diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb')
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb | 93 |
1 files changed, 59 insertions, 34 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb index cea5a04006..4eb009c873 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -1,4 +1,5 @@ require 'active_record/connection_adapters/abstract_adapter' +require 'active_record/connection_adapters/statement_pool' require 'active_record/connection_adapters/mysql/column' require 'active_record/connection_adapters/mysql/explain_pretty_printer' require 'active_record/connection_adapters/mysql/quoting' @@ -14,16 +15,19 @@ module ActiveRecord class AbstractMysqlAdapter < AbstractAdapter include MySQL::Quoting include MySQL::ColumnDumper - include Savepoints def update_table_definition(table_name, base) # :nodoc: MySQL::Table.new(table_name, base) end - def schema_creation + def schema_creation # :nodoc: MySQL::SchemaCreation.new(self) end + def arel_visitor # :nodoc: + Arel::Visitors::MySQL.new(self) + end + ## # :singleton-method: # By default, the Mysql2Adapter will consider all columns of type <tt>tinyint(1)</tt> @@ -52,17 +56,16 @@ module ActiveRecord INDEX_TYPES = [:fulltext, :spatial] INDEX_USINGS = [:btree, :hash] + class StatementPool < ConnectionAdapters::StatementPool + private def dealloc(stmt) + stmt[:stmt].close + end + end + def initialize(connection, logger, connection_options, config) super(connection, logger, config) - @visitor = Arel::Visitors::MySQL.new self - - if self.class.type_cast_config_to_boolean(config.fetch(:prepared_statements) { true }) - @prepared_statements = true - @visitor.extend(DetermineIfPreparableVisitor) - else - @prepared_statements = false - end + @statements = StatementPool.new(self.class.type_cast_config_to_integer(config[:statement_limit])) if version < '5.0.0' raise "Your version of MySQL (#{full_version.match(/^\d+\.\d+\.\d+/)[0]}) is too old. Active Record supports MySQL >= 5.0." @@ -98,6 +101,12 @@ module ActiveRecord true end + # Returns true, since this connection adapter supports prepared statement + # caching. + def supports_statement_cache? + true + end + # Technically MySQL allows to create indexes with the sort order syntax # but at the moment (5.5) it doesn't yet implement them def supports_index_sort_order? @@ -160,8 +169,8 @@ module ActiveRecord raise NotImplementedError end - def new_column(field, default, sql_type_metadata, null, table_name, default_function = nil, collation = nil, comment = nil) # :nodoc: - MySQL::Column.new(field, default, sql_type_metadata, null, table_name, default_function, collation, comment) + def new_column(*args) #:nodoc: + MySQL::Column.new(*args) end # Must return the MySQL error number from the exception, if the exception has an @@ -183,6 +192,14 @@ module ActiveRecord end end + # CONNECTION MANAGEMENT ==================================== + + # Clears the prepared statements cache. + def clear_cache! + reload_type_map + @statements.clear + end + #-- # DATABASE STATEMENTS ====================================== #++ @@ -196,11 +213,6 @@ module ActiveRecord MySQL::ExplainPrettyPrinter.new.pp(result, elapsed) end - def clear_cache! - super - reload_type_map - end - # Executes the SQL statement in the context of this connection. def execute(sql, name = nil) log(sql, name) { @connection.query(sql) } @@ -335,8 +347,7 @@ module ActiveRecord def data_source_exists?(table_name) return false unless table_name.present? - schema, name = table_name.to_s.split('.', 2) - schema, name = @config[:database], schema unless name # A table was provided without a schema + schema, name = extract_schema_qualified_name(table_name) sql = "SELECT table_name FROM information_schema.tables " sql << "WHERE table_schema = #{quote(schema)} AND table_name = #{quote(name)}" @@ -351,8 +362,7 @@ module ActiveRecord def view_exists?