name: "character varying" }, diff --git a/activerecord/test/cases/adapters/postgresql/create_unlogged_tables_test.rb b/activerecord/test/cases/adapters/postgresql/create_unlogged_tables_test.rb new file mode 100644 index 0000000000..a02bae1453 --- /dev/null +++ b/activerecord/test/cases/adapters/postgresql/create_unlogged_tables_test.rb @@ -0,0 +1,74 @@ +# frozen_string_literal: true + +require "cases/helper" +require "support/schema_dumping_helper" + +class UnloggedTablesTest < ActiveRecord::PostgreSQLTestCase + include SchemaDumpingHelper + + TABLE_NAME = "things" + LOGGED_FIELD = "relpersistence" + LOGGED_QUERY = "SELECT #{LOGGED_FIELD} FROM pg_class WHERE relname = '#{TABLE_NAME}'" + LOGGED = "p" + UNLOGGED = "u" + TEMPORARY = "t" + + class Thing < ActiveRecord::Base + self.table_name = TABLE_NAME + end + + def setup + @connection = ActiveRecord::Base.connection + ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.create_unlogged_tables = false + end + + teardown do + @connection.drop_table TABLE_NAME, if_exists: true + ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.create_unlogged_tables = false + end + + def test_logged_by_default + @connection.create_table(TABLE_NAME) do |t| + end + assert_equal @connection.execute(LOGGED_QUERY).first[LOGGED_FIELD], LOGGED + end + + def test_unlogged_in_test_environment_when_unlogged_setting_enabled + ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.create_unlogged_tables = true + + @connection.create_table(TABLE_NAME) do |t| + end + assert_equal @connection.execute(LOGGED_QUERY).first[LOGGED_FIELD], UNLOGGED + end + + def test_not_included_in_schema_dump + ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.create_unlogged_tables = true + + @connection.create_table(TABLE_NAME) do |t| + end + assert_no_match(/unlogged/i, dump_table_schema(TABLE_NAME)) + end + + def test_not_changed_in_change_table + @connection.create_table(TABLE_NAME) do |t| + end + + ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.create_unlogged_tables = true + + @connection.change_table(TABLE_NAME) do |t| + t.column :name, :string + end + assert_equal @connection.execute(LOGGED_QUERY).first[LOGGED_FIELD], LOGGED + end + + def test_gracefully_handles_temporary_tables + @connection.create_table(TABLE_NAME, temporary: true) do |t| + end + + # Temporary tables are already unlogged, though this query results in a + # different result ("t" vs. "u"). This test is really just checking that we + # didn't try to run `CREATE TEMPORARY UNLOGGED TABLE`, which would result in + # a PostgreSQL error. + assert_equal @connection.execute(LOGGED_QUERY).first[LOGGED_FIELD], TEMPORARY + end +end |