модуль ActiveRecord::ConnectionAdapters::DatabaseStatements

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 248
def add_transaction_record(record)
  @transaction.add_record(record)
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 253
def begin_db_transaction()    end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 267
def begin_isolated_db_transaction(isolation)
  raise ActiveRecord::TransactionIsolationError, "adapter does not support setting transaction isolation"
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 272
def commit_db_transaction()   end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 278
def default_sequence_name(table, column)
  nil
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 105
def delete(arel, name = nil, binds = [])
  exec_delete(to_sql(arel, binds), name, binds)
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 301
def empty_insert_statement_value
  "DEFAULT VALUES"
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 74
def exec_delete(sql, name, binds)
  exec_query(sql, name, binds)
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 67
def exec_insert(sql, name, binds, pk = nil, sequence_name = nil)
  exec_query(sql, name, binds)
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 61
def exec_query(sql, name = 'SQL', binds = [])
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 81
def exec_update(sql, name, binds)
  exec_query(sql, name, binds)
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 54
def execute(sql, name = nil)
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 93
def insert(arel, name = nil, pk = nil, id_value = nil, sequence_name = nil, binds = [])
  sql, binds = sql_for_insert(to_sql(arel, binds), pk, id_value, sequence_name, binds)
  value      = exec_insert(sql, name, binds, pk, sequence_name)
  id_value || last_inserted_id(value)
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 289
def insert_fixture(fixture, table_name)
  columns = schema_cache.columns_hash(table_name)

  key_list   = []
  value_list = fixture.map do |name, value|
    key_list << quote_column_name(name)
    quote(value, columns[name])
  end

  execute "INSERT INTO #{quote_table_name(table_name)} (#{key_list.join(', ')}) VALUES (#{value_list.join(', ')})", 'Fixture Insert'
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 305
def limited_update_conditions(where_sql, quoted_table_name, quoted_primary_key)
  "WHERE #{quoted_primary_key} IN (SELECT #{quoted_primary_key} FROM #{quoted_table_name} #{where_sql})"
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 283
def reset_sequence!(table, column, sequence = nil)
  # Do nothing by default. Implement for PostgreSQL, Oracle, ...
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 276
def rollback_db_transaction() end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 318
def sanitize_limit(limit)
  if limit.is_a?(Integer) || limit.is_a?(Arel::Nodes::SqlLiteral)
    limit
  elsif limit.to_s.include?(',')
    Arel.sql limit.to_s.split(',').map{ |i| Integer(i) }.join(',')
  else
    Integer(limit)
  end
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 22
def select_all(arel, name = nil, binds = [])
  arel, binds = binds_from_relation arel, binds
  select(to_sql(arel, binds), name, binds)
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 29
def select_one(arel, name = nil, binds = [])
  select_all(arel, name, binds).first
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 49
def select_rows(sql, name = nil, binds = [])
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 34
def select_value(arel, name = nil, binds = [])
  if result = select_one(arel, name, binds)
    result.values.first
  end
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 42
def select_values(arel, name = nil)
  arel, binds = binds_from_relation arel, []
  select_rows(to_sql(arel, binds), name, binds).map(&:first)
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 111
def supports_statement_cache?
  false
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 10
def to_sql(arel, binds = [])
  if arel.respond_to?(:ast)
    binds = binds.dup
    visitor.accept(arel.ast) do
      quote(*binds.shift.reverse)
    end
  else
    arel
  end
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 191
def transaction(options = {})
  options.assert_valid_keys :requires_new, :joinable, :isolation

  if !options[:requires_new] && current_transaction.joinable?
    if options[:isolation]
      raise ActiveRecord::TransactionIsolationError, "cannot set isolation when joining a transaction"
    end

    yield
  else
    within_new_transaction(options) { yield }
  end
rescue ActiveRecord::Rollback
  # rollbacks are silently swallowed
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 255
def transaction_isolation_levels
  {
    read_uncommitted: "READ UNCOMMITTED",
    read_committed:   "READ COMMITTED",
    repeatable_read:  "REPEATABLE READ",
    serializable:     "SERIALIZABLE"
  }
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 226
def transaction_open?
  @transaction.open?
end

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 100
def update(arel, name = nil, binds = [])
  exec_update(to_sql(arel, binds), name, binds)
end