(view_name) # :nodoc: return false unless view_name.present? - schema, name = view_name.to_s.split('.', 2) - schema, name = @config[:database], schema unless name # A view was provided without a schema + schema, name = extract_schema_qualified_name(view_name) sql = "SELECT table_name FROM information_schema.tables WHERE table_type = 'VIEW'" sql << " AND table_schema = #{quote(schema)} AND table_name = #{quote(name)}" @@ -394,20 +404,20 @@ module ActiveRecord else default, default_function = field[:Default], nil end - new_column(field[:Field], default, type_metadata, field[:Null] == "YES", table_name, default_function, field[:Collation], field[:Comment].presence) + new_column(field[:Field], default, type_metadata, field[:Null] == "YES", table_name, default_function, field[:Collation], comment: field[:Comment].presence) end end - def table_comment(table_name) + def table_comment(table_name) # :nodoc: select_value(<<-SQL.strip_heredoc, 'SCHEMA') SELECT table_comment - FROM INFORMATION_SCHEMA.TABLES - WHERE table_name=#{quote(table_name)}; + FROM information_schema.tables + WHERE table_name=#{quote(table_name)} SQL end - def create_table(table_name, options = {}) #:nodoc: - super(table_name, options.reverse_merge(:options => "ENGINE=InnoDB")) + def create_table(table_name, **options) #:nodoc: + super(table_name, options: 'ENGINE=InnoDB', **options) end def bulk_change_table(table_name, operations) #:nodoc: @@ -492,11 +502,19 @@ module ActiveRecord def add_index(table_name, column_name, options = {}) #:nodoc: index_name, index_type, index_columns, _, index_algorithm, index_using, comment = add_index_options(table_name, column_name, options) sql = "CREATE #{index_type} INDEX #{quote_column_name(index_name)} #{index_using} ON #{quote_table_name(table_name)} (#{index_columns}) #{index_algorithm}" + execute add_sql_comment!(sql, comment) + end + + def add_sql_comment!(sql, comment) # :nodoc: sql << " COMMENT #{quote(comment)}" if comment - execute sql + sql end def foreign_keys(table_name) + raise ArgumentError unless table_name.present? + + schema, name = extract_schema_qualified_name(table_name) + fk_info = select_all <<-SQL.strip_heredoc SELECT fk.referenced_table_name as 'to_table' ,fk.referenced_column_name as 'primary_key' @@ -504,8 +522,8 @@ module ActiveRecord ,fk.constraint_name as 'name' FROM information_schema.key_column_usage fk WHERE fk.referenced_column_name is not null - AND fk.table_schema = '#{@config[:database]}' - AND fk.table_name = '#{table_name}' + AND fk.table_schema = #{quote(schema)} + AND fk.table_name = #{quote(name)} SQL create_table_info = create_table_info(table_name) @@ -572,8 +590,7 @@ module ActiveRecord def primary_keys(table_name) # :nodoc: raise ArgumentError unless table_name.present? - schema, name = table_name.to_s.split('.', 2) - schema, name = @config[:database], schema unless name # A table was provided without a schema + schema, name = extract_schema_qualified_name(table_name) select_values(<<-SQL.strip_heredoc, 'SCHEMA') SELECT column_name @@ -716,6 +733,8 @@ module ActiveRecord RecordNotUnique.new(message) when 1452 InvalidForeignKey.new(message) + when 1406 + ValueTooLong.new(message) else super end @@ -881,8 +900,14 @@ module ActiveRecord create_table_info_cache[table_name] ||= select_one("SHOW CREATE TABLE #{quote_table_name(table_name)}")["Create Table"] end - def create_table_definition(name, temporary = false, options = nil, as = nil, comment = nil) # :nodoc: - MySQL::TableDefinition.new(name, temporary, options, as, comment) + def create_table_definition(*args) # :nodoc: + MySQL::TableDefinition.new(*args) + end + + def extract_schema_qualified_name(string) # :nodoc: + schema, name = string.to_s.scan(/[^`.\s]+|`[^`]*`/) + schema, name = @config[:database], schema unless name + [schema, name] end def integer_to_sql(limit) # :nodoc: |