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 | 94 |
1 files changed, 68 insertions, 26 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 4b7c74e0b8..560773ca86 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -4,6 +4,13 @@ module ActiveRecord module ConnectionAdapters class AbstractMysqlAdapter < AbstractAdapter class Column < ConnectionAdapters::Column # :nodoc: + attr_reader :collation + + def initialize(name, default, sql_type = nil, null = true, collation = nil) + super(name, default, sql_type, null) + @collation = collation + end + def extract_default(default) if sql_type =~ /blob/i || type == :text if default.blank? @@ -28,6 +35,10 @@ module ActiveRecord raise NotImplementedError end + def case_sensitive? + collation && !collation.match(/_ci$/) + end + private def simplified_type(field_type) @@ -116,10 +127,7 @@ module ActiveRecord super(connection, logger) @connection_options, @config = connection_options, config @quoted_column_names, @quoted_table_names = {}, {} - end - - def self.visitor_for(pool) # :nodoc: - Arel::Visitors::MySQL.new(pool) + @visitor = Arel::Visitors::MySQL.new self end def adapter_name #:nodoc: @@ -144,6 +152,12 @@ module ActiveRecord 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? + true + end + def native_database_types NATIVE_DATABASE_TYPES end @@ -157,8 +171,8 @@ module ActiveRecord end # Overridden by the adapters to instantiate their specific Column type. - def new_column(field, default, type, null) # :nodoc: - Column.new(field, default, type, null) + def new_column(field, default, type, null, collation) # :nodoc: + Column.new(field, default, type, null, collation) end # Must return the Mysql error number from the exception, if the exception has an @@ -298,11 +312,11 @@ module ActiveRecord sql = "SHOW TABLES" end - select_all(sql).map do |table| + select_all(sql).map { |table| table.delete('Table_type') sql = "SHOW CREATE TABLE #{quote_table_name(table.to_a.first.last)}" exec_without_stmt(sql).first['Create Table'] + ";\n\n" - end.join("") + }.join end # Drops the database specified on the +name+ attribute @@ -349,8 +363,10 @@ module ActiveRecord show_variable 'collation_database' end - def tables(name = nil, database = nil) #:nodoc: - sql = ["SHOW TABLES", database].compact.join(' IN ') + def tables(name = nil, database = nil, like = nil) #:nodoc: + sql = "SHOW TABLES " + sql << "IN #{database} " if database + sql << "LIKE #{quote(like)}" if like execute_and_free(sql, 'SCHEMA') do |result| result.collect { |field| field.first } @@ -358,7 +374,8 @@ module ActiveRecord end def table_exists?(name) - return true if super + return false unless name + return true if tables(nil, nil, name).any? name = name.to_s schema, table = name.split('.', 2) @@ -368,7 +385,7 @@ module ActiveRecord schema = nil end - tables(nil, schema).include? table + tables(nil, schema, table).any? end # Returns an array of indexes for the given table. @@ -393,10 +410,10 @@ module ActiveRecord # Returns an array of +Column+ objects for the table specified by +table_name+. def columns(table_name, name = nil)#:nodoc: - sql = "SHOW FIELDS FROM #{quote_table_name(table_name)}" + sql = "SHOW FULL FIELDS FROM #{quote_table_name(table_name)}" execute_and_free(sql, 'SCHEMA') do |result| each_hash(result).map do |field| - new_column(field[:Field], field[:Default], field[:Type], field[:Null] == "YES") + new_column(field[:Field], field[:Default], field[:Type], field[:Null] == "YES", field[:Collation]) end end end @@ -485,9 +502,14 @@ module ActiveRecord # Returns a table's primary key and belonging sequence. def pk_and_sequence_for(table) - execute_and_free("DESCRIBE #{quote_table_name(table)}", 'SCHEMA') do |result| - keys = each_hash(result).select { |row| row[:Key] == 'PRI' }.map { |row| row[:Field] } - keys.length == 1 ? [keys.first, nil] : nil + execute_and_free("SHOW CREATE TABLE #{quote_table_name(table)}", 'SCHEMA') do |result| + create_table = each_hash(result).first[:"Create Table"] + if create_table.to_s =~ /PRIMARY KEY\s+\((.+)\)/ + keys = $1.split(",").map { |key| key.gsub(/`/, "") } + keys.length == 1 ? [keys.first, nil] : nil + else + nil + end end end @@ -501,23 +523,43 @@ module ActiveRecord Arel::Nodes::Bin.new(node) end + def case_insensitive_comparison(table, attribute, column, value) + if column.case_sensitive? + super + else + table[attribute].eq(value) + end + end + def limited_update_conditions(where_sql, quoted_table_name, quoted_primary_key) where_sql end protected + def add_index_length(option_strings, column_names, options = {}) + if options.is_a?(Hash) && length = options[:length] + case length + when Hash + column_names.each {|name| option_strings[name] += "(#{length[name]})" if length.has_key?(name)} + when Fixnum + column_names.each {|name| option_strings[name] += "(#{length})"} + end + end + + return option_strings + end + def quoted_columns_for_index(column_names, options = {}) - length = options[:length] if options.is_a?(Hash) + option_strings = Hash[column_names.map {|name| [name, '']}] - case length - when Hash - column_names.map {|name| length[name] ? "#{quote_column_name(name)}(#{length[name]})" : quote_column_name(name) } - when Fixnum - column_names.map {|name| "#{quote_column_name(name)}(#{length})"} - else - column_names.map {|name| quote_column_name(name) } - end + # add index length + option_strings = add_index_length(option_strings, column_names, options) + + # add index sort order + option_strings = add_index_sort_order(option_strings, column_names, options) + + column_names.map {|name| quote_column_name(name) + option_strings[name]} end def translate_exception(exception, message) |