diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb')
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb | 93 |
1 files changed, 42 insertions, 51 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb index 36c9815547..0ad114165e 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb @@ -3,6 +3,7 @@ gem "pg", "~> 0.18" require "pg" require "active_record/connection_adapters/abstract_adapter" +require "active_record/connection_adapters/statement_pool" require "active_record/connection_adapters/postgresql/column" require "active_record/connection_adapters/postgresql/database_statements" require "active_record/connection_adapters/postgresql/explain_pretty_printer" @@ -15,7 +16,6 @@ require "active_record/connection_adapters/postgresql/schema_dumper" require "active_record/connection_adapters/postgresql/schema_statements" require "active_record/connection_adapters/postgresql/type_metadata" require "active_record/connection_adapters/postgresql/utils" -require "active_record/connection_adapters/statement_pool" module ActiveRecord module ConnectionHandling # :nodoc: @@ -29,11 +29,11 @@ module ActiveRecord conn_params[:user] = conn_params.delete(:username) if conn_params[:username] conn_params[:dbname] = conn_params.delete(:database) if conn_params[:database] - # Forward only valid config params to PGconn.connect. - valid_conn_param_keys = PGconn.conndefaults_hash.keys + [:requiressl] + # Forward only valid config params to PG::Connection.connect. + valid_conn_param_keys = PG::Connection.conndefaults_hash.keys + [:requiressl] conn_params.slice!(*valid_conn_param_keys) - # The postgres drivers don't allow the creation of an unconnected PGconn object, + # The postgres drivers don't allow the creation of an unconnected PG::Connection object, # so just pass a nil connection object for the time being. ConnectionAdapters::PostgreSQLAdapter.new(nil, logger, conn_params, config) end @@ -121,14 +121,6 @@ module ActiveRecord include PostgreSQL::DatabaseStatements include PostgreSQL::ColumnDumper - def schema_creation # :nodoc: - PostgreSQL::SchemaCreation.new self - end - - def arel_visitor # :nodoc: - Arel::Visitors::PostgreSQL.new(self) - end - # Returns true, since this connection adapter supports prepared statement # caching. def supports_statement_cache? @@ -201,8 +193,8 @@ module ActiveRecord end def connection_active? - @connection.status == PGconn::CONNECTION_OK - rescue PGError + @connection.status == PG::CONNECTION_OK + rescue PG::Error false end end @@ -215,7 +207,7 @@ module ActiveRecord # @local_tz is initialized as nil to avoid warnings when connect tries to use it @local_tz = nil - @table_alias_length = nil + @max_identifier_length = nil connect add_pg_encoders @@ -236,7 +228,9 @@ module ActiveRecord # Clears the prepared statements cache. def clear_cache! - @statements.clear + @lock.synchronize do + @statements.clear + end end def truncate(table_name, name = nil) @@ -247,7 +241,7 @@ module ActiveRecord def active? @connection.query "SELECT 1" true - rescue PGError + rescue PG::Error false end @@ -279,11 +273,6 @@ module ActiveRecord NATIVE_DATABASE_TYPES end - # Returns true, since this connection adapter supports migrations. - def supports_migrations? - true - end - def set_standard_conforming_strings execute("SET standard_conforming_strings = on", "SCHEMA") end @@ -304,8 +293,8 @@ module ActiveRecord true end - # Range datatypes weren't introduced until PostgreSQL 9.2 def supports_ranges? + # Range datatypes weren't introduced until PostgreSQL 9.2 postgresql_version >= 90200 end @@ -317,6 +306,12 @@ module ActiveRecord postgresql_version >= 90400 end + def supports_alter_constraint? + # PostgreSQL 9.4 introduces ALTER TABLE ... ALTER CONSTRAINT but it has a bug and fixed in 9.4.2 + # https://www.postgresql.org/docs/9.4/static/release-9-4-2.html + postgresql_version >= 90402 + end + def get_advisory_lock(lock_id) # :nodoc: unless lock_id.is_a?(Integer) && lock_id.bit_length <= 63 raise(ArgumentError, "Postgres requires advisory lock ids to be a signed 64 bit integer") @@ -361,8 +356,9 @@ module ActiveRecord # Returns the configured supported identifier length supported by PostgreSQL def table_alias_length - @table_alias_length ||= query("SHOW max_identifier_length", "SCHEMA")[0][0].to_i + @max_identifier_length ||= select_value("SHOW max_identifier_length", "SCHEMA").to_i end + alias index_name_length table_alias_length # Set the authorized user for this session def session_auth=(user) @@ -374,19 +370,10 @@ module ActiveRecord @use_insert_returning end - def valid_type?(type) - !native_database_types[type].nil? - end - def update_table_definition(table_name, base) #:nodoc: PostgreSQL::Table.new(table_name, base) end - def lookup_cast_type(sql_type) # :nodoc: - oid = execute("SELECT #{quote(sql_type)}::regtype::oid", "SCHEMA").first["oid"].to_i - super(oid) - end - def column_name_for_operation(operation, node) # :nodoc: OPERATION_ALIASES.fetch(operation) { operation.downcase } end @@ -420,7 +407,7 @@ module ActiveRecord def translate_exception(exception, message) return exception unless exception.respond_to?(:result) - case exception.result.try(:error_field, PGresult::PG_DIAG_SQLSTATE) + case exception.result.try(:error_field, PG::PG_DIAG_SQLSTATE) when UNIQUE_VIOLATION RecordNotUnique.new(message) when FOREIGN_KEY_VIOLATION @@ -637,8 +624,10 @@ module ActiveRecord if in_transaction? raise ActiveRecord::PreparedStatementCacheExpired.new(e.cause.message) else - # outside of transactions we can simply flush this query and retry - @statements.delete sql_key(sql) + @lock.synchronize do + # outside of transactions we can simply flush this query and retry + @statements.delete sql_key(sql) + end retry end end @@ -655,7 +644,7 @@ module ActiveRecord CACHED_PLAN_HEURISTIC = "cached plan must not change result type".freeze def is_cached_plan_failure?(e) pgerror = e.cause - code = pgerror.result.result_error_field(PGresult::PG_DIAG_SQLSTATE) + code = pgerror.result.result_error_field(PG::PG_DIAG_SQLSTATE) code == FEATURE_NOT_SUPPORTED && pgerror.message.include?(CACHED_PLAN_HEURISTIC) rescue false @@ -674,25 +663,27 @@ module ActiveRecord # Prepare the statement if it hasn't been prepared, return # the statement key. def prepare_statement(sql) - sql_key = sql_key(sql) - unless @statements.key? sql_key - nextkey = @statements.next_key - begin - @connection.prepare nextkey, sql - rescue => e - raise translate_exception_class(e, sql) + @lock.synchronize do + sql_key = sql_key(sql) + unless @statements.key? sql_key + nextkey = @statements.next_key + begin + @connection.prepare nextkey, sql + rescue => e + raise translate_exception_class(e, sql) + end + # Clear the queue + @connection.get_last_result + @statements[sql_key] = nextkey end - # Clear the queue - @connection.get_last_result - @statements[sql_key] = nextkey + @statements[sql_key] end - @statements[sql_key] end # Connects to a PostgreSQL server and sets up the adapter depending on the # connected server's characteristics. def connect - @connection = PGconn.connect(@connection_parameters) + @connection = PG.connect(@connection_parameters) configure_connection rescue ::PG::Error => error if error.message.include?("does not exist") @@ -779,8 +770,8 @@ module ActiveRecord $1.strip if $1 end - def create_table_definition(*args) - PostgreSQL::TableDefinition.new(*args) + def arel_visitor + Arel::Visitors::PostgreSQL.new(self) end def can_perform_case_insensitive_comparison_for?(column) |